You scanned your signature, inserted it into the contract, and now there's a white rectangle sitting on top of the signature line — making it look like you stamped a blank sticker on the document rather than signing it. If you're trying to use it in a coloured document, the effect is even worse.
This is the transparent signature problem, and it comes entirely down to file format.
Why the white box appears
When you scan or photograph your signature, the output is almost always a JPEG file. JPEG is excellent for photographs but it has one fundamental limitation: it doesn't support transparency. Every single pixel in a JPEG has to be a colour — there's no concept of "empty." The white paper background of your signature gets saved as actual white pixels.
When you insert that JPEG into a Word document, Google Doc, or PDF, the application faithfully renders those white pixels — on top of anything that's underneath. Hence the box.
The solution is PNG, which does support transparency. A PNG signature where the white background has been replaced with transparency will display only the ink strokes when inserted. Whatever is underneath — text, a table cell, a coloured background — shows through.
How to make the signature transparent
- Scan or photograph your signature on plain white paper (clean white, not cream)
- Run the image through the Remove Background from Signature tool — it detects white and near-white pixels and makes them transparent
- Download the resulting PNG
- Insert that PNG into your document
The tool processes your image in the browser without uploading it to a server — relevant if the signature is on anything sensitive.
Using it in Microsoft Word
Insert → Pictures → select your transparent PNG. Once it's in the document, right-click and go to Wrap Text → In Front of Text. This floats the signature above the text layer so you can position it precisely over a signature line. The PNG transparency renders correctly — no white box.
If Word is still showing a white background: check that you're inserting a .png file, not a JPEG. Some signature scanning apps save as JPEG even when you ask for PNG. Look at the file extension in your downloads folder.
Google Docs
Google Docs handles PNG transparency correctly without any extra steps. Insert the image, click it to select it, and the signature appears with no background. If there's a white box: again, check it's a PNG, not a JPEG saved with a .png extension.
Email signatures
Most email clients — Gmail, Outlook, Apple Mail — render PNG transparency in HTML email signatures correctly. Upload the transparent PNG in your email client's signature editor and it will appear as ink-only on whatever background your email template uses.
Tip
If your email template has a coloured or patterned background, a transparent signature looks dramatically more professional than a white-boxed one. It's particularly noticeable in email footers on branded templates.
When the background isn't fully removed
If the result has residual grey or cream areas that weren't made transparent, it's usually because the original background wasn't cleanly white. Cream-coloured paper, shadows from holding the paper, or lighting from behind can leave patches that the tool's threshold doesn't catch.
The fix: photograph the signature again on fresh white A4 paper under good front-facing light, laid flat on a surface. The cleaner the original, the cleaner the result. The Signature to Transparent PNG tool uses a slightly different algorithm and may handle edge cases differently if the primary tool leaves artefacts.
Resizing before inserting
Scanned or photographed signatures are often much larger than needed for a document — a 3000×800 pixel signature looks unwieldy when inserted. The Resize Signature tool lets you set exact pixel dimensions before inserting. Common sizes: 200×50 px for email footers, 300×80 px for form fields, or whatever the specific document specifies.