https://www.fireconvertapp.com/remove-background https://www.fireconvertapp.com/og/tools/remove-background.png Remove Background — convert with FireConvertApp Upload, get a cutout with a transparent background. Runs locally — no server upload. https://www.fireconvertapp.com/upscale-image https://www.fireconvertapp.com/og/tools/upscale-image.png Upscale Image — convert with FireConvertApp Turn a small image into a large one without the usual blur. AI hallucinates plausible detail, locally. https://www.fireconvertapp.com/heic-to-jpg https://www.fireconvertapp.com/og/tools/heic-to-jpg.png HEIC to JPG — convert with FireConvertApp iPhone photos that won't open on Windows? One drop, done. https://www.fireconvertapp.com/image-compressor https://www.fireconvertapp.com/og/tools/image-compressor.png Image Compressor — convert with FireConvertApp Drop a photo. Get it back smaller. Quality stays where you like it. https://www.fireconvertapp.com/webp-to-png https://www.fireconvertapp.com/og/tools/webp-to-png.png WEBP to PNG — convert with FireConvertApp Keep full quality. No watermarks, no sign-up. https://www.fireconvertapp.com/png-to-jpg https://www.fireconvertapp.com/og/tools/png-to-jpg.png PNG to JPG — convert with FireConvertApp Drop the transparency, shrink the file. https://www.fireconvertapp.com/jpg-to-png https://www.fireconvertapp.com/og/tools/jpg-to-png.png JPG to PNG — convert with FireConvertApp Need a transparent background? Start here. https://www.fireconvertapp.com/compress-jpeg https://www.fireconvertapp.com/og/tools/compress-jpeg.png Compress JPEG — convert with FireConvertApp Perceptual tuning, not just a lower number. https://www.fireconvertapp.com/webp-to-jpg https://www.fireconvertapp.com/og/tools/webp-to-jpg.png WEBP to JPG — convert with FireConvertApp Maximum compatibility. One click. https://www.fireconvertapp.com/heic-to-png https://www.fireconvertapp.com/og/tools/heic-to-png.png HEIC to PNG — convert with FireConvertApp Lossless. Preserve every pixel. https://www.fireconvertapp.com/resize-image https://www.fireconvertapp.com/og/tools/resize-image.png Resize Image — convert with FireConvertApp Three ways to shrink. No fidelity lost. https://www.fireconvertapp.com/crop-image https://www.fireconvertapp.com/og/tools/crop-image.png Crop Image — convert with FireConvertApp Pick an aspect ratio or exact size — we center-crop. https://www.fireconvertapp.com/jfif-to-png https://www.fireconvertapp.com/og/tools/jfif-to-png.png JFIF to PNG — convert with FireConvertApp Email attachments that don't open? Fix here. https://www.fireconvertapp.com/avif-to-png https://www.fireconvertapp.com/og/tools/avif-to-png.png AVIF to PNG — convert with FireConvertApp Modern format out, universal format in. https://www.fireconvertapp.com/avif-to-jpg https://www.fireconvertapp.com/og/tools/avif-to-jpg.png AVIF to JPG — convert with FireConvertApp Smaller size, every-device compatibility. https://www.fireconvertapp.com/gif-to-png https://www.fireconvertapp.com/og/tools/gif-to-png.png GIF to PNG — convert with FireConvertApp Grab a single frame — sharper, smaller. https://www.fireconvertapp.com/jpg-to-webp https://www.fireconvertapp.com/og/tools/jpg-to-webp.png JPG to WEBP — convert with FireConvertApp Keep the look, cut the weight by 30–40%. https://www.fireconvertapp.com/tiff-to-jpg https://www.fireconvertapp.com/og/tools/tiff-to-jpg.png TIFF to JPG — convert with FireConvertApp Scanner output into something you can email. https://www.fireconvertapp.com/image-converter https://www.fireconvertapp.com/og/tools/image-converter.png Image Converter — convert with FireConvertApp HEIC, WEBP, PNG, JPG, AVIF, GIF, TIFF — pick the output, done. https://www.fireconvertapp.com/pdf-merge https://www.fireconvertapp.com/og/tools/pdf-merge.png Merge PDF — convert with FireConvertApp Drop two or more PDFs, get a single merged file. No sign-up. https://www.fireconvertapp.com/pdf-split https://www.fireconvertapp.com/og/tools/pdf-split.png Split PDF — convert with FireConvertApp Extract page ranges into separate PDFs. 1-3,5,7-9. https://www.fireconvertapp.com/pdf-compressor https://www.fireconvertapp.com/og/tools/pdf-compressor.png Compress PDF — convert with FireConvertApp Best-effort PDF compression. Smaller file, same pages. https://www.fireconvertapp.com/pdf-converter https://www.fireconvertapp.com/og/tools/pdf-converter.png PDF Converter — convert with FireConvertApp Merge, split, compress, JPG, Word, and more — pick your lane. https://www.fireconvertapp.com/pdf-to-word https://www.fireconvertapp.com/og/tools/pdf-to-word.png PDF to Word — convert with FireConvertApp Extract editable text into a ready-to-open .docx. https://www.fireconvertapp.com/pdf-to-jpg