Convert PDF to Grayscale
Convert a colour PDF to grayscale or pure black-and-white. Great for cheaper printing and for a consistent look.
Files are processed locally — nothing leaves your browser.
Client-side only· Instant· Free
Drop your files here, or click to browse
PDF files only • Maximum 200MB
Processed locally — your file never leaves your browser
More than one step?
In short
Grayscale PDF on Docmint: Convert a colour PDF to grayscale or pure black-and-white. Great for cheaper printing and for a consistent look. It accepts PDF files, runs entirely in your browser with no upload, and is free with no account.
- Category
- Edit & Optimize
- Input
- Processing
- On your device, in the browser
- Price
- Free, no sign-up
- Runs entirely in the browser (no file upload)
- Free to use, no account required
- Processes several files at once
- Accepts PDF files
Last reviewed
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Looking for something else?
Browse all PDF toolsWhy Docmint
Built for privacy, speed, and simplicity
Unlike other PDF tools, Docmint processes everything in your browser. Your files never touch a server.
100% Private
Your files never leave your computer. Zero servers, zero privacy risk.
Instantly Fast
Browser-first workflows keep common tasks fast, with no upload queue to wait for.
Enterprise Ready
GDPR compliant, WCAG accessible, and built with professional-grade security standards.
How to grayscale PDF
Follow these simple steps to get professional results in seconds
- 1
Upload the PDF
Drop the colour document.
- 2
Choose the mode
Grayscale keeps shades; Black & White thresholds everything for the smallest files. Set the output resolution.
Pages are re-rendered as images, so text is no longer selectable. Run OCR PDF afterwards if you need searchable text.
- 3
Convert and download
Click Convert.
Why use Docmint to grayscale PDF?
Experience the fastest, most private PDF tools online
100% Private
Your files never leave your computer. Zero servers, zero privacy risk.
Clear privacy handling
Browser-first • No retained files • No tracking
Instantly Fast
No upload, no queue. Processing starts the moment you drop a file.
Save hours of waiting time
Browser-based processing
Always Free
No subscriptions, no hidden costs. Premium PDF tools that respect your privacy and budget.
Save money on PDF tools
No credit card required
Pro Tips for Grayscale PDF
Get the most out of your grayscale PDF experience
Printing
Grayscale PDFs print identically on colour and mono printers, with no surprise toner use.
Resolution
150 DPI is plenty for office printing. Use 200–300 for small text.
File size
Grayscale JPEG pages are typically a third of the size of colour ones.
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Frequently Asked Questions — Grayscale PDF
Everything you need to know about how to grayscale PDF online
Will my text stay selectable?
No. This tool rasterises pages. Use OCR PDF on the result to restore a text layer.
Can I convert only some pages?
Yes. Enter a page range; other pages are copied unchanged.
Are my files secure while I convert to grayscale?
Yes. Everything happens inside your browser using JavaScript and WebAssembly. Your file is never uploaded, and nothing is stored on a server.
Do you keep a copy of my document?
No. The file lives in your browser's memory only. When you close or refresh the tab it is gone. We cannot see it, and neither can anyone else.