PPM to JXL converter
A free PPM to JXL converter for Portable Pixmap files. Browser-based pairs here usually run in this tab, with no file upload.
Drop your PPM files here
or browse your device · paste with Ctrl+V
Accepts .ppm, .pgm, .pbm, .pnm files. You can queue several files; each is processed one after another on your own device.
Your files never leave this device — there is no upload and no server to delete them from.
- 01
Add your PPM files
Drop them onto the box above or click to browse. They are read straight from disk — nothing is sent anywhere.
- 02
Check the settings
JXL is already selected. Open the gear icon on any row if you want to change quality, dimensions or codec before converting.
- 03
Download your JXL
Press convert and wait for the row to finish. Convert several files and you can take them all as a single ZIP.
PPM
Portable PixmapDeliberately the dumbest possible image format — a short text header followed by raw pixel values. Beloved in academic and Unix pipelines precisely because anything can parse it in ten lines.
- Developed by
- Jef Poskanzer
- Released
- 1988
- Extension
- .ppm, .pgm, .pbm, .pnm
- MIME type
- image/x-portable-pixmap
- Compression
- Uncompressed
- Specification
- Open
JXL
JPEG XLThe most technically impressive format of the lot: better compression than AVIF, progressive decoding, and lossless JPEG recompression that shrinks existing photos ~20% with zero quality loss. Browser adoption has been slow and political.
- Developed by
- JPEG Committee
- Released
- 2022
- Extension
- .jxl
- MIME type
- image/jxl
- Compression
- Lossy or lossless
- Specification
- Open
- PPM is lossless, and JXL can be either. At typical quality settings this lands on lossy and trades size for some quality loss. Keep PPM as a source if you may need a higher-detail version later.
Questions about converting PPM to JXL
Is this PPM to JXL converter free?
Yes. Converting PPM to JXL here is free, with no account, no watermark and no daily quota. The work runs on your own device, so there is no server cost to pass on to you.
Is my PPM file uploaded anywhere?
For browser-based pairs, your file is read locally and converted by Squoosh in this tab. No file payload is uploaded; you may still see analytics and engine downloads in network logs.
Is there a file-size limit for PPM to JXL?
There is no imposed upload cap when it runs in-browser, but each conversion still depends on your device and browser memory. Large videos are the first practical limit, then memory-heavy documents or images.
Does converting PPM to JXL lose quality?
It depends on your selected settings and codec path. Many engines can write either lossy or lossless output for JXL, so you can usually increase quality if this file is your final version.
Can I convert several PPM files to JXL at once?
Yes. Drop in several files and each gets its own row; they are processed one after another on your device. You can download them one by one or as one ZIP.
Does PPM to JXL work on a phone, Mac or Chromebook?
Most modern browsers on Windows, macOS, Linux, ChromeOS, Android and iOS work. Very large videos are often more reliable on desktop or a browser with more memory.
Why do some conversions take longer on first run?
The conversion engine has to download first. Small codec bundles are fast, while ffmpeg is commonly 12–30 MB; later conversions of similar type use the cached engine.
I converted a file and the output is blank or unusable. What should I check?
Start over with default settings, then change one option at a time (quality, bitrate, page size, or codec) to isolate what changed behavior. If it keeps failing, retry with a smaller file and confirm the source format matches the pair.
Convert other formats to JXL
16 formats can become JXL here.
Convert PPM to other formats
A PPM file can become any of these.
JXL to PPM
The reverse conversion
JPG to JXL
PDF to JXL
PNG to JXL
Images to PDF
Turn photos or scans into a single PDF document.…
Compress Image
Make images smaller while keeping the same format.…
Resize Image
Change the pixel dimensions of one image or a whole …
Rotate & Flip Image
Turn images by 90 degrees or mirror them.…