Remove background from a stamp or signature

Upload a photo or scan of a signature or stamp to remove the background, text, lines, and artifacts. Get a transparent stamp or signature in seconds.

Drag and drop a file here or click to select

PNG, JPG, PDF · max 20 MB

Converting PDF...

Preparing image for cropping

Select a page
This PDF has multiple pages. Select the one containing the stamp or signature.
Select a stamp or signature
Crop the stamp or signature without including the entire document.
If the stamp and signature overlap, the app can only extract one of them.
Stamp — extracts the stamp or seal. Signature — extracts the handwritten signature.
Additionally removes all printed letters, numbers, and form lines. Use this if the image has a lot of background text or black lines.
Suitable for most tasks using good-quality images without background clutter. The final image will closely match the original.
Image processing using smart algorithms. Suitable for low-quality files or those with a lot of background clutter. The final image may be automatically enhanced compared to the original.

Image processing

Please wait, the image is being processed...

Background removal

Image processed!

After Before
Before After
Daily limit reached

How it works

Three steps — and your transparent stamp is ready

1. Upload a photo

Take a photo of the stamp or signature with your phone, upload a file, or paste a link.

2. SigCleaner removes the background

SigCleaner removes the white background, various text, lines, grids, and random artifacts around the signature or stamp.

3. Download the result

The PNG with a transparent background is ready to be inserted into documents, Word, PDF, or design mockups.

Stamp or signature extraction

If a signature and a stamp overlap, SigCleaner can extract only one element of your choice — the rest will be removed.

  • Select "Stamp" or "Signature" in the crop settings
  • SigCleaner recognizes the object type and isolates it
  • The result is a transparent PNG with only the required element. Everything else will be removed.
How to extract a signature How to extract a stamp
Mode: Signature
Handwritten signature only
Mode: Stamp
Stamp or seal impression only
All features

Complete text removal

For complex cases — when there is a lot of printed text, lines, and form grids around the stamp or signature — enable aggressive removal mode. It forces the removal of all printed letters, numbers, and straight black lines, leaving only the impression itself.

  • Printed text and form numbers — removed
  • Straight horizontal and vertical lines — removed
  • The stamp impression or signature itself — preserved
More about this mode
When to use this mode
  • A lot of text and form lines around the impression
  • Table or form with horizontal lines
  • Standard mode left some text behind
  • "Paid" or "Received" stamp over text

Photo editor for stamps and signatures

After removing the background, you can change the color of the impression, make the stamp blue or red, and enhance contrast and brightness — right in your browser, without Photoshop.

  • Apply any color
  • Brightness, contrast, saturation, and sharpness of the impression
More about the editor
When it's useful
  • Need a blue stamp from a black-and-white scan
  • The impression is too pale — enhance the contrast
  • The signature needs to be darker for a document
  • The edges of the stamp are blurry — increase sharpness

Why SigCleaner

Built specifically for stamps and signatures — not a generic editor

No subscription

No watermarks — start working immediately, without registration.

Fast

Results — in 10–20 seconds. Fast and hassle-free.

Smart cleaning

Removes not only the background, but also various text, lines, shadows, and artifacts around the stamp.

REST API

Integrate background removal into your application.

Who is this service for

SigCleaner is for anyone working with documents who needs a clean image of a stamp or signature with a transparent background.

  • Accountants and office managers

    Insert a stamp into a digital document, invoice, or certificate without a white background box.

  • Law firms

    Make company stamps transparent for documents, contracts, and letters.

  • HR professionals

    Quickly remove the background from a signature or stamp for orders, employment contracts, and certificates.

  • Developers

    REST API with Bearer token authentication for batch processing and product integration.

What SigCleaner removes

SigCleaner's smart algorithm understands the structure of stamps and signatures and removes unwanted elements.

Removes
  • White or colored paper backgrounds
  • Various text on the page
  • 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
  • Transparent background in PNG format

Automate via API

SigCleaner provides a REST API for batch background removal from stamps and signatures. Integrate the API into your system and forget about manual document processing.

  • Easy Bearer token authentication
  • Supports PNG, JPG, and PDF inputs
  • Transparent PNG output
  • REST API with Bearer token
API Documentation
POST /api/clean
Authorization: Bearer <token>
Content-Type: multipart/form-data

← 200 OK
{
  "url": "/api/file/uuid"
}

Sign PDF and DOCX online

Removing the background isn't enough — you need to place the stamp into a document. Upload a PDF or Word file, drag the processed stamp or signature to the right place, and download the finished signed file. No registration required, right in your browser.

  • PDF and DOCX support
  • The stamp is applied without a white background
  • The result — a ready-to-send PDF
How to sign a PDF How to insert a stamp into Word
1. Upload a document
PDF or DOCX, up to 50 MB
2. Add the stamp
Drag and resize to the desired size
3. Download the PDF
Finished signed document
All features

Overlay a stamp — on any document

The service works with PDF and Word documents

Sign PDF online

Add a stamp or signature to a PDF invoice, contract, or certificate. The image is applied with a transparent background — as if it were signed by hand.

Learn more

Stamp in a Word document

Upload a DOCX and insert a company stamp without a white background. Download the final PDF, ready to send.

Learn more

Online background removal for stamps and seals

SigCleaner is an online service that helps you make a stamp transparent, remove the background from a seal, or extract a signature from a photo without installing any software. Upload a scan or photo, and SigCleaner will carefully remove all unwanted elements, leaving only a clean image with a transparent background in PNG format.

Unlike standard photo editors, SigCleaner is specifically designed to remove backgrounds from stamps and handwritten signatures. The service distinguishes printed text from the stamp itself, and detects form lines and paper shadows — removing these unwanted elements while leaving the stamp intact. The result is perfect for inserting into Word, PDF, or Google Docs.

Want to remove the background from a signature, make a stamp transparent, or extract a seal impression from a scan? Just drag and drop your file into the upload area above — no registration required. And for automated processing of a large volume of documents, use our API.

SigCleaner can not only remove backgrounds but also sign documents online. You can overlay a stamp on a PDF, add a signature to a contract, or insert a stamp into a Word (DOCX) file right in your browser — without registration. Upload a file, drag the processed impression to the right place, and download the finished signed document.