FREE TOOLS

Image to JPEG XL

Encode a still PNG, JPG, WebP or AVIF as JPEG XL, with lossy or lossless pixel encoding.

PNG, JPG, WebP, AVIF

JXL

Browser only

Runs locally in your browser. Your files, pasted content and generated output are not uploaded. Reset clears this tool’s working data.

This tool needs JavaScript. If it does not load, refresh the page and try again.

How to use this tool

Choose one supported image within the displayed limits.
Choose lossy or lossless pixel encoding, quality and effort.
Choose Process image. The first run downloads and verifies the local engine; Cancel terminates its worker.
Review dimensions and file-size change, then download. Reset clears the selected input and output.

Convert a local still image without uploading it.

Still images up to 20 MiB, 4 million pixels and 4,096 pixels per side. Output up to 32 MiB; reversible recompression output up to 20 MiB so it can be restored here. Native memory capped at 512 MiB; verified-engine download and processing deadline 120 seconds.
Animation and extra spot/depth channels are rejected. Pixel exports use 8-bit sRGB with orientation applied; source metadata and HDR values are not retained. Higher precision input is reduced to 8-bit output.
Lossless image encoding refers to decoded pixels, not the original source bytes. Browser color conversion and alpha rounding can change input values. Ordinary image encoding omits source metadata.
Reversible JPEG recompression preserves the original JPEG bytes and metadata, including any private location information. Some JPEG encodings are unsupported. Restoration requires reconstruction data and is unavailable for ordinary JPEG XL encodes.
JPEG XL files are not supported by every viewer. The local image converter can export PNG, JPG and WebP without native JPEG XL decoding. AVIF input and WebP/JPG output require browser codec support.
Results can be larger than input; actual size changes are reported. Large images or high effort can exceed the deadline.

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