https://www.fireconvertapp.com/og/tools/pdf-to-jpg.png PDF to JPG — convert with FireConvertApp Each page becomes a sharp JPG. Download them all as a ZIP. https://www.fireconvertapp.com/pdf-to-epub https://www.fireconvertapp.com/og/tools/pdf-to-epub.png PDF to EPUB — convert with FireConvertApp Text-only reflow → readable on Kindle, Kobo, Apple Books. https://www.fireconvertapp.com/epub-to-pdf https://www.fireconvertapp.com/og/tools/epub-to-pdf.png EPUB to PDF — convert with FireConvertApp Text-only layout — printable, any device. https://www.fireconvertapp.com/docx-to-pdf https://www.fireconvertapp.com/og/tools/docx-to-pdf.png DOCX to PDF — convert with FireConvertApp Clean text layout — drop a .docx, get a PDF. https://www.fireconvertapp.com/jpg-to-pdf https://www.fireconvertapp.com/og/tools/jpg-to-pdf.png JPG to PDF — convert with FireConvertApp Drop a photo. Download a share-ready PDF. https://www.fireconvertapp.com/png-to-pdf https://www.fireconvertapp.com/og/tools/png-to-pdf.png PNG to PDF — convert with FireConvertApp Lossless embed — text stays crisp, transparency is preserved. https://www.fireconvertapp.com/webp-to-pdf https://www.fireconvertapp.com/og/tools/webp-to-pdf.png WEBP to PDF — convert with FireConvertApp Modern web images, universally viewable. https://www.fireconvertapp.com/png-to-ico https://www.fireconvertapp.com/og/tools/png-to-ico.png PNG to ICO — convert with FireConvertApp Drop a PNG. Get a favicon.ico ready for any site. https://www.fireconvertapp.com/jpg-to-ico https://www.fireconvertapp.com/og/tools/jpg-to-ico.png JPG to ICO — convert with FireConvertApp Photo → icon in one drop. 256×256 max, native ICO container. https://www.fireconvertapp.com/ico-to-png https://www.fireconvertapp.com/og/tools/ico-to-png.png ICO to PNG — convert with FireConvertApp Extract the largest frame from any .ico as a clean PNG. https://www.fireconvertapp.com/heic-to-pdf https://www.fireconvertapp.com/og/tools/heic-to-pdf.png HEIC to PDF — convert with FireConvertApp iPhone photos into a share-ready PDF. https://www.fireconvertapp.com/video-converter https://www.fireconvertapp.com/og/tools/video-converter.png Video Converter — convert with FireConvertApp MP4, WebM, MOV, MKV — pick what you need. https://www.fireconvertapp.com/audio-converter https://www.fireconvertapp.com/og/tools/audio-converter.png Audio Converter — convert with FireConvertApp MP3, OGG, WAV, M4A, FLAC — one picker, one click. https://www.fireconvertapp.com/mp4-to-mp3 https://www.fireconvertapp.com/og/tools/mp4-to-mp3.png MP4 to MP3 — convert with FireConvertApp Pull the audio out of any video. https://www.fireconvertapp.com/video-to-mp3 https://www.fireconvertapp.com/og/tools/video-to-mp3.png Video to MP3 — convert with FireConvertApp Any video, audio-only output. https://www.fireconvertapp.com/mov-to-mp4 https://www.fireconvertapp.com/og/tools/mov-to-mp4.png MOV to MP4 — convert with FireConvertApp iPhone videos → universal format. https://www.fireconvertapp.com/mp4-converter https://www.fireconvertapp.com/og/tools/mp4-converter.png MP4 Converter — convert with FireConvertApp Drop any video. Get back a universally-playable MP4. https://www.fireconvertapp.com/mp3-converter https://www.fireconvertapp.com/og/tools/mp3-converter.png MP3 Converter — convert with FireConvertApp Pull audio out of anything. 192 kbps, no fuss. https://www.fireconvertapp.com/mp3-to-ogg https://www.fireconvertapp.com/og/tools/mp3-to-ogg.png MP3 to OGG — convert with FireConvertApp Open-format audio for the web. https://www.fireconvertapp.com/wav-to-mp3 https://www.fireconvertapp.com/og/tools/wav-to-mp3.png WAV to MP3 — convert with FireConvertApp Uncompressed → portable. 90% smaller, no sign-up. https://www.fireconvertapp.com/flac-to-mp3 https://www.fireconvertapp.com/og/tools/flac-to-mp3.png FLAC to MP3 — convert with FireConvertApp Lossless library → MP3 for the car + phone. https://www.fireconvertapp.com/aac-to-mp3 https://www.fireconvertapp.com/og/tools/aac-to-mp3.png AAC to MP3 — convert with FireConvertApp Apple Music / iTunes AAC → universal MP3. https://www.fireconvertapp.com/mp3-to-wav https://www.fireconvertapp.com/og/tools/mp3-to-wav.png MP3 to WAV — convert with FireConvertApp Uncompressed PCM for editing + mastering. https://www.fireconvertapp.com/video-to-gif https://www.fireconvertapp.com/og/tools/video-to-gif.png Video to GIF — convert with FireConvertApp Short clips, shareable anywhere. https://www.fireconvertapp.com/mp4-to-gif https://www.fireconvertapp.com/og/tools/mp4-to-gif.png MP4 to GIF — convert with FireConvertApp Snip a loop from any MP4. https://www.fireconvertapp.com/gif-to-mp4 https://www.fireconvertapp.com/og/tools/gif-to-mp4.png GIF to MP4 — convert with