Is my PDF uploaded anywhere when I sign it?

No. The PDF is opened, rendered and re-saved entirely in your browser using local JavaScript. Nothing is sent to a server, so even confidential contracts never leave your device.

Can I draw my signature or do I have to type it?

Both. Draw mode gives you a pressure-free pad you can sign on with a mouse, trackpad or touchscreen. Type mode renders your typed name in a handwriting-style font. Either way the result is captured as a transparent image you place on the page.

Will signing flatten or blur the rest of the document?

No. The tool stamps only your signature image onto the existing pages using pdf-lib, so the underlying text, fonts, form fields and hyperlinks remain selectable and crisp — it does not rasterise the whole page.

Can I add the signature to more than one page?

Yes. Navigate between pages with the Prev and Next buttons and click to place a signature on each one. Every placement is independent, so you can sign a single page, initial every page, or mix both.

How do I move or resize a signature after placing it?

Click a signature to select it, then drag the box to move it or drag the small corner handle to resize. Resizing keeps the original aspect ratio so your signature never looks stretched. Use Remove selected to delete one.

Is this a legally binding electronic signature?

It produces a visible signature image on the PDF, which is widely accepted for everyday agreements. It does not add a cryptographic digital certificate, so for documents that legally require qualified or certificate-based e-signatures you should use a dedicated certificate authority.

Sign PDF Online — Gera Tools

Sign PDF lets you add a real signature to any PDF without printing, scanning, or uploading anything. Draw your signature with a mouse, trackpad or finger, or type your name in a handwriting style, then click directly on the rendered page to drop it exactly where it belongs. Drag to reposition, pull the corner to resize, and place signatures or initials across as many pages as you like. When you are happy, download a finished, signed PDF — all without a single byte ever leaving your computer.

It is built for the everyday paperwork that shouldn’t need an account or a subscription: contractor agreements, NDAs, school forms, rental documents, consent slips and approval sheets. Because the whole tool runs as client-side JavaScript, it works offline once loaded and is safe for confidential documents that you would never want to hand to a third-party server.

How it works

When you open a PDF, the page is rendered to a preview using pdf.js — the same rendering engine Firefox ships — so what you see is pixel-accurate to the real document. Your signature, whether drawn on the pad or generated from typed text, is captured as a transparent PNG with its empty margins trimmed away so it sits cleanly on the page.

Each signature you place is stored in PDF point coordinates rather than screen pixels, which means it stays in exactly the right spot no matter how the preview is scaled to fit your window. On export, pdf-lib loads your original file and stamps each signature image onto its page at full resolution. Crucially, the rest of the document is left untouched: text remains selectable, links keep working, and nothing is flattened into a picture. The signed file is then handed back to your browser as a download.

Example

Say you receive a three-page rental agreement. Open it, switch to Draw mode, sign once on the pad in dark-blue ink, and click Use this signature. On page 3 you click in the signature box to drop it, nudge it onto the line, and shrink it slightly with the corner handle. You then flip to pages 1 and 2 and click once on each to add your initials in the margin. Hitting Download signed PDF gives you agreement-signed.pdf — the landlord’s original text intact, your signature and initials baked in, and not one upload in sight.

Tips

Use the dashed guide lines on the signature pad to keep your stroke level.
Pick the ink colour before drawing or typing so it matches the look you want.
After placing a signature, click it once to reveal the resize handle.
Place a small initial in a corner and a full signature on the last page for multi-page contracts.

Everything here is computed locally in your browser. Your PDF and your signature are never transmitted, logged, or stored anywhere but your own device.