3 ms·

I don't think so: JPEG 2000, as far as I know, isn't generally supported for web use in web browsers, but it is supported in PDF.

by jchw 11mo ago

fmajid 11mo ago
JPEG-XL is recommended as the preferred format for HDR content for PDFs, so it’s more likely to be encountered: https://www.theregister.com/2025/11/10/another_chance_for_jpeg_xl/ https://www.theregister.com/2025/11/10/another_chance_for_jp...
- jchw 11mo ago
  What I mean to say is, I believe browsers do support JPEG 2000 in PDF, just not on the web.
  - Zardoz84 11mo ago
    the last time that I check it, I find that I need to convert to Jpeg to show the image in browsers.
    - jchw 11mo ago
      A *PDF* with embedded JPEG 2000 data should, as far as I know, decode in modern browser PDF viewers. PDF.js and PDFium both are using OpenJPEG. But despite that, browsers don't currently support JPEG 2000 in general. I'm saying this to explain how JPEG XL support in PDF isn't a silver bullet. Browsers already support image formats in PDF that are not supported outside of PDF.
- bmicraft 11mo ago
  I'm not convinced HDR PDFs will be a common thing anytime soon, even without this chicken and egg problem of support
RobotToaster 11mo ago
So Firefox (or others) can't open a pdf with a embedded jpeg-2000/XL? Or does pdf.js somehow support it?
- lxgr 11mo ago
  Seems like it: https://github.com/mozilla/pdf.js.openjpeg https://github.com/mozilla/pdf.js.openjpeg This test renders correctly in Firefox, in any case: https://sources.debian.org/data/main/p/pdf2djvu/0.9.18.2-2/tests/test-jpeg2000.pdf https://sources.debian.org/data/main/p/pdf2djvu/0.9.18.2-2/t...
- jchw 11mo ago
  Apparently I really flubbed my wording for this comment. I'm saying they do support it inside of PDF, just not elsewhere in the web platform.
alwillis 11mo ago
> I don't think so: JPEG 2000, as far as I know, isn't generally supported for web use in web browsers, but it is supported in PDF. Safari supported JPEG 2000 since 2010 but removed support last year [1]. [1]: https://bugs.webkit.org/show_bug.cgi?id=178758 https://bugs.webkit.org/show_bug.cgi?id=178758

I don't think so: JPEG 2000, as far as I know, isn't generally supported for web use in web browsers, but it is supported in PDF.

by jchw 11mo ago

I don't think so: JPEG 2000, as far as I know, isn't generally supported for web use in web browsers, but it is supported in PDF.

fmajid 11mo ago

JPEG-XL is recommended as the preferred format for HDR content for PDFs, so it’s more likely to be encountered: https://www.theregister.com/2025/11/10/another_chance_for_jpeg_xl/ https://www.theregister.com/2025/11/10/another_chance_for_jp...

jchw 11mo ago
What I mean to say is, I believe browsers do support JPEG 2000 in PDF, just not on the web.
- Zardoz84 11mo ago
  the last time that I check it, I find that I need to convert to Jpeg to show the image in browsers.
  - jchw 11mo ago
    A *PDF* with embedded JPEG 2000 data should, as far as I know, decode in modern browser PDF viewers. PDF.js and PDFium both are using OpenJPEG. But despite that, browsers don't currently support JPEG 2000 in general. I'm saying this to explain how JPEG XL support in PDF isn't a silver bullet. Browsers already support image formats in PDF that are not supported outside of PDF.
bmicraft 11mo ago
I'm not convinced HDR PDFs will be a common thing anytime soon, even without this chicken and egg problem of support

RobotToaster 11mo ago

So Firefox (or others) can't open a pdf with a embedded jpeg-2000/XL? Or does pdf.js somehow support it?

lxgr 11mo ago
Seems like it: https://github.com/mozilla/pdf.js.openjpeg https://github.com/mozilla/pdf.js.openjpeg This test renders correctly in Firefox, in any case: https://sources.debian.org/data/main/p/pdf2djvu/0.9.18.2-2/tests/test-jpeg2000.pdf https://sources.debian.org/data/main/p/pdf2djvu/0.9.18.2-2/t...
jchw 11mo ago
Apparently I really flubbed my wording for this comment. I'm saying they do support it inside of PDF, just not elsewhere in the web platform.

alwillis 11mo ago

> I don't think so: JPEG 2000, as far as I know, isn't generally supported for web use in web browsers, but it is supported in PDF. Safari supported JPEG 2000 since 2010 but removed support last year [1]. [1]: https://bugs.webkit.org/show_bug.cgi?id=178758 https://bugs.webkit.org/show_bug.cgi?id=178758