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Free PNG to JXL Converter Online - JPEG XL Next-Generation Format

Convert PNG images to JXL (JPEG XL) format instantly in your browser. Get 60-80% smaller file sizes with lossless quality. Cutting-edge image compression.

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Privacy First
Free Tool

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How It Works

Transform your PNG files to JXL (JPEG XL) format using our advanced browser-based converter. The process begins by analyzing your PNG file structure and extracting the image data using optimized PNG decoding algorithms. The extracted image data is then processed through our advanced color management system and re-encoded into JXL format using revolutionary JPEG XL compression algorithms with @jsquash/jxl library. This results in 60-80% smaller file sizes while maintaining perfect lossless quality and full transparency support. All processing happens locally in your browser - no uploads, no server processing, complete privacy guaranteed.

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Convert toJXL

jpeg → jxl
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Key Features

  • No file uploads required - works offline
  • 100% privacy focused - client-side processing
  • Browser powered - no software installation
  • Fast processing - WebAssembly technology
  • Free forever - no premium accounts

Supported File Formats

.png

Output Format: JXL

Technical Specifications

input Format PNG (Portable Network Graphics)
output Format JXL (JPEG XL)
compression Type Advanced JPEG XL codec with lossless and lossy modes
quality Retention 100% lossless or configurable lossy with superior quality
color Space Support sRGB, Display P3, Rec. 2020, HDR10, maintains transparency and wide color gamuts
max Resolution Up to 1,073,741,824 megapixels (1 billion+)
processing Time 3-6 seconds per image depending on complexity

Key Benefits

  • 60-80% smaller file sizes than PNG with identical quality
  • Both lossless and high-quality lossy compression modes
  • Full transparency and HDR support
  • 100% privacy with local browser processing
  • Progressive decoding and animation support
  • Future-proof format with advanced features
  • Multiple layers and backwards JPEG compatibility

Common Use Cases

  • Future-proofing image archives with efficient storage
  • High-quality photography with maximum compression
  • Professional workflows requiring lossless quality
  • Preparing for next-generation web standards
  • Archival storage with maximum space efficiency
  • Experimental and cutting-edge applications
  • Long-term storage with format longevity

Pro Tips

  • Perfect for archival and future-proofing image collections
  • Use lossless mode for graphics requiring pixel-perfect quality
  • Consider lossy mode for even greater compression on photos
  • Keep PNG originals until JXL browser support improves
  • Ideal for preparing images for future web standards adoption

Frequently Asked Questions

JXL offers revolutionary compression technology - 60-80% smaller than PNG while maintaining identical quality. It supports both lossless and lossy modes, progressive decoding, HDR content, wide color gamuts, animation, and advanced features like layers. JXL is the most advanced image format available, perfect for future-proofing your images.
No! Our converter uses lossless mode by default, ensuring pixel-perfect quality preservation. JXL's advanced compression algorithms can achieve 60-80% size reduction while maintaining 100% identical quality to the original PNG. You can also choose high-quality lossy mode for even smaller files.
JXL files are typically 60-80% smaller than PNG files while maintaining identical quality. A 10MB PNG might become 2-4MB JXL with zero quality loss. For lossy mode, you can achieve even greater compression (up to 95% smaller) with minimal visual impact.
Currently, JXL has limited browser support - mainly experimental support in Chrome (with flags enabled) and some Chromium-based browsers. As of 2024, JXL is not yet widely supported (~5% of browsers). However, JXL is the future of image compression, and support is expected to grow significantly.
JXL combines the best of all formats: lossless and lossy compression, transparency support, HDR content, wide color gamuts (Display P3, Rec. 2020), animation, progressive decoding, multiple layers, and backwards compatibility with JPEG. It offers better compression than WebP and AVIF while supporting more advanced features.
Currently, JXL is best for archival, future-proofing, and experimental use due to limited browser support. For production websites, consider WebP or AVIF with JXL as a future upgrade path. However, JXL is excellent for storing high-quality images efficiently and preparing for future adoption.
Currently, our converter processes one PNG file at a time to ensure optimal performance and quality. The conversion process is fast, typically completing in 3-6 seconds depending on image complexity, so you can quickly convert multiple files in succession.
Absolutely! Our PNG to JXL converter prioritizes your privacy and security. All conversion happens locally in your browser using WebAssembly and @jsquash/jxl library - your files never leave your device. No uploads to external servers, no data collection, no file storage. The conversion process is entirely client-side, ensuring your images remain completely private and secure.