Sign PDF Online
Draw your signature with the mouse or finger, or upload a signature image, then drag it anywhere on the page preview and download the signed PDF. Sign a
Drop your PDF file here
or click to browse files
Draw your signature with a mouse, trackpad or finger, or upload a picture of a signature you already have, then drag it anywhere on the page preview and download the signed PDF. You can sign a single page or stamp the same signature on every page at once - useful for contracts, NDAs, offers and forms that have to come back signed.
The document never leaves your browser: the page preview is rendered locally, the signature is drawn into a PNG and embedded into the PDF file on your own device. That makes it safe for contracts and personal documents that you would rather not upload to a random signing service.
How to sign a PDF
Draw or upload your signature
Pick the page and drag the signature into place
Download the signed PDF
FAQ
Is signing a PDF here legally binding?
This tool adds a visible signature image to the document. Whether that counts as a valid electronic signature depends on your jurisdiction and on the other party. For many internal documents and informal agreements a drawn signature is accepted, but for regulated contracts check the requirements first.
Is the PDF uploaded?
No. The preview is rendered in your browser and the signature is embedded locally with pdf-lib - the file is never transmitted anywhere.
Can I sign every page at once?
Yes. Enable "apply to every page" and the signature is placed at the same relative position on each page, which is what you usually want for initialling a multi-page contract.
Can I use a picture of my signature?
Yes, upload a PNG or JPG of your signature - a photo of a signature on white paper works well. Transparent PNG gives the cleanest result.
Does the signature stay editable afterwards?
The signature is embedded as an image, so anyone can cover it or add another one later. If you need to prevent changes, combine it with a flattened or protected copy.
Which PDF version is produced?
The original document is loaded and saved again with pdf-lib, so all existing pages, text and images are preserved exactly as they were.
Is this signature legally valid?
It creates a simple electronic signature, which is recognised for many everyday agreements and internal approvals under laws such as eIDAS in the EU and the ESIGN Act in the US. It is not a qualified or advanced signature with a certificate and audit trail, so contracts that require those need a dedicated signing service.
How do I add my signature?
You can draw it with a mouse or a finger on the signature pad, or upload an image of your signature. There is no typed or font-based option, so a photo or scan of your real signature usually looks best.
Does it sign every page?
You choose: a single page, or all pages. Signing all pages is useful when each one needs to be individually acknowledged.
Is my signature uploaded?
No. Both the PDF and your signature stay in your browser, and nothing is sent to a server. That matters most when the document is something a signature makes sensitive.
At a glance
| Input | |
|---|---|
| Multiple files | No |
| Where it runs | In your browser - files are never uploaded |
| Works offline | Yes — once the page has loaded |
| Price | Free, no sign-up, no watermark |
PDF versions, standards and compatibility
PDF 1.4 is readable by essentially everything and is the safe default for forms and general sharing. PDF 1.7 added better compression and is what most modern software writes. PDF/A is an archival variant that embeds every font and forbids outside dependencies so the file will still render identically in twenty years - archive offices and some government submissions require it, and it is a poor choice for everyday files because it is larger. Encrypted PDFs need the protection removed before any other tool can touch them, and a permissions (owner) password is weaker than an open password: it is meant to discourage printing and copying, not to keep anyone out.
Keeping text selectable and searchable
A PDF can hold real text or a picture of text, and the difference matters: real text can be selected, searched, copied and read aloud, while a scanned page cannot until someone runs OCR on it. Many "reduce size" tools silently flatten everything into images, which shrinks the file but destroys searchability and makes the text blurry when zoomed. If a document needs to stay usable - contracts, manuals, anything you may need to search later - keep text as text and compress only the images. If you are starting from a scan, run OCR first, then compress.