XL Converter is a powerful image converter.
Downloads
Version 0.9.9 (2024-04-15)
Windows
Windows 10 or later
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.
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Screenshots
Verified
Featured on the supported_software list in the official JPEG XL repository.
Verified for safety.
Full Feature List
- Conversion
- Batch conversion to JPEG XL, AVIF, WEBP, JPG and PNG
- Conversion from HEIF
- JPG Reconstruction
- JPEG XL lossy mode selection (VarDCT and Modular)
- Fast paralleled encoding
- Top quality JPG (JPEGLI)
- Top quality AVIF (AOM-AV1)
- Keep folder structure
- Easy metadata handling
- Lossless (only If smaller) mode
- 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