.jxl
Convert a whole folder to JPEG XL (or back) in one batch
Smaller files, higher quality — the next-generation image format, processed offline on your PC.
Download the trial: 10 free images
Convert the whole folder now. Keep 10 results clean, free. $129 once removes the watermark from the rest. No card, no account, no upload. Windows 10 and 11.
- Add your imagesDrag & drop files or entire folders
- Pick JPEG XLChoose .jxl as the output format and set quality or lossless
- ConvertAll outputs ready in minutes
Batch convert JPEG, PNG and RAW to JPEG XL (.jxl), or turn JXL back into JPEG and PNG. No upload, no subscription.
JPEG XL vs JPEG, WebP and AVIF
| Format | Typical file size | Lossless mode | Lossless JPEG recompression |
|---|---|---|---|
| JPEG | Baseline | No | N/A |
| WebP | 25-35% smaller | Yes | No |
| AVIF | 30-50% smaller | Yes | No |
| JPEG XL | Up to 60% smaller | Yes | Yes |
Convert both directions
To JPEG XL
Shrink JPEG, PNG and RAW archives to .jxl with better quality at smaller sizes.
From JPEG XL
Turn .jxl files back into JPEG or PNG for apps that don't read JPEG XL yet.
Why JPEG XL?
Before Contenta
JPEG archives are big and lossy; re-saving them loses more quality every time.
After Contenta
JPEG XL stores the same photos smaller, can recompress existing JPEGs losslessly, and keeps full quality.
Start Converting Photos Today
Choose the plan that works for you. All plans include every feature.
No subscription trap. Contenta is a one-time purchase — less than 2 months of Lightroom, and it's yours forever.
Frequently Asked Questions
Contenta reads 100+ input formats, including JPEG, PNG, TIFF, WebP, HEIC, AVIF, BMP, GIF, PDF and 30+ camera RAW formats (CR2, NEF, ARW, DNG, RAF, and more), and writes 28 output formats.
There is no limit. Contenta uses multi-core processing to convert thousands of images in minutes. Users regularly process 10,000+ photos in a single batch.
Yes. Contenta supports 30+ RAW formats from Canon, Nikon, Sony, Fuji, Panasonic, Olympus, and more. Full white balance, denoising, and color adjustment controls are built in.
Every feature, every file and no time limit. Each batch converts in full; results carry a small watermark until you pick up to 10 of them to keep clean. Those picks count once per PC, not per batch, and a batch of 500 costs none until you choose. A license ($129 once) removes the watermark from everything you convert.
No. Contenta Converter is a one-time purchase. You pay once and own it forever, including all future updates. No monthly or yearly fees.
What Our Users Say
“I have been using Contenta Converter for years and it has saved me countless hours of work. Highly recommended!”
“Simple, fast, and does exactly what it promises. The batch processing is incredibly efficient.”
“Best image converter I have found. The RAW support and metadata handling are top-notch.”
Published by ContentaSoft, Umea, Sweden — developer of Contenta Converter PREMIUM.
Contenta Converter PREMIUM is a desktop application for Windows that batch converts, resizes, renames, watermarks, and processes images in 100+ formats including JPEG, PNG, WebP, HEIC, TIFF, RAW, and PDF.
This software contains no adware, spyware, toolbars, or bundled third-party programs. The installer installs only Contenta Converter PREMIUM.
Conversion, resizing, watermarking and metadata editing run on your computer. The optional AI features (background removal, photo restoration, colorize) send the images you process with them to Google Gemini using your own API key. The software does not collect personal data.
Free trial with every feature and no time limit: every file converts, up to 10 results you pick stay clean and the rest carry a watermark. Lifetime license: $129 (one-time payment, no subscription).
How to Uninstall
Open Windows Settings > Apps > Installed apps, find 'Contenta Converter PREMIUM' in the list, and click Uninstall. You can also run the uninstaller from the installation folder or use Control Panel > Programs and Features.
Download size: ~2 MB (web installer). Additional components are downloaded during installation (~300 MB total).