Key takeaways
- Grayscale PDF removes color from every page.
- It saves color ink and often makes scanned PDFs smaller.
- Some courts, schools and portals require black-and-white submissions.
- For new scans, choose the Grayscale or Black & white filter directly.
Color isn't always needed. Printing a 50-page color scan wastes ink, some submission systems require grayscale, and color scans are larger than necessary.
How to convert a PDF to grayscale
- Open Grayscale PDF and add your file.
- Choose the quality — higher means sharper pages and a larger file.
- Convert and download.
When to use grayscale
- Printing long documents on a color printer — save colored ink.
- Submissions that require black and white (courts, exams, some portals).
- Smaller scans — color data takes space.
- Consistent look — mixed color and grey scans look uniform.
Grayscale vs black & white
| Grayscale | Black & white | |
|---|---|---|
| Shades | 256 levels of grey | Black or white only |
| Best for | Photos, stamps, signatures | Plain text |
| File size | Small | Smallest |
Need it even smaller?
Combine with Compress PDF. See reduce PDF size for email.
Private conversion
The conversion happens in your browser. Nothing is uploaded.
Frequently asked questions
Is grayscale the same as black and white?
Grayscale keeps shades of grey; pure black and white has only two tones. Grayscale is better for photos and stamps, black and white for plain text.
Will text stay sharp?
Yes. Choose a higher quality setting for the sharpest pages.
Does it reduce file size?
For color scans, usually yes. For text-only digital PDFs, the difference is small.
Can I convert only some pages?
Extract those pages first, convert them, then merge them back.