Choose a PDF, pick Grayscale or High-contrast black & white, and tap Convert. High contrast whitens the paper and darkens the text — ideal for photographed documents.
Getting documents right for online forms
- Check the exact limit first. Portals state the format (PDF or JPG) and a maximum size such as 100 KB, 200 KB or 1 MB. A file even 1 KB over is rejected.
- Scan at 150–200 DPI. That is sharp enough to read and keeps files small. 600 DPI scans only make files bigger.
- Upload only the pages asked for. Remove blank or extra pages with Organise PDF before compressing.
- Password-protected PDFs (for example e-Aadhaar or bank statements) must be opened and saved without a password before most portals — and these tools — can use them.
- Name files clearly, e.g.
10th_marksheet.pdf, and open the final file once to check every page is readable.
How to pdf to black & white (grayscale)
- Choose the PDF.
- Pick Grayscale or High-contrast.
- Tap Convert and download.
FAQs
Will it make my PDF smaller?
Usually yes. For an exact limit, run the result through Compress PDF.
Are my files uploaded to a server?
No. The tool runs entirely in your browser using JavaScript — your files never leave your phone or computer, so they stay private.