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Convert PDF to black and white

Make a grayscale copy for printing, or for forms that ask for black-and-white scans. Your file never leaves your device. The tool runs entirely in your browser — nothing is uploaded, stored, or seen by us.

Free Android app

Shrinking PDFs on your phone? Do it offline.

FramePDF makes PDFs smaller right on your Android phone — no upload, no signal needed. Handy when the form is open on your phone and the certificate is sitting in Downloads.

  • Make the PDF smaller in one tap
  • Works with no internet connection
  • Combine, reorder, rotate or remove pages too
Get FramePDF on Google PlayAndroid · Free · No account · Works offline

How to convert PDF to black and white

  1. 1Drop your PDF into the box.
  2. 2Press Convert to black & white.
  3. 3Download the grayscale PDF.

PDF to black & white: key facts

Price
Free — no sign-up, no watermark
Privacy
Runs in your browser; files are never uploaded
Output
Grayscale PDF at 150 DPI
Bonus
Usually smaller than the colour original
Works on
Any modern browser — Android, iPhone, Windows, Mac
Offline option
FramePDF Android app (free)

Black & white for print and upload

Print shops charge less for black-and-white pages, and some government forms explicitly ask for B&W scans. Grayscale also removes coloured backgrounds and shadows that make scans look muddy.

Frequently asked questions

More free tools

Compress PDFMake a PDF smaller for email, WhatsApp or form uploads.Watermark PDFStamp text like “Copy — for KYC only” across every page of a PDF.Compress PDF to 100KBReduce a PDF to under 100KB in seconds.

Learn more

Why is my PDF so large?Scans, phone photos, embedded fonts and high-DPI images make PDFs huge.How PDF compression worksA plain-language explanation of how PDF compressors shrink files: resolution (DPI), JPEG quality, grayscale, and how to hit an exact KB target..