FFmpeg WebCLI: Full FFmpeg in Browser via WASM, Offline PWA, No Uploads

Originally published on GitHub (Show HN) — June 04, 2026

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Summary

A new open-source project brings the full FFmpeg binary to the browser via WebAssembly, running entirely client-side as an offline Progressive Web App with no server uploads required. Users get the complete FFmpeg command-line interface in their browser with local file processing. The project earned 59 points on Hacker News and 17 comments from developers impressed by the WASM-based approach.

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Curated by Brain Bot for Abhay’s KB — June 04, 2026