Isolate your signature on a transparent background — 100% private, never uploaded.
Scan or photograph your signature and our AI removes the white background instantly, entirely in your browser. Your signature never leaves your device — safe for contracts, agreements, and legal documents. Download a clean transparent PNG to drop onto any PDF or form.
Works best on a dark signature on white or light paper. Faint pencil strokes or busy backgrounds may need a quick cleanup with the editor's touch-up brush — still entirely in your browser.
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First-time download. The model is cached after this — future visits skip straight to processing.
Create a transparent signature PNG for contracts, PDF forms, agreements, email signatures, and digital signing — all processed privately in your browser.
How it works in three steps
1
Drop an image
Upload, drag and drop, or paste an image from your clipboard. Supports JPG, PNG, and WebP files up to 15MB.
2
AI runs in your browser
Our AI identifies the subject and creates a precise transparent mask directly on your device. No image uploads or cloud processing.
3
Download or edit
Download a transparent PNG instantly or continue editing by adding text, shapes, effects, or a new background.
Free Online Signature Background Remover
ThumbCrafted's free signature background remover isolates your handwritten signature from its white background and exports a clean transparent PNG — entirely in your browser. Your signature never leaves your device, which makes it safe for contracts, agreements, and other private documents.
Scan or photograph a signature on white paper, remove the background in seconds, and drop the transparent PNG onto any PDF, form, letterhead, or invoice.
Sign Documents Without Uploading Anything
Most online signature tools ask you to upload your signature to their servers. ThumbCrafted doesn't — everything runs locally in your browser, with no upload, no sign-up, and no watermark. Your signature stays yours.
Frequently asked
How do I remove the background from a signature?
Scan or photograph your signature on white paper, upload it, and the AI isolates the ink and removes the background. Download a transparent PNG. Everything happens in your browser — your signature is never uploaded.
Is my signature uploaded anywhere?
No. This is the whole point: your signature is processed entirely in your browser and never leaves your device. Nothing is sent to any server — safe for private and legal documents.
Is this safe for legal documents and contracts?
Yes. Because processing is 100% local with nothing uploaded, it's well suited for signatures on contracts, agreements, and sensitive paperwork.
How do I add the signature to a PDF or form?
Download the transparent PNG, then drop it onto your PDF, Word document, or form. The transparent background means only the ink shows — no white box.
What format should I download?
PNG. It preserves transparency, so your signature sits cleanly over any document without a white box around it.
Can I use this to sign documents digitally?
Yes. A transparent-background signature PNG is exactly what you need to place your signature onto digital contracts and forms.
Does it work on a photo of my signature?
Yes. A clear photo of a signature on white or light paper works well — good lighting and contrast give the cleanest result.
Will faint or light pen strokes survive?
High-contrast ink (dark pen on white) works best. Very faint or pencil signatures may need a quick touch-up in the editor.
Is there a watermark?
No. Downloads are free with no watermark.
What image formats are supported?
JPG, PNG, and WebP files up to 15MB.
Can I remove a signature background without Photoshop?
Yes. It runs automatically in your browser, with no Photoshop or any install needed.
Does it work on mobile?
Yes, just a few seconds slower per image on a phone.
Is it really free?
Yes. Unlimited signature background removals, no signup, no watermark.