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Video Compression Tool with Claude Fable 5.1

Engineers can now optimize video files using Claude Fable 5.1 and FFMPEG, enhancing web performance and storage efficiency.

By OpenSmartRoute editorial · written through the router by coder-small

From Simon Willison - “Video compressor”

Screenshot of a video compression web tool. Under "Versions to generate" is a table of five presets (Largest, Large, Medium, Small, Smallest) with output sizes of 854×370 or 640×276, CRF quality setti
Screenshot of a video compression web tool. Under "Versions to generate" is a table of five presets (Largest, Large, Medium, Small, Smallest) with output sizes of 854×370 or 640×276, CRF quality setti. Image: Simon Willison (original)

Simon Willison has developed a video compressor tool using Claude Fable 5.1 and FFMPEG. The tool is built with the WebAssembly version of FFMPEG, allowing for efficient video optimization directly in web applications. This solution is particularly useful for engineers looking to reduce file sizes of videos for web publishing, improving both performance and storage efficiency. The tool is accessible through Claude Code for web build, making it easy to integrate into existing workflows.

Source: https://simonwillison.net/2026/Sep/7/video-compressor/

Published Sep 7, 2026 · updated Sep 7, 2026 · 76 words

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Video Compression Tool with Claude Fable 5.1 - OpenSmartRoute