Sign a PDF Privately, in Your Browser
Draw or type your signature and place it on any page without uploading a single byte. Free, no signup, no watermark, instant download.
How to Sign a PDF
Most documents that need a signature arrive as PDFs: a lease, a freelance contract, a school permission slip. GoPDFConverter lets you add a visual signature in browser memory without a GoPDFConverter file-processing upload, account, or per-file charge; completion time depends on the document and device.
- Open the Sign PDF tool and drop your file, or click Choose a PDF.
- Draw your signature on the signature pad with your mouse, finger, or stylus. Or switch to the Type tab, enter your name, and pick one of three cursive styles.
- Choose the page number. The last page is selected by default, since that is where most signature lines live.
- Pick a position on the 3x3 grid (bottom-right by default) and a signature size.
- Click Sign PDF & Download. The signed file saves straight to your device.
Why You Should Not Upload an Unsigned Contract
Think about what is in the documents you sign. An employment offer has your salary. A lease has your home address and often your bank details. An NDA describes confidential business plans. Sending any of these to a third-party "free PDF signer" means trusting an unknown server with some of the most sensitive paperwork you own, often with no clear answer on how long it is stored or who can read it.
GoPDFConverter takes a different approach. The PDF, your signature, and the signed output all stay on your device. The signing logic runs in your browser using the open-source PDF-LIB library, so selected document bytes are processed in browser memory rather than sent to GoPDFConverter for processing. You can even load the page once, go offline, and sign with your network disconnected. The result is the same signed PDF you would get from an upload-based service, minus the part where a stranger holds a copy of your contract.
Common Sign PDF Use Cases
- Leases and rental agreements: sign and return to a landlord without printing.
- Freelance contracts: countersign client agreements and statements of work in minutes.
- Permission slips: sign school forms on your phone and email them back.
- NDAs: keep confidential agreements confidential by never uploading them.
- Offer letters: accept a job without sharing your compensation details with a third-party server.
Visual Signature vs Digital Certificate
A quick word of honesty about what this tool does. It places an image of your signature onto the PDF page, which is what most people mean when they say "sign a PDF". Many jurisdictions accept this kind of simple electronic signature for everyday agreements, and it is exactly what you produce when you print, sign, and scan a document.
It is not a cryptographic digital certificate. Certificate-based signatures embed identity verification and tamper detection into the file itself, and some legal or government processes require them. If you are signing something notarized, regulated, or genuinely high-stakes, use a qualified e-signature service. For the lease, the permission slip, and the freelance contract, a visual signature is usually what both parties expect.