Show HN: FFmpeg WebCLI – Full FFmpeg in Browser, Offline PWA, No Uploads(WASM)

A browser-based video editor powered by ffmpeg.wasm. No uploads, no servers -- all processing happens locally in your browser using Web Assembly.

🚀 Live app: https://tejaswigowda.com/ffmpeg-web CLI/

✅ No Server Uploads — All video processing happens entirely on your device ✅ 30+ Video Operations — GIF creation, format conversion, compression, trimming, effects, filters, and more ✅ Offline-First PWA — Works completely offline after first use; install as a native app ✅ Screen Wake Lock — Screen stays active during video processing on any device ✅ Live Previews — See output size estimates and live settings adjustments ✅ Multi-Format Support — MP4, WebM, MKV, MOV, AVI, GIF, MP3, AAC, WAV, OGG, FLAC, JPG, PNG ✅ Advanced Features — Raw ffmpeg command access, subtitle embedding, concatenation, picture-in-picture, audio mixing ✅ Fast & Responsive — Uses Web Workers for background processing ✅ Privacy First — Zero data collection; works with your files locally Use Cases 🎞 GIF Maker Convert any video clip into an animated GIF. Set the frame rate and output width; height scales automatically to preserve the aspect ratio. Uses a two-pass palette generation for the best possible color quality.