How to sign a PDF without uploading it

Adding a signature to a contract does not require sending the whole file to a server. Most of what changes, such as a signature, a checkmark, or a name typed into a field, can be drawn directly onto the page as it is already rendered on your screen.

That distinction matters for a contract, a lease or a form with information that should not sit on a third-party server even briefly.

The PDF Editor renders the file locally and applies annotations, text boxes and drawn or typed signatures there. Once placed, the signature is flattened into the page before the file is saved, so it becomes part of the document rather than a separate layer.

Text boxes and highlights work the same way: placed and rendered locally, then baked into the file only at the moment it is saved.

Only merge, split, protect and unlock send the file to a server, as stateless page operations that hold the file for the duration of the request and nothing after. Annotating and signing never trigger that step.

Even those operations are stateless: the server holds the file only long enough to complete the merge, split, protect or unlock request, then discards it.

Open the PDF, place a drawn or typed signature where it belongs, add any other annotations needed, and save. The download is the flattened, signed file, and nothing about the annotation step touched a server.

The same browser-only process applies to adding a text box for a date or an initial, so a whole form can usually be completed without a single upload.