FireConvertApp Cut file size 10x by switching to MP4. https://www.fireconvertapp.com/webm-to-gif https://www.fireconvertapp.com/og/tools/webm-to-gif.png WEBM to GIF — convert with FireConvertApp Screen recordings → shareable GIFs. https://www.fireconvertapp.com/mov-to-gif https://www.fireconvertapp.com/og/tools/mov-to-gif.png MOV to GIF — convert with FireConvertApp Apple screen recordings → GIF. https://www.fireconvertapp.com/avi-to-gif https://www.fireconvertapp.com/og/tools/avi-to-gif.png AVI to GIF — convert with FireConvertApp Legacy video → modern share format. https://www.fireconvertapp.com/apng-to-gif https://www.fireconvertapp.com/og/tools/apng-to-gif.png APNG to GIF — convert with FireConvertApp Universal browser support. https://www.fireconvertapp.com/gif-to-apng https://www.fireconvertapp.com/og/tools/gif-to-apng.png GIF to APNG — convert with FireConvertApp True color, no palette limits. https://www.fireconvertapp.com/unit-converter https://www.fireconvertapp.com/og/tools/unit-converter.png Unit Converter — convert with FireConvertApp Instant conversions. No network round-trip. https://www.fireconvertapp.com/time-converter https://www.fireconvertapp.com/og/tools/time-converter.png Time Converter — convert with FireConvertApp Compare any zone to any other. https://www.fireconvertapp.com/csv-to-json https://www.fireconvertapp.com/og/tools/csv-to-json.png CSV to JSON — convert with FireConvertApp Header-aware parser, nested output, no sign-up. https://www.fireconvertapp.com/json-to-csv https://www.fireconvertapp.com/og/tools/json-to-csv.png JSON to CSV — convert with FireConvertApp Array of objects → spreadsheet-ready CSV. https://www.fireconvertapp.com/xml-to-json https://www.fireconvertapp.com/og/tools/xml-to-json.png XML to JSON — convert with FireConvertApp Attributes preserved. Valid, nested JSON out. https://www.fireconvertapp.com/yaml-to-json https://www.fireconvertapp.com/og/tools/yaml-to-json.png YAML to JSON — convert with FireConvertApp Kubernetes configs, CI files, any YAML → JSON. https://www.fireconvertapp.com/json-to-yaml https://www.fireconvertapp.com/og/tools/json-to-yaml.png JSON to YAML — convert with FireConvertApp Human-readable config from machine-readable data. https://www.fireconvertapp.com/blog/crop-image-online-free https://www.fireconvertapp.com/og/tools/crop-image.png Crop image online free — aspect ratios, social media presets, batch workflow Cropping isn't one decision — it's three: aspect ratio (1:1, 4:3, 16:9, 4:5, 9:16), pixel-vs-percentage, destructive vs non-destructive. Each platform demands a specific size: Instagram 1:1, YouTube t https://www.fireconvertapp.com/blog/convert-avif-to-jpg https://www.fireconvertapp.com/og/tools/avif-to-jpg.png Convert AVIF to JPG — what it is, why sites serve it, and the legacy-tool problem Save Image As gave you a .avif file. Photoshop won't open it (until CC 24+), Word won't embed it, your CMS rejects it. AVIF is the AV1-based image format Chrome/Firefox/Safari all serve in 2026 — 40-5 https://www.fireconvertapp.com/blog/convert-svg-to-png https://www.fireconvertapp.com/og/tools/svg-to-png.png Convert SVG to PNG — vector to pixels, DPI, and the file-size scaling law SVG is vectors — infinite resolution at zero file size. PNG is pixels — fixed resolution, file size scales with width × height. Converting at 1024px gives one PNG; converting at 4096px gives a PNG 16× https://www.fireconvertapp.com/blog/convert-pdf-to-excel https://www.fireconvertapp.com/og/tools/pdf-to-jpg.png Convert PDF to Excel — table detection, OCR for scans, and the merged-cell trap PDF tables don't have row/column metadata — they're just lines and text positioned on a page. Extraction is heuristic, and the heuristics break on merged cells, multi-line headers, scanned PDFs (need https://www.fireconvertapp.com/blog/how-to-ocr-pdf https://www.fireconvertapp.com/og/tools/pdf-compressor.png How to OCR a PDF — make a scanned PDF searchable, accurately OCR (Optical Character Recognition) reads pixels and writes text. The accuracy floor is determined by DPI: 72 dpi is a coin flip, 150 dpi is decent, 300+ dpi is what every guide recommends, 600 dpi is https://www.fireconvertapp.com/blog/password-protect-pdf https://www.fireconvertapp.com/og/tools/pdf-compressor.png Password protect a PDF — what encryption can and can't actually stop Password-protected PDFs feel secure. They're not, exactly. AES-128 and AES-256 encryption stop casual access but a screen capture + OCR defeats the protection in seconds. The user vs owner password di https://www.fireconvertapp.com/blog/convert-heic-to-jpg-on-windows-11 https://www.fireconvertapp.com/og/tools/heic-to-jpg.png Convert HEIC to JPG on Windows 11 — without paying $0.99 for the extension Windows 11 still doesn't open HEIC files natively. The Microsoft Store fix is a $0.99 HEIF Image Extensions install. Or you can drop the iPhone export into a browser and convert without installing any https://www.fireconvertapp.com/blog/convert-png-to-pdf-multiple-images https://www.fireconvertapp.com/og/tools/png-to-pdf.png Convert multiple PNGs to one PDF — page size, margins, lossless embed Combining PNG screenshots, scans, or photos into a single PDF for sharing or printing. Page size matters (Letter / A4 / Auto), so does margin vs fit-to-page, and so does whether the PNG is embedded lo https://www.fireconvertapp.com/blog/convert-jpg-to-png-with-transparency https://www.fireconvertapp.com/og/tools/jpg-to-png.png Convert JPG to PNG with transparency — why it doesn't work the way you think JPG can't carry transparency. So when you "convert JPG to PNG with transparency," you actually need TWO operations: convert the format AND remove the background. Most online converters do only the fir https://www.fireconvertapp.com/blog/what-is-heic-format https://www.fireconvertapp.com/og/tools/heic-to-jpg.png What is HEIC? Apple's image format, the compatibility cost, and when to convert HEIC is what your iPhone shoots by default since 2017 — Apple's brand for HEIF container with HEVC codec. It's about 50% smaller than JPG at matched quality, supports 10-bit color, embeds Live Photos, https://www.fireconvertapp.com/blog/what-is-webp-format https://www.fireconvertapp.com/og/tools/webp-to-jpg.png What is WebP? Google's image format, lossy and lossless, and the WebP-to-JPG question WebP is Google's 2010 image format — VP8-derived for lossy mode, VP8L for lossless, alpha transparency support, animated WebP as a GIF replacement. Same .webp extension hides two completely different https://www.fireconvertapp.com/blog/what-is-avif-format https://www.fireconvertapp.com/og/tools/avif-to-jpg.png What is AVIF? The AV1-based image format, royalty-free, and the future of web images AVIF is the AV1 Image File Format — the still-image cousin of the AV1 video codec, royalty-free (unlike HEIC), 40-50% smaller than JPG at matched quality. Browser support: Chrome 85+, Firefox 86+, Saf https://www.fireconvertapp.com/blog/convert-rtf-to-pdf https://www.fireconvertapp.com/og/tools/docx-to-pdf.png Convert RTF to PDF — the legacy format that survived Word, the web, and time RTF is Microsoft's 1987 Rich Text Format — plain-text-with-formatting that every text editor on every operating system can read. Email attachments, government forms, legal docs, and academic papers st https://www.fireconvertapp.com/blog/convert-odt-to-docx https://www.fireconvertapp.com/og/tools/docx-to-pdf.png Convert ODT to DOCX — LibreOffice meets Microsoft Word, fidelity tradeoffs ODT is OpenDocument Text — LibreOffice and OpenOffice's native format. DOCX is Microsoft Word. Both descend from XML standards but the rendering engines disagree on subtleties: font metrics, table cel https://www.fireconvertapp.com/blog/convert-epub-to-mobi https://www.fireconvertapp.com/og/tools/epub-to-pdf.png Convert EPUB to MOBI — send-to-Kindle, cover art, and the AZW3 alternative EPUB is the open ebook standard. MOBI is Amazon's older format (Kindle now prefers AZW3). Send-to-Kindle, sideload via USB, or email to your Kindle's custom address — all want MOBI or PDF. Here's the https://www.fireconvertapp.com/blog/convert-xlsx-to-csv https://www.fireconvertapp.com/og/tools/xlsx-to-csv.png Convert XLSX to CSV — multi-sheet workbooks, encoding, and the formula problem XLSX is a binary ZIP of XML — formulas, formatting, charts, multi-sheet workbooks. CSV is plain text — rows of values. Converting throws away most of the XLSX richness; what survives is the cell value https://www.fireconvertapp.com/blog/convert-csv-to-xlsx https://www.fireconvertapp.com/og/tools/csv-to-xlsx.png Convert CSV to XLSX — auto-typing pitfalls, ZIP codes, and large-file performance CSV is plain text. XLSX is structured. Excel auto-types every column on import: ZIP codes lose leading zeros, dates get mangled, scientific notation eats long IDs. The fix is to either disable auto-ty https://www.fireconvertapp.com/blog/convert-json-to-csv https://www.fireconvertapp.com/og/tools/json-to-csv.png Convert JSON to CSV — flat arrays, nested objects, and the flattening strategy Array-of-flat-objects JSON converts cleanly to CSV. Nested objects don't — they need a flattening strategy: dot-notation columns (user.name, user.email), JSON-as-cell, or split into multiple CSVs. Her https://www.fireconvertapp.com/blog/convert-markdown-to-html https://www.fireconvertapp.com/og/tools/md-to-html.png Convert Markdown to HTML — flavors, tables, and the YAML front-matter case Markdown isn't one language — it's a family. CommonMark is the strict standard, GFM (GitHub Flavored) adds tables and task lists, Pandoc-flavored adds footnotes and citations. Each renders the same .m https://www.fireconvertapp.com/blog/convert-yaml-to-json https://www.fireconvertapp.com/og/tools/yaml-to-json.png Convert YAML to JSON — comments, the Norway problem, and developer config files YAML adds comments and indentation-sensitive syntax to JSON. Devs use it for config (Kubernetes, GitHub Actions, Docker Compose). Converting to JSON loses the comments and gains parser strictness. Her https://www.fireconvertapp.com/blog/convert-xml-to-json https://www.fireconvertapp.com/og/tools/xml-to-json.png Convert XML to JSON — attributes, namespaces, CDATA, and the round-trip problem XML carries semantic weight JSON can't represent: attributes vs elements, namespaces, CDATA sections, mixed content. Converting is lossy unless you adopt conventions (e.g., '@' prefix for attributes, https://www.fireconvertapp.com/blog/convert-cr2-to-jpg https://www.fireconvertapp.com/og/tools/cr2-to-jpg.png Convert CR2 to JPG — Canon's RAW format, embedded previews, and full demosaic CR2 is Canon's pre-2018 RAW format. The file holds unprocessed sensor data plus an embedded JPEG preview. Two paths to JPG: extract the embedded preview (instant, low-res) or fully demosaic the RAW da https://www.fireconvertapp.com/blog/convert-nef-to-jpg https://www.fireconvertapp.com/og/tools/nef-to-jpg.png Convert NEF to JPG — Nikon's RAW format, 12-bit vs 14-bit, and lossless compression NEF is Nikon Electronic Format — Nikon's RAW. Variants exist (12-bit vs 14-bit, lossy vs lossless compressed) and they affect file size + dynamic range. Here's the honest version: the NEF variants, in https://www.fireconvertapp.com/blog/best-free-pdf-tools-2026 https://www.fireconvertapp.com/og/tools/pdf-compressor.png Best free PDF tools in 2026 — an honest scorecard Most "best free PDF" lists rank by ad budget, not by what actually works. Here's an honest scorecard across iLovePDF, Smallpdf, PDF24, Adobe Acrobat free tier, and FireConvertApp — graded on free-tier https://www.fireconvertapp.com/blog/best-image-converters-2026 https://www.fireconvertapp.com/og/tools/compress-jpeg.png Best image converters in 2026 — a scorecard across 6 tools An honest roundup across Squoosh (Google's open-source, single-image), TinyPNG (smart-lossy compression king), CloudConvert (format breadth), XnConvert (offline desktop), online-convert.com (ad-heavy https://www.fireconvertapp.com/blog/instagram-image-sizes-2026 https://www.fireconvertapp.com/og/tools/resize-image.png Instagram image sizes 2026 — square, portrait, stories, reels Instagram in 2026 wants 1080×1080 square (still works), 1080×1350 4:5 portrait (best engagement), 1080×608 landscape, 1080×1920 stories + reels. Profile pic 320×320, IG carousel 1080×1080 or 1080×1350 https://www.fireconvertapp.com/blog/photographer-raw-to-web-workflow https://www.fireconvertapp.com/og/tools/compress-jpeg.png Photographer's RAW-to-web workflow — cull, edit, export, resize, compress, ship The end-to-end pipeline from camera card to a posted image: cull in Photo Mechanic / Lightroom, develop the RAW in Lightroom / Capture One / darktable, export full-quality JPG, resize for the destinat https://www.fireconvertapp.com/blog/podcaster-audio-workflow https://www.fireconvertapp.com/og/tools/wav-to-mp3.png Podcaster's audio workflow — record, master, export to MP3, upload From mic to RSS feed: record into Audacity / Reaper / Audition, edit + master + dialog-normalize, export full-quality WAV, convert to MP3 at the right bitrate (96 kbps mono for voice, 128 kbps stereo https://www.fireconvertapp.com/blog/remove-background-from-logo https://www.fireconvertapp.com/og/tools/remove-background.png Remove background from a logo — alpha precision, white-vs-transparent Logos have cleaner edges than photos so AI background removal works almost perfectly. The decisions: white background vs transparent (different output, different use cases), alpha-channel precision fo https://www.fireconvertapp.com/blog/convert-wav-to-mp3 https://www.fireconvertapp.com/og/tools/wav-to-mp3.png Convert WAV to MP3 — bitrate math, the "CD quality" myth, and when to stay uncompressed WAV is uncompressed PCM — every sample written out verbatim, which is why one minute is ~10 MB and a full album is half a gigabyte. MP3 throws most of those bytes away using psychoacoustic masking and https://www.fireconvertapp.com/blog/convert-flac-to-mp3 https://www.fireconvertapp.com/og/tools/flac-to-mp3.png Convert FLAC to MP3 — when to compress your lossless library (and