PDF to Grayscale
Convert the colours in a PDF to shades of gray while keeping text searchable and pages sharp.
Drop your PDF here
One PDF · up to 100 MB
Your PDF stays on your deviceNo signup
How it works
- Choose or drop a PDF file.
- We check whether it contains visible colour.
- Convert it to grayscale.
- Download the checked grayscale PDF.
Privacy
Your PDF is read and converted inside your browser. The file, its text and its images are not uploaded to our server, and everything is gone when you close the page.
Supported formats
One PDF up to 100 MB and 2,000 pages
Frequently asked questions
What does PDF to Grayscale do?
It converts visible document colors to shades of gray while preserving the PDF's pages, text and graphics.
Will my text still be searchable?
Yes. OneDo Hub does not turn entire pages into images just to convert their colors.
Does grayscale reduce file size?
Not always. File size depends on the PDF's images and internal structure. Use Compress PDF if your goal is primarily to reduce size.
Will links and forms still work?
They are preserved wherever possible. Existing visible form and annotation appearances are converted to grayscale rather than automatically flattened.
Are embedded attachments converted too?
No. Attached files are preserved unchanged. The visible main PDF is converted.
What happens to digital signatures?
Creating a grayscale copy modifies the document, so existing certificate signatures will no longer validate.
Is my PDF uploaded?
No. Processing runs in your browser.
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