// Browser-based video tools

VIDEO TOOLS
THAT NEVER
UPLOAD YOUR FILES

Single-purpose tools, each one a thin UI over FFmpeg WebAssembly. Drop a file in, get a result back — without it ever leaving the browser tab you are reading this in. Free, no signup, no limits beyond your own machine.

• MP4 Converter

  MP4 Converter

  MP4 ↔ MKV, MOV, AVI — stream-copy fast, lossless

  Convert between MP4, MKV, MOV, AVI and more. Stream-copy when possible (instant, lossless), or pass custom FFmpeg arguments for full control over codec, bitrate, and resolution. No upload.

  Open tool →
• Compress for WhatsApp

  Video Compressor

  Shrink MP4 to fit WhatsApp / Discord / email limits

  Compress an MP4 to a target file size — WhatsApp 16 MB, Discord 25 MB, custom — without uploading. Single-pass H.264, target-size or CRF-quality modes.

  Open tool →
• MOV → MP4

  MOV to MP4 Converter

  iPhone MOV / QuickTime → MP4, lossless stream copy

  Convert MOV (QuickTime, iPhone) to MP4 in seconds. Default stream copy keeps quality identical; optional re-encode for older devices.

  Open tool →
• Video → GIF

  Video to GIF Converter

  Two-pass palette generation, sharper colour than the competition

  Turn an MP4, MOV, MKV, or WebM clip into an animated GIF directly in your browser. Two-pass palette generation for sharper colour. No upload.

  Open tool →

// Why these tools exist

Local processing, real FFmpeg

Most "free online video tools" are wrappers around an upload form. You hand your file to a stranger's server, wait while they process it, and download whatever comes back. The business model is paid storage or — more often — ads against your attention while you sit through the upload. Your file ends up on someone else's disk for as long as their privacy policy allows, which is usually longer than you think.

The tools here use the same FFmpeg that powers VLC, Chrome's video playback, OBS, and most of the production video pipelines on the open web — compiled to WebAssembly so it runs inside your browser instead of on a server. The first time you visit, the browser downloads the engine once (about thirty megabytes) and caches it. After that, every conversion happens locally on your machine. You can verify this in your browser's Network tab: open it, run a conversion, watch nothing leave.

Each tool is single-purpose. The video converter moves files between MP4, MKV, MOV, and AVI — usually as a stream-copy (instant, lossless, container-only). The video-to-GIF tool runs a two-pass palette pipeline for sharper colour than most single-pass GIF encoders. More tools land at /tools as they ship. If you want a tour of how the engine itself works, the FFmpeg explainer on the blog is a good starting point.