when not to) FLAC is lossless compression — about 60% the size of WAV, bit-identical when decoded. That's perfect for archives and terrible for phone storage, car stereos, and devices that don't speak FLAC. Here's https://www.fireconvertapp.com/blog/convert-m4a-to-mp3 https://www.fireconvertapp.com/og/tools/aac-to-mp3.png Convert M4A to MP3 — the honest answer is usually "don't," but here's when you have to M4A is an MPEG-4 container holding AAC audio — and AAC is higher-quality-per-bit than MP3, so this conversion is a downgrade. Do it anyway when you need MP3 specifically: older car stereos, podcast ho https://www.fireconvertapp.com/blog/merge-pdf-files https://www.fireconvertapp.com/og/tools/pdf-merge.png Merge PDF files — order, bookmarks, form fields, and the file-size math Merging PDFs is not "staple and done." The real decisions — drag-to-reorder (page order is fixed at merge time), page-range selection (pull pages 1-3 from doc A and 5-7 from doc B), bookmark preservat https://www.fireconvertapp.com/blog/convert-tiff-to-jpg https://www.fireconvertapp.com/og/tools/tiff-to-jpg.png Convert TIFF to JPG — print-archival format meets the web TIFF is the workhorse of print, scanning, and archives: lossless, multi-page, flexible enough to hold LZW, JPEG-in-TIFF, or raw strips. JPG is the web's universal currency. The gap between them is 5-2 https://www.fireconvertapp.com/blog/remove-exif-metadata-from-photo https://www.fireconvertapp.com/og/tools/compress-jpeg.png Remove EXIF metadata from a photo — GPS, camera serial, and what platforms actually strip Every JPEG your phone takes is carrying a sidecar file you didn't ask for: GPS coordinates accurate to a few meters, the phone's serial number, the software version, the time to the second, and someti https://www.fireconvertapp.com/blog/convert-image-for-whatsapp https://www.fireconvertapp.com/og/tools/compress-jpeg.png Convert an image for WhatsApp — sweet-spot size, quality, and Document mode WhatsApp compresses every image you send. A 4 MB iPhone photo lands on the other side around 100 KB — fine for a meme, brutal for anything you care about. The fix is to compress and resize BEFORE you https://www.fireconvertapp.com/blog/convert-aac-to-mp3 https://www.fireconvertapp.com/og/tools/aac-to-mp3.png Convert AAC to MP3 — quality-per-bitrate, iTunes, and when compatibility wins AAC is objectively better per bit than MP3 — it's the codec AAC was literally designed to replace. So converting AAC to MP3 is a downgrade. You still do it constantly: a car stereo from 2009 rejects . https://www.fireconvertapp.com/blog/convert-mp3-to-wav https://www.fireconvertapp.com/og/tools/mp3-to-wav.png Convert MP3 to WAV — the counterintuitive direction, DAW imports, and file-size math Going from MP3 (lossy) to WAV (lossless container) does not restore quality. The encoder threw the missing frequencies away at encode time; decoding to WAV writes the same reduced signal into a file r https://www.fireconvertapp.com/blog/convert-avi-to-mp4 https://www.fireconvertapp.com/og/tools/mov-to-mp4.png Convert AVI to MP4 — when remux works, when re-encode is forced AVI is a 1992 Microsoft container, still stuffed into old archives, camcorder dumps, DivX downloads, and academic libraries. AVI to MP4 is occasionally a fast remux (if the codec is MP4-legal), but us https://www.fireconvertapp.com/blog/convert-wmv-to-mp4 https://www.fireconvertapp.com/og/tools/mov-to-mp4.png Convert WMV to MP4 — the Windows-legacy video escape hatch WMV is Windows Media Video. VC-1 codec inside an ASF container, Microsoft's answer to H.264 from the 2000s, still lurking in corporate training archives, screen recordings from old Camtasia, and TV re https://www.fireconvertapp.com/blog/convert-mkv-to-mp4 https://www.fireconvertapp.com/og/tools/mov-to-mp4.png Convert MKV to MP4 — container swap, subtitles, and multi-audio reality MKV and MP4 are both containers. Most of the time, "convert MKV to MP4" is a remux — a container swap — not a re-encode. That means lossless, near-instant, bit-for-bit identical video. The exceptions https://www.fireconvertapp.com/blog/compress-video-for-email https://www.fireconvertapp.com/og/tools/mov-to-mp4.png Compress video for email — hit Gmail's 25 MB cap without wrecking quality Gmail caps attachments at 25 MB. Outlook at 20 MB. Slack 100 MB. WhatsApp 100 MB. Most "compress video" tutorials tell you to just lower quality and pray. The real answer is three levers — resolution, https://www.fireconvertapp.com/blog/why-heic-shows-gray-on-windows https://www.fireconvertapp.com/og/tools/heic-to-jpg.png Why HEIC photos show as gray thumbnails on Windows (and 3 honest fixes) You plugged in the iPhone, copied the