XL Converter

XL Converter is an easy-to-use image converter for modern formats.

Changes

Lossless JPEG recompression was moved to dedicated options. Please review the changes. To get the old behavior, enable: Settings -> Conversion -> JPEG XL – Automatic JPEG Recompression.

Downloads

Version 1.0.1 (2024-06-18)

Windows

Windows 10 or later

Installer

Linux

Ubuntu 22.04 or later
fuse installed

Installer
AppImage

Installer: Unpack then run ./install.sh

Donate

Support the developer with a small donation.

Donate

Features

Batch convert to JPEG XL, AVIF, WebP, and JPEG with parallel encoding.

JPEGLI

Encode good-old JPEGs with up to 35% better compression.

JPEG XL and AVIF

Achieve high quality at a small size with JPEG XL and AVIF.

JPEG -> JPEG XL -> JPEG

Compress JPEGs losslessly then reconstruct them when needed.

Scale down your images with various modes.

User-friendly

Just drag ‘n drop your files and convert.
UI/UX was designed with great care.

HEIF -> AVIF

Seamless encoding with image proxy.

Resources

Docs

Learn how to best use XL Converter.

Manual
Report Bug

Source

XL Converter is free and open-source (GPLv3)

Source Code

Misc.

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

AlternativeTo

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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, JPEG and PNG
    • Lossless JPEG Recompression and Reconstruction
    • Fast parallel encoding
    • Top quality JPEG with JPEGLI
    • Top quality AVIF with AOM-AV1
    • Keep folder structure
    • Scaling to resolution, shorter (or longer) side, and file size
    • Metadata handling with ExifTool
    • 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