Browser-only video tools.
No upload.
26 free FFmpeg.wasm tools for compressing, converting, trimming, and editing video — running entirely on your device. Plus 100+ command recipes if you want to learn the CLI.
Pick by goal Start from "what do I want to do?"
Popular tools Most-used free tools
Compress video to H.264. Choose from High Quality, Balanced, or Small Size with a quality selector.
Use this tool →Auto-compress video to fit Discord's upload cap (10MB/25MB/50MB/500MB). Bitrate math is handled for you.
Use this tool →Set start, end, width, and FPS to convert any video clip to an animated GIF. Preview and download.
Use this tool →Extract MP3, WAV, or AAC from any video. Listen in the browser and download — no upload needed.
Use this tool →Resize & crop video to any SNS format: TikTok, YouTube Shorts, Reels, Instagram, YouTube, X. Live crop preview. Browser-only, no upload.
Use this tool →Extract JPEG frames at any timestamp. Multi-frame support, JPEG quality, and output size options.
Use this tool →Beginner walkthrough Try them in this order
Reference articles FFmpeg command reference, by purpose
Latest articles FFmpeg command walkthroughs
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iPhone Video Won't Play on Windows? Fix HEVC, Black Screen, and Sideways Videos
iPhone videos often fail to play on Windows PCs — codec errors, audio-only playback, or portrait videos rotated sideways. Learn the three common causes (HEVC, hvc1/hev1 tagging, rotation metadata) and fix them in your browser or with one FFmpeg command.
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How to Check and Remove GPS Location from a Video — Complete Privacy Guide
iPhone and Android cameras embed GPS coordinates in every video. This guide shows you how to inspect what's actually in your file (exiftool, ffprobe, browser tools) and how to strip the location, timestamp, and camera info before posting to social — losslessly.
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CloudConvert Alternative — Convert Video Without Uploading It
CloudConvert is a powerful conversion service, but it requires uploading your file. FFmpeg Cookbook converts video and audio entirely in your browser — no upload, no account, no API quota. Compare formats, limits, and privacy trade-offs.
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HandBrake Alternative — Compress Video Online Without Installing
Compare HandBrake with FFmpeg Cookbook's browser-based video compressor. Same H.264/H.265 quality, no install, no upload, free forever — plus learn the equivalent FFmpeg commands behind every setting.
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VEED.io Alternative — No Watermark, No Signup, No Upload
VEED.io is great until you hit the watermark, signup wall, or upload wait. FFmpeg Cookbook is a free browser-based alternative for subtitles, watermarks, and mosaic blur — running entirely on your device, with no account required.
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Add Background Music with FFmpeg ? amix BGM Guide
How to add BGM to a video with FFmpeg. Covers amix mixing, volume balance, length adjustment (apad/aloop), fade in/out, and auto-ducking with copy-paste commands and primary sources.
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Change Video Speed with FFmpeg ? Audio Sync Guide
Speed up or slow down video with FFmpeg using setpts and atempo. Covers 0.25x–10x ratios, audio-sync without drift, pitch-preserving rubberband, variable-speed sections, and smooth slow-mo via minterpolate.
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Remove Black Bars with FFmpeg ? cropdetect Guide
Auto-detect black bars with FFmpeg cropdetect, then strip them with the crop filter. Covers letterbox, pillarbox, even-dimension fixes, non-pure-black bars, and the reverse pad workflow.
Quality & privacy Editorially reviewed before publishing
- Local processingVideo / audio tools run in your browser — files stay on-device.
- Primary sourcesArticles cite the official FFmpeg docs and verify against real builds.
- Plain EnglishBeginner-friendly walkthroughs paired with command examples.
- Equivalent CLI commandsEvery tool shows the FFmpeg command it runs internally.