photos, and File Explorer is showing plain gray tiles where the images should be. You didn't do anything wrong — Windows 11 ships without a HEIF decoder, and HEIC https://www.fireconvertapp.com/blog/pdf-too-large-to-email https://www.fireconvertapp.com/og/tools/pdf-compressor.png PDF too large to email — attachment limits, diagnosis, and honest fixes Gmail said "exceeds attachment size limit." Outlook bounced it. The job portal wants it under 5 MB and yours is 18. You don't need a compression lecture — you need the file through. Here's the real at https://www.fireconvertapp.com/blog/avif-vs-webp-vs-jpeg https://www.fireconvertapp.com/og/tools/jpg-to-webp.png AVIF vs WebP vs JPEG — matched-quality size, encoder speed, and browser support in 2026 AVIF is the newest, WebP is the safe middle, JPEG is the universal fallback. At matched visual quality (SSIM 0.98), AVIF lands ~50% smaller than JPEG and ~20% smaller than WebP — but encode time is 10 https://www.fireconvertapp.com/blog/png-vs-jpg-when-to-use-each https://www.fireconvertapp.com/og/tools/png-to-jpg.png PNG vs JPG — a decision tree, file-size math, and when each wins PNG is lossless with alpha. JPG is lossy without. That one sentence decides 90% of the choice, and the remaining 10% is where every tutorial gets sloppy. Here's the honest decision tree (photo → JPG, https://www.fireconvertapp.com/blog/mp4-vs-mov-vs-webm https://www.fireconvertapp.com/og/tools/mov-to-mp4.png MP4 vs MOV vs WebM — container vs codec, compatibility, and the right pick MP4, MOV, and WebM are not codecs. They're containers — wrappers that hold a video codec, an audio codec, and metadata. The codec decides quality and file size; the container decides which players and https://www.fireconvertapp.com/blog/extract-audio-from-video https://www.fireconvertapp.com/og/tools/mp4-to-mp3.png Extract audio from video — extract vs convert, bitrates, and multi-track MP4s "Extract audio from video" and "convert MP4 to MP3" are not the same operation. If the source is already AAC, a stream-copy extract is lossless and near-instant; re-encoding to MP3 is a small quality https://www.fireconvertapp.com/blog/convert-word-to-pdf https://www.fireconvertapp.com/og/tools/docx-to-pdf.png Convert Word to PDF — fonts, tables, tracked changes, and PDF/A "Save as PDF" looks like a button. It's a pipeline — font embedding, table reflow, header/footer handling, tracked-changes decisions, and (for archival submissions) a PDF/A flag most online converters https://www.fireconvertapp.com/blog/resize-image-without-losing-quality https://www.fireconvertapp.com/og/tools/resize-image.png Resize an image — aspect ratio, fit modes, and the math nobody explains Resizing an image looks like one slider. It isn't. There's an aspect-ratio decision, a fit-mode decision (cover vs contain vs fill vs inside), a resampling-algorithm decision, a should-I-compress-afte https://www.fireconvertapp.com/blog/reduce-pdf-file-size https://www.fireconvertapp.com/og/tools/pdf-compressor.png Reduce PDF file size — when your PDF is too large to send Gmail bounced your attachment. The job portal said "file too large." The insurance form rejected a 14 MB scan. You don't need a lecture on DCT coefficients — you need the file under the limit, now. He https://www.fireconvertapp.com/blog/compress-jpeg-without-losing-quality https://www.fireconvertapp.com/og/tools/compress-jpeg.png Compress JPEG without losing quality — the honest guide Every "compress image" tutorial ends with "set quality to 80 and you're done." It's the lazy answer. Quality is a curve — q=95 costs three times more bytes than q=85 for identical output — and chroma https://www.fireconvertapp.com/blog/convert-heic-to-png https://www.fireconvertapp.com/og/tools/heic-to-png.png Convert HEIC to PNG — the Windows-friendly, lossless way Windows can't open HEIC without a paid Microsoft Store extension. PNG can. This is the honest guide: why PNG instead of JPG, why the PNG comes out 3-8x larger than the HEIC (arithmetic, not a bug), Wi https://www.fireconvertapp.com/blog/convert-webp-to-jpg https://www.fireconvertapp.com/og/tools/webp-to-jpg.png Convert WebP to JPG — lossy vs lossless, transparency, and when not to The blue W icon hides two totally different codecs — lossy (VP8) and lossless (VP8L) — and which one your file uses decides whether the JPG is a quarter the size, the same size, or bigger. Add transpa https://www.fireconvertapp.com/blog/convert-jpg-to-pdf https://www.fireconvertapp.com/og/tools/jpg-to-pdf.png Convert JPG to PDF — page size, margins, and the decisions that actually matter Every JPG-to-PDF tutorial on the internet is four sentences of filler. The real decisions — Letter vs A4 vs Auto, fit-to-page