JPEG to JPEG XL — Losslessly Recompress Existing JPEGs
Convert JPEG to JPEG XL. The JPEG compatible mode achieves ~20% size reduction with zero quality loss.
Drop JPEG files here or click to select
.jpg, .jpeg, .jpe, .jif, .jfif (multiple files)
Settings
Files
Converting...
Preparing...
Format comparison
JPEG (Joint Photographic Experts Group) is the most widely used image format, ideal for photographs and images with gradients.
Pros
- ✓ Universal compatibility
- ✓ Adjustable compression
- ✓ Great for photos
Cons
- ✗ Lossy compression degrades quality
- ✗ No transparency support
JPEG XL is a newer image format designed to support both lossless and lossy compression modes. Support can vary by browser and toolchain.
Pros
- ✓ Supports both lossless and lossy modes
- ✓ Designed for high compression efficiency across content types
- ✓ Suitable for archiving with metadata when supported
Cons
- ✗ Limited browser support
- ✗ Developing tool ecosystem
When to Convert JPEG to JPEG XL
Convert JPEG to JPEG XL for experimentation or archiving. Use JPEG/WebP alongside it if you need broad compatibility.
Technical Format Details
JPEG Technical Specifications
Technical details
JPEG is a lossy format optimized for photos. Lower quality settings reduce file size, but can introduce artifacts around edges and text.
Good for
- Photos: Natural images with gradients- Sharing: Maximum compatibility
Notes
- Re-encoding: Repeated saves accumulate artifacts (use PNG for editing intermediates)- Transparency: Not supported
Reference: JPEG Committee
JPEG XL Technical Specifications
Technical details
JPEG XL is designed to support both lossless and lossy compression. It can be attractive for experiments and archiving, but real-world support still varies by browser and app.
Good for
- Testing/archiving: Trying a next-gen format where supported- Fallback conversions: Converting back to PNG/JPEG for compatibility
Notes
- Compatibility: Confirm the recipient platform supports JXL- Publishing: WebP/JPEG/PNG is often the safer default for the web
Reference: JPEG XL (JPEG Committee)
How to Use
Add files
Drop or click to select your JPEG files (multiple supported)
Confirm output
Default is JPEG XL. You can change to another supported output format if needed.
Adjust options
Set quality, resize, and metadata options only if you need them.
Convert & download
Download each file, or download everything as a ZIP for batch outputs.
FAQ
Is JPEG to JXL conversion truly lossless?
JPEG XL has a compatible mode that repackages the original JPEG data, allowing bit-identical JPEG reconstruction.
Can I get the original JPEG back?
Yes. JXL files created in JPEG compatible mode can be reconstructed to the bit-identical original JPEG.
How much size reduction is achieved?
About 20% in compatible mode. Lossy re-encoding mode can achieve 60%+ reduction.
Will converting reduce image quality?
It depends on the output format. PNG is lossless, so quality stays the same. Lossy formats like JPEG/WebP/AVIF/JXL can change file size and appearance depending on the quality setting. Always verify with the final output before publishing.
Can I keep Exif metadata?
When "Keep Exif/Metadata" is ON, we try to carry over things like capture time, camera info, and GPS where possible. Some tags may be dropped depending on the input, output format, and browser environment. Turn it OFF if you want to remove location data before sharing.
Can I convert multiple files at once?
Yes. You can select multiple files, convert them in one run, and download each file individually. For multiple outputs, you can also download everything as a ZIP. For very large batches, splitting into smaller runs is more stable.
Are my images uploaded to a server?
No. Conversion runs locally in your browser, and your images are not sent to an external server.
What if conversion fails or is slow?
Some formats (like HEIC/HEIF) depend on browser support. If it fails, try another browser, reduce the number of files, or resize before converting.
References
- W3C: PNG 3rd Edition
Official PNG/APNG specification reference.
- AOM: AVIF Specification
Normative AVIF container and coding behavior.
- JPEG Committee
Primary standards source for JPEG and JPEG XL.
- Google Developers: WebP
Reference for WebP encoding and support behavior.
More Tools
EXIF Remover (GPS & Date Taken)
Remove photo metadata like GPS and date taken before sharing. (HEIC/JXL supported)
Image Converter & Compressor (HEIC/WebP/AVIF/JXL)
Convert to JPEG/PNG/WebP/AVIF/JXL with quality control, plus format-specific pages for common pairs.
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Count characters, lines, and bytes in real time — great for posts and drafts.
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