Greyscale PDF
Turn a colour PDF into shades of grey, ready for black-and-white printing or a cleaner look. Text and drawings stay sharp and selectable, and photos are converted too.
Greyscale PDF
Open · Preview · Convert
How to convert a PDF to greyscale
Open your PDF
Drop the file onto the tool. The preview shows the result.
Check the preview
Flip through the pages to see them in grey.
Download
Press Convert to greyscale and download.
Why use it
What this free tool does
Text stays text
Nothing is turned into a picture.
Photos too
Pictures are converted to grey.
Every colour type
RGB, CMYK and indexed colours.
Gradients covered
Colours that can't be converted directly are made grey too.
Live preview
See each page before saving.
Print-ready
Predictable black-and-white printing.
True greyscale, sharp text
Many tools make greyscale PDFs by turning each page into a picture, which blurs text and makes files bigger. Here, the colours themselves are converted, so text remains crisp, searchable and copyable.
Gradients and special inks that can't be converted directly are made grey with a blend layer, which looks grey on screen and in print. Comments and form fields keep their own colours.
Tip: Printing on a colour printer? Greyscale PDFs often print faster and use only black ink.
Your files stay on your device
Most online PDF sites upload your documents to their servers. Aleynray Ai does the work inside your browser instead, on your own computer or phone.
Nothing is sent anywhere, so contracts, bank statements, IDs and medical forms stay private, and there is no waiting for uploads.
- Free, with no sign-up or limits
- No watermark
- Files never leave your device
- Opens password-protected PDFs
- Works on desktop and mobile
Frequently asked questions
Will the text still be selectable?
Yes. Text stays real text.
Are photos converted?
Yes, photos and other pictures turn grey.
Is the file bigger?
Usually it's about the same size or smaller.
Is it free?
Yes. There is no sign-up, no limit on files and no watermark.
Are my files uploaded?
No. The tool runs inside your web browser and works on the file on your own device. Nothing is sent to a server, so private documents stay private.