Remove background from a seal, signature, or stamp

No sign-up required, results in seconds.

Remove Background

What the service can do

Five tools in one — for any task involving a stamp or signature

Background removal

Removes white and colored paper backgrounds. The result — a transparent PNG, ready to insert into documents.

Stamp extraction

Isolates only the seal or stamp impression, even if they overlap.

Signature extraction

Extracts only the handwritten signature. A digital facsimile — in seconds.

Complete cleanup

Removes all text, numbers, and lines, even if they overlap the stamp or signature.

Photo editor

Change the stamp color, saturation, brightness, and contrast after removing the background.

What it removes — what it keeps

SigCleaner understands the difference between the stamp and the background — and removes only the clutter

Removes

  • White and colored paper backgrounds
  • Printed text and form numbers
  • Lines, grids, and tables around the stamp
  • Shadows, smudges, and random artifacts
  • Shading and watermarks on forms

Keeps

  • The outline and text of the stamp itself
  • Handwritten signatures without losing details
  • Stamp colors — blue, red, black
  • Transparent background in PNG format
Precision editing

Stamp or signature extraction

When a stamp and signature overlap in the image — choose exactly what you want to keep.

Extract stamp Extract signature
Stamp only
SigCleaner will extract the stamp and remove the adjacent signature
Signature only
A signature facsimile without the adjacent stamp
For complex cases

Aggressive text removal

Too much text around the stamp? Tables, lines, text? Enable this mode — the service will aggressively remove all the clutter, keeping only what you need.

Learn more

When to use this mode

  • Lots of text around the stamp on a form
  • Table or form with horizontal lines
  • Standard mode left some text behind
  • "Paid" or "Received" stamps over text
After cleanup

Photo editor for stamps and signatures

SigCleaner's built-in photo editor is tailored for stamps and signatures.

  • Make the stamp blue, red, or black — use preset shades or a custom color
  • Enhance a faint impression: brightness, contrast, ink intensity
  • Sharpen the edges of a stamp or signature
Open in "My Files"

What you can adjust

Stamp color
Blue, red, green, graphite — or any custom shade
Brightness and contrast
Lighten or darken the stamp after scanning
Intensity and sharpness
Ink saturation and edge sharpness

Three steps — and you're done

No setup, no sign-up

1

Upload a photo or scan

PNG, JPG, or PDF. You can take a photo with your phone and import it into the service.

2

Crop the area

Select a stamp or signature. If necessary, choose an extraction mode.

3

Download PNG

Processing takes 10-15 seconds. Insert into Word, PDF, or Google Docs.

Who is it for

Anyone working with documents and stamps

Accountants and HR professionals Insert stamps into invoices, certificates, or orders without a white background.
Lawyers Clean up a stamp for a contract or any other document.
HR specialists Executive signature facsimiles for employment contracts.

Overlay a stamp or signature on a document

Not just stamp cleanup — the service allows you to add a stamp or sign a PDF or DOCX directly in the browser

Sign PDF online

Upload a PDF, drag and drop a stamp or signature into place, and download the signed document. No sign-up required, right in your browser.

How to sign a PDF

Stamp in a Word document

Open a DOCX, overlay the stamp with a transparent background and download the finished file — without a white background.

How to insert a stamp into Word

Precise placement

Move, rotate, and scale the stamp or signature directly in the browser. Place the stamp exactly where you need it.

Try it now

Automate via API

Integrate background removal into your CRM or admin panel.

  • Easy Bearer token authentication
  • PNG, JPG, or PDF in — transparent PNG out
  • Extraction settings and aggressive mode
  • REST API with Bearer token
API Documentation
POST /api/clean
Authorization: Bearer <token>
Content-Type: multipart/form-data

file=stamp.jpg
extract=stamp
aggressive=1

← 200 OK
{"url": "/api/file/uuid"}

Background removal for stamps and signatures — all in one service

SigCleaner is a specialized online tool for processing stamps, seals, and handwritten signatures. Upload a scan or photo — the service will remove the background, clean up overlapping text, and return a transparent PNG ready to be inserted into any document.

Unlike other background removal services, SigCleaner understands the structure of stamps and distinguishes the stamp from the document text. This allows it to remove exactly what gets in the way — without touching the stamp itself. All common formats are supported: PNG, JPG, and PDF.

Need to insert a stamp into Word or Excel without a white background? Create a transparent signature for a PDF? Or integrate processing into your corporate system via API? SigCleaner can handle any of these tasks — online and without installing any software.

SigCleaner allows you to sign a PDF online: upload a document, place your processed stamp or signature on it, and download the finished file. You can overlay a stamp on a PDF or DOCX right in your browser — no software installation or sign-up required. It's faster than printing, signing by hand, and scanning.

Try it now

No sign-up required — upload an image and get your result

Remove Background Help