Grayscale PDF

1. Choose a PDF with the colours you want to convert.
2. Choose Pictures only or Entire page. For whole pages, choose a page range and resolution.
3. Select Prepare PDF.
4. Compare the original and result, then download your new copy.

Pictures only

Converts separate embedded colour pictures at their original dimensions across all pages. Text and shapes retain their colours. Inline pictures need Entire page.

Entire page

Selected pages become grey pictures. Text is no longer selectable, links and comments lose interactivity on those pages, and accessibility tags are removed from the new copy.

Resolution

Higher DPI creates larger, sharper whole-page pictures. Very large pages may use a lower resolution to fit browser memory.

Standard PDFs without switchable layers or XFA. Whole-page conversion of fillable pages needs Flatten PDF first.

128 MB input/output/converted-picture working set. Each picture is limited to 12 megapixels and 8,192 pixels per side.

Up to 500 source pages; 100 whole pages or 200 colour pictures per run, with a two-minute deadline.

Current browsers with local workers. Included in the initial offline cache.

Each file uses the same settings independently. Review the output before sharing.

No. Greyscale output can be larger. Use Compress PDF if your main goal is a smaller file.

Choose Pictures only. It does not change text, vector shapes, links or form fields. Choose Entire page if coloured text and shapes must also become grey.

No. Original hidden objects and metadata may remain. Use Redact PDF or Clean PDF for the relevant purpose.

Changing a signed PDF needs acknowledgement and invalidates its signature. Files that open without a password are unlocked locally; other files need Unlock PDF first.