Sign a PDF. Right in your browser.

Sign forms, letters and agreements

Use Sign PDF for offer letters, rent agreements, college forms and declarations. You can place the same signature on several pages, or add initials to every page by placing it more than once.

The original text and layout of the PDF are kept exactly as they were. Only the signature image is added on top.

Signing with a photo of your signature

Sign on white paper, take a photo, choose Image and upload it. Remove white paper is on by default, so the paper disappears and only the ink lands on the page.

Why use Sign PDF on 108pdf

Sign PDF runs entirely in your browser. Your file is opened by your own device, processed there and saved back to you, so it is never uploaded to a server and never stored by us. That makes it safe for ID cards, exam forms, contracts and any other document you would rather keep private.

There is no account to create, no watermark on the result and no daily limit. You can process as many files as you like, one after another, and the tool keeps working even on a slow connection once the page has loaded.

If the result is not what you expected, change the options and run Sign PDF again on the same file. Nothing is lost, and your original file is never touched. Use the related tools below to continue the job, for example to resize, convert or merge the output.