Do I need to install any software?

No installation required. The converter runs entirely in your web browser. No plugins, extensions or desktop apps needed.

How do I know the conversion was successful?

Xonvert validates the output file and shows a success confirmation. You can preview the result before downloading. If any issue occurs, a clear error message is displayed.

Is batch conversion available?

Yes. Drag or select multiple JP2 files and they'll all convert to JXL simultaneously. Download results individually or as a ZIP.

Is this JP2 to JXL converter free?

Yes, completely free. No registration, no hidden fees. Free users can convert files with Xonvert's full engine.

Why is my converted JXL file larger than the original JP2?

File size depends on compression settings and content complexity. Try the Medium quality preset for smaller output, or the file may simply contain data that resists JXL compression.