Sign PDF — Draw & Place a Signature Without Uploading
Draw your signature with a mouse or finger and drop it onto any page of a PDF. The signature is embedded entirely in your browser with pdf-lib — your document never leaves your device, and no account is required.
How to use this tool
- Open the PDF you need to sign.
- Draw your signature in the box or type it.
- Position it on the page and download the signed PDF.
Drop a PDF to sign
Your files never leave your browser.
About Sign PDF
This tool lets you draw a handwritten signature and place it onto a page of a PDF. You sign directly on a canvas with a mouse, trackpad, or finger on a touchscreen; the strokes are captured as a transparent PNG image. That image is then embedded into the PDF with pdf-lib and drawn onto the page you specify, at one of three preset positions — bottom-left, bottom-center, or bottom-right. The signature is added as an image layer on top of the existing page content; the original page is otherwise unchanged and its text stays selectable.
The signature box is sized proportionally to the page (about 30 percent of the page width) and positioned near the bottom, where signatures conventionally go. You choose which page number to sign, so you can target the final page of a contract, a specific form, or any single page in a multi-page document. The aspect ratio of your drawn signature is preserved when it's placed, so it won't appear stretched regardless of the page's dimensions.
This is a visible, image-based signature — the digital equivalent of signing a printout with a pen and scanning it. It is well suited to everyday agreements, forms, delivery confirmations, and internal approvals where a recognizable mark is what's expected. It is not a cryptographic digital signature: it does not embed a certificate, bind the signature to the document with a key, or provide tamper-evidence, so it won't satisfy contexts that legally require a verifiable digital certificate. Two practical notes: the signature is applied to a single page per run, so sign each page separately if you need marks on several; and because the file is re-saved, any pre-existing cryptographic signature on the document would be invalidated.
Everything — drawing, embedding, and saving — happens in your browser, so the document you sign is never uploaded to a server.
Frequently Asked Questions
- Is this a legally binding digital signature?
- It's a visible image-based signature, equivalent to signing a printout by hand and scanning it. It does not include a cryptographic certificate or tamper-evidence, so while it's fine for everyday agreements and forms, it won't meet requirements that specifically call for a certificate-backed digital signature.
- Can I sign more than one page at a time?
- Each run places the signature on the single page number you choose. To sign several pages, repeat the process for each page, selecting the next page number each time.
- Where on the page will my signature appear?
- You pick from three presets — bottom-left, bottom-center, or bottom-right — and the signature is sized to about 30 percent of the page width near the bottom, where signatures usually sit. Its proportions are preserved so it won't look stretched.
- Can I draw with my finger on a phone or tablet?
- Yes. The signature pad supports pointer input, so you can draw with a finger or stylus on a touchscreen, or with a mouse or trackpad on a desktop. There's a Clear button to redraw if a stroke doesn't look right.
- Will adding my signature change the rest of the document?
- No. The signature is drawn as a transparent image on top of the chosen page; the existing page content, including selectable text, is left intact. The rest of the document is unaffected.
- Does this work on an already-signed or certified PDF?
- You can add a visible signature, but be aware that saving a new copy changes the file's bytes, which invalidates any pre-existing cryptographic signature on the document. Use it on documents that don't carry a certified signature you need to keep valid.
- Is my signature or document uploaded anywhere?
- No. Your signature is captured, embedded, and saved entirely in your browser. Neither the document nor the signature image is sent to any server, and the tool works offline once loaded.
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Embed this tool on your site
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<iframe src="https://brevio.pro/embed/pdf-sign" width="100%" height="600" loading="lazy" style="border:1px solid #e5e5e5;border-radius:8px" title="Sign PDF — brevio"></iframe> <p style="font:12px/1.4 sans-serif"><a href="https://brevio.pro/tools/pdf-sign">Sign PDF</a> by <a href="https://brevio.pro">brevio</a></p>