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Dev.to
6/25/2026
I built a private, 100% in-browser JPEG XL converter (no upload, no server)

I built a private, 100% in-browser JPEG XL converter (no upload, no server)

Short summary

Developer built a 100% in-browser image converter using WebAssembly that converts between JPEG, PNG, WebP, GIF, HEIC, and JPEG XL formats without server uploads. The tool runs entirely on the client using WASM-compiled libjxl and native browser APIs. Available open-source at jpegxlconvert.com with multi-language support.

  • •Client-side image converter using WebAssembly for privacy
  • •Supports JPEG, PNG, WebP, GIF, HEIC, and JPEG XL formats
  • •Open-source, multilingual, no backend required

Generated with AI, which can make mistakes.

#open-source#product-launch
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