Free tool · No sign-up needed

Turn Any Signature Photo Into a Clean White-Background Image

Drop in a phone photo or scan of a signature and get back a crisp image with a pure white background — no gray paper texture, no shadows — ready to paste into a POA, form, or letterhead.

Processed instantly, right here Your signature stays on your device Keeps your ink, removes the paper
Drag your signature photo here, or click to browse
JPG · PNG · WEBP · BMP — nothing ever leaves this tab
White-background signature
Your cleaned-up signature will appear here
Pixels
File size
Format

Runs entirely on your device — your signature is never uploaded anywhere.

Why bother whitening a signature?

A signature photographed off paper almost always carries a faint gray or cream background, plus shadows and scan noise. Pasted onto a Word document or a Power of Attorney, that shows up as a dirty rectangle around the signature instead of blending in. This tool reads the background tone per pixel and pushes anything that isn't ink to pure white, so the signature drops cleanly onto any document.

Three steps to a clean signature

No account, no install — the whole pipeline runs in JavaScript inside this tab.

1

Add the photo or scan

JPG, PNG, WEBP or BMP — drag it in or click to browse. Nothing is sent to a server; the file is decoded locally in your browser.

2

We whiten the background

Paper texture, shadows and scan noise are pushed to pure white while the ink stroke is kept (and optionally darkened for a crisper look). Blank margins are trimmed automatically.

3

Download and paste in

A clean PNG or JPEG lands in your downloads folder, ready to paste into your POA, form, or any document that needs your signature.

Questions about cleaning up a signature

 

Does this tool upload my signature anywhere?
No. Every step — decoding, thresholding, trimming and re-encoding — happens in your browser using the Canvas API. Your signature never leaves your device and this tool never makes a network request with your image data.
Will it work on a photo taken with my phone?
Yes — that's the most common source. A phone photo of a signature on plain paper, with reasonably even lighting, whitens cleanly. If part of the background survives, nudge the "Background sensitivity" slider up until only the ink remains.
Why does the edge of my signature look soft instead of jagged?
The tool blends a narrow band just below the background threshold instead of a hard cutoff, so anti-aliased ink edges stay smooth rather than turning into jagged pixel steps.
Should I download as PNG or JPEG?
PNG is recommended — it keeps the ink stroke's edges crisp with no compression artefacts. Choose JPEG only if you need a smaller file size and a little edge softness is acceptable.
Can I use this for a Power of Attorney or e-filing document?
Yes — a clean white-background signature is exactly what's needed when pasting a scanned signature into a Word template like a POA. Dexin's own POA Generator tool is built for that next step.

Filing a Power of Attorney?

Dexin's POA Generator merges applicant and trademark details into a ready-to-sign Form TM-M — paste your cleaned-up signature straight in.

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This tool is provided for convenience and does not constitute legal advice. Always confirm your document's signature requirements against the relevant e-filing portal or authority before submission.