.jxl
JXL file: what it is and how to open it
A .jxl file is a JPEG XL image, the successor format the JPEG committee standardised in 2022.
- Add your JXL filesDrop in single files or a whole folder.
- Pick output formatJPG, PNG, TIFF, PDF and more.
- Click ConvertEvery file converted in one pass.
It is about a third smaller than JPG at the same quality, but Chrome, Edge and Windows Photos do not display it out of the box. Safari and some free viewers do. Contenta Converter batch converts JXL to JPG, PNG or TIFF on Windows, and converts JPG and PNG to JXL.
How to open a .JXL file on Windows
- Windows Photos with the JPEG XL extension (free). Install the JPEG XL Image Extension from the Microsoft Store, then double-click the file.
- GIMP or XnView MP (free). Both open .jxl files and export them one at a time as JPG or PNG.
- Contenta Converter, for folders. Drop a folder of .jxl files and get JPG, PNG, TIFF or WEBP in one batch, resized or renamed in the same pass. It also writes JXL from JPG, PNG or RAW photos.
Before you convert JXL files
- What changes in the conversion
A JPEG XL file can hold 16-bit colour, HDR and transparency as well as layers. Converting to JPG gives an 8-bit flat picture with no transparency, compressed once more; PNG and TIFF keep transparency and lose nothing further. A .jxl made from an existing JPEG is decoded and re-encoded rather than restored byte for byte, so the result is a new JPEG of the same picture, not the original file. - What Contenta Converter does with JXL
Contenta Converter decodes every .jxl with the reference libjxl decoder (djxl) and runs it through the normal pipeline, so you can resize, watermark and rename in the same batch and write JPG, PNG, TIFF, WEBP, AVIF or PDF. It also encodes JXL as an output format. Output is 8 bits per channel; an animated JXL gives its first frame.
The same photo, five outputs
DSC_0001.NEF · 3900×2613- PNG.png1.9 s16.1 MB
- AVIF.avif2.2 s2.02 MB
- JPG.jpg1.7 s1.69 MB
- WebP.webp1.7 s1.32 MB
- JPEG XL.jxl1.7 s1.12 MB
格式 |
JXL |
公司 |
Joint Photographic Experts Group |
| 說明 | JPEG XL (.jxl) is the image format the JPEG committee standardised as ISO/IEC 18181 in 2022. It compresses photos about a third smaller than JPG at the same quality, can store an existing JPEG losslessly in a smaller file, and supports transparency, 16-bit colour, HDR and very large images. Safari shows it; Chrome dropped support in 2023. |
| 優點 | Smaller than JPG and WEBP at the same quality. Lossless recompression of existing JPEGs. Transparency, HDR, wide gamut, layers and up to 32 bits per channel. Fast decoding. |
| 缺點 | Not shown by Chrome, Edge or Windows Photos without an extension; few editors save it. Adoption is uneven, so files sent to other people often need converting to JPG or PNG first. |
| 元數據 | 處理XMP, EXIF 或 IPTC |
Ready to convert your JXL files? Download the free trial.
Download the free trial: every file converts, keep 10 clean使用者證明:
"今天一定得轉換一些圖像。你的軟件真是救了我一命！謝了！"Jason Hoffman，加利福尼亞州
"我每天都拍攝RAW圖像。我非常喜歡你的軟件，因為它很省時。"
Jim Richardson，印第安納州
"我一直都在注意圖像轉換器。我發覺你們的軟件乾淨，簡單，而且非常棒！"
Brandon Keegan，紐約州
保證滿意:
 | 簡單又專業的照片轉換以及處理過程 |
|
| 攝影師（業余和專業），設計工作室，建築師，大機構（NASA，IBM，克萊斯勒，大學醫院）所使用的產品。 |
|
| 完全無風險. 購買後，您將獲得一個30天退款保證，絕不多問。 |
JXL 圖像優化
JXL 圖像處理
Frequently Asked Questions about JXL
Why can't Chrome open a JXL file?
Google removed JPEG XL from Chrome in 2023, and Edge followed. Safari, GIMP and XnView MP open it, and Windows Photos does once the free JPEG XL Image Extension is installed. Converting to JPG or PNG makes it open everywhere.
Is JXL to JPG lossless?
No. JPG is lossy, so the picture is compressed again. Keep the quality at 90 or higher and the difference is hard to see after one conversion. For a lossless copy, convert to PNG or TIFF instead.
Can Contenta Converter write JXL files?
Yes. Pick JXL as the output format and a folder of JPG, PNG, HEIC or RAW photos is encoded to JPEG XL in one batch, at the quality you set.
Need more than JXL conversion? Browse supported cameras that produce JXL files below, or: