Convert a PDF to grayscale
Turn a colour PDF into black and white. Useful for printing on a black-and-white printer. Everything in your browser, no upload.
Choose your PDF
Drop here or click to choose
Files stay on your device — nothing is uploaded
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Your file is processed in your browser and never uploaded.
How does it work?
- 1
Choose your PDF
Drag your PDF here.
- 2
Convert
Each page is converted to grayscale.
- 3
Download
Download the black-and-white PDF.
Frequently asked questions
Is this the same as black and white?
Yes, grayscale is another term for black and white including shades of grey.
Does text stay readable?
Yes. All elements remain visible, only the colour is removed.
Are my files uploaded?
No. Everything happens in your own browser. Your file never leaves your device and is not stored anywhere.
Is it free?
Yes, completely free, without watermark or account. The site is paid for by ads.
More reading
Why in the browser?
PDFrust runs entirely in your browser using WebAssembly and modern JavaScript libraries such as pdf-lib and PDF.js. Your file is never sent to a server — all processing happens locally on your device. This means your documents remain private by design, regardless of what they contain. There is no account required, no file size limit, and nothing is stored after you close the tab.
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