Is this a legally binding signature?

In many jurisdictions (US, EU, UK, Australia, Canada), an image of a hand-drawn signature on a digital document is treated like a wet-ink signature for ordinary contracts. Documents requiring qualified or notarized signatures (real estate transfers, certain government filings) need a certificate-based digital-signature service instead.

Where exactly does the signature appear, and can I move it?

It's placed at a fixed position: the bottom-left corner of the first page. There's no drag-to-position step. If the signature line is on a different page, use the Reorder tool to move that page to the front, sign, then reorder back.

Is the signature cryptographically secured?

No — it's a visual element drawn into the page, like ink on paper. To make the signed document tamper-evident in a practical sense, encrypt it with Lock PDF before sending, and keep your own copy of what was signed.

My signature looks shaky. Any advice?

Use the Clear button liberally and try again — nothing is committed until you click Sign. Drawing on a phone or tablet with your finger almost always beats a mouse; sign slowly and slightly larger than feels natural, since the drawing is scaled down on the page.

Sign PDF

Draw your signature and add it to a PDF.

Drop PDF files here or browse

Max 100MB per file

About Sign PDF

Adding a signature to a PDF used to mean printing, signing, scanning, and emailing back. Convertora's sign tool collapses that into one step: draw your signature in the browser — mouse, trackpad, or finger — and it's embedded into the document as a clean image. The signed file downloads immediately, and nothing is uploaded anywhere, which is exactly what you want for the kinds of documents that need signatures.

The signature is placed at the bottom-left corner of the first page, which matches where the signature block sits on most single-page agreements, consent forms, and letters. The drawn image is scaled to a natural signature size (about 7 cm wide) and keeps the proportions you drew.

Be clear about what this is: a visual signature — a faithful digital capture of your handwriting — not a cryptographic digital signature with a certificate chain. For everyday contracts that's typically all that's needed; for filings that demand qualified electronic signatures, you'll need a certificate-based service.

How to use it

1Upload the PDF you need to sign (up to 100 MB).
2Draw your signature in the signature pad. A touchscreen gives the most natural result; the Clear button lets you retry until it looks right.
3Click Sign PDF. The drawing is converted to a transparent PNG and embedded at the bottom-left of the first page.
4Download the signed file, saved with a -signed suffix.

Common use cases

Signing and returning a one-page agreement, NDA, or consent form in under a minute.
Signing permission slips and school forms from a phone, where drawing with a finger is easy.
Adding your signature to a letter before sending it as a PDF.
Countersigning a simple contract whose signature line sits at the bottom of the first page.

Frequently asked questions

Tips

Sign last. Any later edit — merging, watermarking, even metadata changes — produces a new file, and you want the signed version to be the final one.
If the document has actual signature form fields, check the Fill PDF Forms tool first — typed values in real fields may be what the sender expects.

100% private — runs in your browser

Convertora processes everything on your device using JavaScript and WebAssembly. Files never leave your browser, are never uploaded to a server, and are never seen by us or anyone else. The moment you close the tab, the data is gone — there is no temporary cloud copy, no log entry, no retained backup.

Because the work happens locally, processing speed depends on your device — but there are no rate limits, no daily caps, and no file size restrictions beyond what your browser can handle in memory. No signup, no account, no payment. The tool works the same in incognito mode, on a corporate network, or after the page has loaded once, even with the network disconnected.