Make a photo black and white

Grayscale, sepia, brightness and contrast, with a live preview.

Black and white is often required for signature uploads and makes scanned documents easier to read. Raise the contrast to get crisp black ink on a clean white background.

How to use it

  1. Choose your image or drop it on the box (you can also paste from the clipboard).
  2. Adjust the settings if you need to. The tool updates the preview straight away.
  3. Check the new size, then press Download.

Questions

How do I make a signature clearer?

Set black & white to 100% and raise contrast to about 150%. The exam resizer also has a one-click black & white option.

Are my files uploaded to a server?

No. The tool runs entirely in your browser using JavaScript, so your files never leave your device. You can even disconnect from the internet after the page loads and it keeps working.

Is it free?

Yes, free with no sign-up, no watermark and no daily limit.

Guides

All guides
Exam & form photos · 23 Oct 2026How to Make Your Signature Clear for Online Forms (Scan & Crop)Faint, grey or blurry signature rejected? Fix it with the right paper, pen, light, crop and black-and-white conversion, then hit the exact size.Exam & form photos · 23 Oct 2026IBPS Left Thumb Impression Size: 240x240 px, 20–50 KBIBPS left thumb impression size is 240 x 240 px at 200 DPI, 20–50 KB JPG. How to take a clear print at home and resize it for PO, Clerk and RRB.Exam & form photos · 23 Oct 2026SSC Signature Size in KB and cm: 10–20 KB JPG ExplainedSSC signature size is a 10–20 KB JPG. Why guides quote 4 x 2 cm, 6 x 2 cm, 140 x 60 or 236 x 79 px, and how to make one for CGL, CHSL, JE or CPO.

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