vs margins, embed vs re-encode, DPI for print, and why your PDF is somehow https://www.fireconvertapp.com/blog/convert-mov-to-mp4 https://www.fireconvertapp.com/og/tools/mov-to-mp4.png Convert MOV to MP4 — fast remux, honest re-encode (when you need it) Nine times out of ten, MOV to MP4 is a container swap — the video inside is already H.264 or HEVC and you just need the wrapper renamed. That should take seconds. Here's why most tools re-encode anywa https://www.fireconvertapp.com/blog/convert-png-to-jpg https://www.fireconvertapp.com/og/tools/png-to-jpg.png Convert PNG to JPG — the honest guide (quality, transparency, batch) PNG to JPG looks trivial — two formats, one conversion. It isn't, quite. You trade transparency for file size, lossless for lossy, and can quietly wreck a screenshot with the wrong defaults. Here's wh https://www.fireconvertapp.com/blog/upscale-image-without-losing-quality https://www.fireconvertapp.com/og/tools/upscale-image.png Upscale an image without losing quality — AI, in your browser, free Topaz Gigapixel is $99. Adobe's Super Resolution needs Creative Cloud. We've shipped the same class of neural upscaler in your browser — 2× or 4×, unlimited, no upload. Here's how it works and where i https://www.fireconvertapp.com/blog/remove-background-from-image-for-free https://www.fireconvertapp.com/og/tools/remove-background.png Remove background from image — free, no sign-up, runs in your browser remove.bg charges $9–$99/month. PhotoRoom charges $9.99. Canva Pro is $14.99. We've run the same AI model in your browser — free, private, unlimited, no upload. Here's how, and where it's as good (or https://www.fireconvertapp.com/blog/mp4-to-mp3-in-your-browser https://www.fireconvertapp.com/og/tools/mp4-to-mp3.png MP4 to MP3 in your browser — no upload, no watermark Most MP4-to-MP3 sites upload your video to their servers, watermark the audio, or both. This one runs ffmpeg in your browser — the file never leaves your machine. Here's why that matters and how to ge https://www.fireconvertapp.com/blog/how-to-actually-compress-a-pdf https://www.fireconvertapp.com/og/tools/pdf-compressor.png How to actually compress a PDF (and why most tools can't) Most "PDF compressors" hand you back a file the same size or larger. The reason: they can only re-save the wrapper, not re-encode the embedded images. Here's what actually works. https://www.fireconvertapp.com/blog/convert-heic-to-jpg-without-losing-quality https://www.fireconvertapp.com/og/tools/heic-to-jpg.png How to convert HEIC to JPG without losing quality HEIC is Apple's smart default for iPhone photos — but it won't open on most Windows apps, Android phones, or older browsers. Here's how to convert without the quality tax. https://www.fireconvertapp.com/compare/remove-bg https://www.fireconvertapp.com/og/compare/remove-bg.png FireConvertApp vs remove-bg Honest head-to-head comparison. https://www.fireconvertapp.com/compare/ilovepdf https://www.fireconvertapp.com/og/compare/ilovepdf.png FireConvertApp vs ilovepdf Honest head-to-head comparison. https://www.fireconvertapp.com/compare/smallpdf https://www.fireconvertapp.com/og/compare/smallpdf.png FireConvertApp vs smallpdf Honest head-to-head comparison. https://www.fireconvertapp.com/compare/cloudconvert https://www.fireconvertapp.com/og/compare/cloudconvert.png FireConvertApp vs cloudconvert Honest head-to-head comparison. https://www.fireconvertapp.com/compare/zamzar https://www.fireconvertapp.com/og/compare/zamzar.png FireConvertApp vs zamzar Honest head-to-head comparison. https://www.fireconvertapp.com/compare/convertio https://www.fireconvertapp.com/og/compare/convertio.png FireConvertApp vs convertio Honest head-to-head comparison. https://www.fireconvertapp.com/compare/adobe-acrobat https://www.fireconvertapp.com/og/compare/adobe-acrobat.png FireConvertApp vs adobe-acrobat Honest head-to-head comparison. https://www.fireconvertapp.com/compare/online-convert https://www.fireconvertapp.com/og/compare/online-convert.png FireConvertApp vs online-convert Honest head-to-head comparison. https://www.fireconvertapp.com/compare/squoosh https://www.fireconvertapp.com/og/compare/squoosh.png FireConvertApp vs squoosh Honest head-to-head comparison. https://www.fireconvertapp.com/compare/tinypng https://www.fireconvertapp.com/og/compare/tinypng.png FireConvertApp vs tinypng Honest head-to-head comparison. https://www.fireconvertapp.com/compare/pdf24 https://www.fireconvertapp.com/og/compare/pdf24.png FireConvertApp vs pdf24 Honest head-to-head comparison. https://www.fireconvertapp.com/compare/xnconvert https://www.fireconvertapp.com/og/compare/xnconvert.png FireConvertApp vs xnconvert Honest head-to-head comparison.