FREE · IN-BROWSER · NO UPLOAD
Sign a PDF online — type or upload, no upload step.
Add a signature to any PDF. Type your name in a signature font for casual sign-offs, or upload a PNG of your hand-signed signature for contracts. The whole flow runs in your browser via pdf-lib — the file never leaves your device.
How it works
- Drop the PDF onto letsgoPDF. Pick Sign.
- Choose Type mode and type your name (rendered in a signature script font), or Upload mode and select a transparent PNG of your real signature.
- Pick a corner: top-left, top-right, bottom-left, or bottom-right. Toggle "Include date" to stamp today's date next to the signature.
- Click Apply. The signed PDF saves to your local history and downloads. The signature is rasterised onto the page — same effect as printing, signing, scanning, but in one click.
Type vs upload — which to use
- Type a name. Fastest. Works for low-stakes things: forms where the signature is mostly a check that you read and agreed.
- Upload a hand-signed PNG. Use for contracts, NDAs, work agreements. Sign on paper once, scan or photograph it, save as a transparent PNG, and reuse forever.
- Tip: making a transparent signature image. Sign on white paper, photograph it, drop it into a free image editor (e.g. Photopea), use Magic Wand on the white background, delete to transparency, save as PNG. Five-minute one-time setup that pays off across every contract for years.
Common questions
- Is this a legally binding e-signature?
- For most casual and business use (offer letters, NDAs, contracts under $10k), drawing or typing a signature is legally equivalent to a wet signature in the US (ESIGN Act), UK, EU, and most jurisdictions. For high-value contracts or court filings, use a Qualified Electronic Signature service (DocuSign, Adobe Sign) — those add a tamper-evident audit trail and identity verification we don't.
- Can the signature be removed by the recipient?
- The signature is rasterised into the page content, not added as an annotation. A determined attacker with a PDF editor could obscure or delete it, but they can't make it look as if you never signed. For tamper-evidence, password-protect the signed PDF (add a password).
- Are my files uploaded?
- No. Sign uses pdf-lib in your browser. Open the network tab while signing — there's no traffic. The signature image, if you upload one, is also processed locally.
- Can I sign multiple PDFs at once?
- Today, one at a time. Batch signing across multiple files is on the roadmap.