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FFmpeg in the browser with WebAssembly v1.0.0

Use this resource to transcode a video in the browser with ffmpeg.wasm

New

  • 545 downloads
  • 144 likes
  • 218 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install ffmpeg-wasm-browser

With no option, the skill goes to ~/.agents/skills/; add --agent claude-code (or codex, cursor…) to target an agent.

First time: connect the CLI with

npx --yes palatekit@latest login

The agent integrates ffmpeg.wasm into a React, Vue or Next.js app, sets the COOP and COEP headers needed for multithreading and tracks progress. It flags memory and size limits. You get initialization code and conversion recipes.

Mostly picked by

Updated November 2, 2026

Card for the “FFmpeg in the browser with WebAssembly” skill

Details

Works in
Install guides
Generates with
Your agent's model
Licence
MIT

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What you get

  • SKILL.md: installation, loading and basic use
  • SKILL.md: COOP and COEP headers and the multithreaded build
  • SKILL.md: Cloudflare Workers limits and memory cleanup

Good fit for

  • You want to convert a video without sending it to a server
  • Your app must show the progress of an encode

Not for

    Tags

    • ffmpeg.wasm
    • webassembly
    • browser
    • coop coep

    About

    You say

    “Add a button to my React app that converts a video to MP4 in the browser, with a progress bar.”

    Card for the “FFmpeg in the browser with WebAssembly” skill

    Skill published by josiahsiegel under the MIT license, delivered in its original version.

    Show more

    How to use it

    1. Install the skill in your agent's skills folder
    2. Ask your agent to transcode a video in the browser with ffmpeg.wasm
    3. Review and adjust the result

    Content preview

    Files

    • LICENSE1.1 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • SKILL.md14.9 KB

    Origin and licence

    Listed unmodified

    Author
    josiahsiegel
    Source
    github.com/josiahsiegel/claude-plugin-marketplace/tree/5a1b1123b9e50aa9a66a61005ca6fe012cc7442d/plugins/ffmpeg-platforms/skills/ffmpeg-webassembly-workers
    Licence
    MIT

    Notice

    « ffmpeg-webassembly-workers » (josiahsiegel, MIT) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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