XL Converter

XL Converter is a powerful image converter.

Downloads

Version 1.0.0 (2024-05-16)

Windows

Windows 10 or 11

Linux

Kernel 5.15 or later
fuse installed

Installer: Unpack then run ./install.sh

Donate

Support the developer with a small donation.

Features

Batch convert to JPEG XL, AVIF, WEBP, and JPG.

JPEGLI

Encode regular JPGs with the highest quality encoder.

JPG -> JPEG XL -> JPG

Compress JPGs losslessly then reconstruct them when needed.

Scale down your images.

HEIF -> AVIF

Seamless encoding with Image Proxy.

Resources

Docs

Learn how to best use XL Converter.

Source

XL Converter is free and open-source (GPLv3)

Misc.

Upvote XL Converter on AlternativeTo to help it get discovered by more people.

Looking to Hire a Programmer?

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Screenshots

Widely Used

Featured on the supported_software list in the official JPEG XL repository.

Listed on jpegxl.info

Used by hundreds of people.

Full Feature List

  • Conversion
    • Batch conversion to JPEG XL, AVIF, WEBP, JPG and PNG
    • Conversion from HEIF
    • JPG Reconstruction
    • Fast paralleled encoding
    • Top quality JPG (JPEGLI)
    • Top quality AVIF (AOM-AV1)
    • Keep folder structure
    • Easy metadata handling
    • Scaling to resolution, shorter (or longer) side, and file size
    • All scaling preserves the aspect ratio
    • Format-independent downscaling to file size
    • Smallest Lossless (OxiPNG vs WEBP vs JPEG XL)
  • User Experience
    • Clean interface
    • Drag ‘n drop
    • Dark theme
    • Good defaults
    • Lightweight Qt-based GUI
  • Quality of Life
    • Privacy-focused – only local conversion. File names and contents stay secret
    • No internet connection required
    • Open-source and 100% free (even for commercial use)
    • No ads, no telemetry, no annoyances
    • Works out of the box