Sign a PDF
Draw, type or upload your signature and drop it exactly where it belongs — without your document ever leaving this device. Signing needs a ThekkelSoft membership; the file itself is still handled entirely in your browser.
How to sign a PDF without uploading it
- Open your PDF — drag and drop it or browse from your device. It is opened directly in your browser, not uploaded.
- Create your signature — draw it with a finger, stylus or mouse; type your name in a handwriting face; or upload a photo of a signature on paper.
- Place it — click your signature to drop it on the current page, then drag it into position and pull a corner to resize. Add the date or a typed name if the form asks for them.
- Download — the signature is drawn into the page content, so it survives printing, re-saving and emailing. Your original file is untouched.
Draw, type or upload a signature
Drawing gives the most natural result, especially on a touchscreen — the pad smooths the stroke as you go, and the signature is trimmed to its ink so it lands the same whether you signed in the middle of the pad or the corner.
Typing is the quickest route when a recognisable mark matters more than an exact likeness. Three faces are offered, from a casual handwriting to a formal script.
Uploading reproduces your real signature. Sign a blank white sheet, photograph it straight on, and the near-white background is knocked out to transparency so only the ink lands on the page.
Signing a PDF on a phone or tablet
A touchscreen is the one place a drawn signature actually looks like your signature. Open the document on the phone it arrived on, draw with a finger or a stylus, and place the mark by dragging it — the pad takes pen, touch and mouse input equally, and the stroke is smoothed as you draw. Pinch-to-zoom works on the page, which is how you land a signature accurately on a small screen.
Nothing needs installing and nothing is transferred to a desktop first: the whole job happens in the mobile browser, which is exactly why a document emailed to you can be signed and sent back from the same device. Very large PDFs are bounded by the phone’s memory rather than by any limit we impose.
What this signature is — and what it is not
This tool draws your signature into the page. That is what the overwhelming majority of forms, consent slips, internal approvals and everyday agreements ask for, and it is what you get: a visible mark, flattened into the document so it survives printing, re-saving and emailing.
It is not a certificate signature. There is no cryptographic PKI and no PAdES structure behind it, so it carries no embedded proof of who signed and no tamper-detection, and we make no representation that a signature applied here conforms to the US ESIGN Act, the EU eIDAS Regulation, India’s IT Act, 2000 or any comparable law. Some documents — certain deeds, wills and court filings — require that stricter, certified form. Deciding what your document needs is your call; the position is set out in our Acceptable Use Policy.
Private by design
Signing a document usually means handing it to a website along with your signature. Not here — the file is read, signed and written back entirely inside this tab, and a Content-Security-Policy blocks the page from talking to any third-party server. Saved signatures are kept in your browser’s local storage on this device and are never transmitted. Read more in our privacy policy.
Preparing the rest of the document? Add a watermark, page numbers, or merge the annexures in first.
Frequently asked questions
Can I sign a PDF without uploading it?
Yes. The PDF is opened, signed and saved entirely inside your browser and never transmitted. A Content-Security-Policy makes the browser block requests to other origins, so the guarantee is enforced technically rather than just promised.
Why do I need a membership for this tool?
Because it changes the contents of a document. Placing a signature on a page is the same capability that can be misused, so this tool is offered to signed-in members who have accepted our Acceptable Use Policy — the undertaking that you will only sign documents you are authorised to sign. It also means misuse is traceable to an account rather than anonymous. Your file is unaffected by any of this: it is still opened, signed and saved entirely in your browser and never uploaded.
Is a signature I draw here legally valid?
We make no claim that it is. This tool draws a signature image into the page — it uses no cryptographic PKI or PAdES standard, and we make no representation that a signature applied here complies with the US ESIGN Act, the EU eIDAS Regulation, India's IT Act, 2000, or any other electronic signature law. In practice a signature applied electronically with intent is accepted for many everyday agreements, and some documents (certain deeds, wills and court filings) require a stricter, certified form. Determining what your document requires is your responsibility — see our Acceptable Use Policy.
How is this different from a digital certificate signature?
This tool draws your signature into the page, which is what most forms ask for. A certificate signature additionally embeds cryptographic proof of who signed and detects later tampering. That is a different feature, and this tool does not claim to provide it.
Where are my saved signatures kept?
In your browser's local storage on this device only — never on a server. They stay available for the next document you sign, and clearing your browser data removes them. On a shared computer, use the "Forget saved" button when you're done.
Can I sign on a phone or tablet?
Yes, and it is the nicest way to do it — draw with a finger or a stylus directly on the signing pad. The pad accepts pen, touch and mouse input equally.
I have my signature on paper. Can I use that?
Yes. Photograph it on white paper, then use the Upload tab. The white background is removed automatically so the signature sits on the page instead of in a white box.
Can I add the date and my name too?
Yes. "Add today's date" drops a date stamp you can drag into place, and the Text tool adds any other line you need — a name, a place, or a designation.
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