Will this work on a locked-down work PC?

Usually, yes. Because nothing is installed, there is no UAC prompt and no administrator password required, which is exactly the barrier that stops most PDF software on managed machines. The only thing that would block it is a network policy preventing access to the site.

Is the sign pdf tool different on Windows?

No. It is the same tool with the same options and the same processing code. Only the browser and the download location differ.

Is this a legally binding electronic signature?

It is a typed signature, not a cryptographic digital signature backed by a certificate. Many jurisdictions accept typed signatures for everyday agreements where both parties intend to be bound, but this tool makes no legal guarantee. If you need a qualified electronic signature with an audit trail and identity verification, use a dedicated e-signature service.

Can I draw my signature or upload an image of it?

Not yet — the tool currently places typed text. Drawn and image-based signatures are a planned addition.

Where exactly is the signature placed?

At the bottom right of the chosen page, inset from the edge, with a horizontal rule drawn directly beneath it. The horizontal position is calculated from the width of your name so it never runs off the page.

Can I sign more than one page?

One page per run. To sign several pages, run the tool again on the file you just downloaded, choosing a different page each time.

Can other people tell the document was signed here?

No branding, watermark or metadata identifying this tool is added. The signed file contains your document and your signature and nothing else.

Sign PDF on Windows

Add a typed signature to a document and download it straight away.

Drop your PDF file here

or browse your device

A single PDF file, up to 100 MB. Files are processed on this device.

If you are on a Windows PC and need to sign a PDF file, this page is the whole solution. Nothing to install, nothing to buy, and no account — add your file and the tool is ready.

Windows still has no built-in PDF editing at all. Edge will display a PDF and let you scribble on it, but it cannot merge, split, compress or convert. Everything else means installing third-party software, which on a work machine usually means an IT request, and on a personal machine means picking your way past installers bundled with browser toolbars and trial nags.

This runs in Edge, Chrome, Firefox, Brave or Opera on Windows 10 and Windows 11. There is no .exe or .msi, no User Account Control prompt, no administrator password and no entry added to Programs and Features. That makes it particularly useful on a managed work laptop where installing anything is simply not permitted.

Most documents that need signing do not need a cryptographic certificate — they need a name on a line so the other party can see who agreed to what. Internal approvals, delivery notes, consent forms and simple agreements all fall into this category, and printing, signing and rescanning them is a waste of an afternoon.

This tool types your signature onto the page in an italic face, draws a rule beneath it the way a printed signature block reads, and hands the document back. Sign the last page by default, or name any page in the document.

How to sign a PDF file

Add your PDF
Drop in the document that needs signing.
Type your signature
Enter your name as you want it to appear on the document.
Choose the page
Leave the page at 0 to sign the last page, which is where signature blocks usually live, or enter a specific page number.
Set the size
16 point suits most documents. Increase it if the signature needs to stand out.
Sign and download
Press Sign PDF, check the placement in the preview, and download the signed copy.

Why use this sign pdf tool

No Windows software to install

No application, no package and no app store download. The sign pdf tool runs in the browser already on your Windows device.

Identical output everywhere

The same code runs on every platform, so a file produced on a Windows PC is identical to one produced anywhere else.

Standard download handling

Finished files go to your usual downloads location and behave like any other file on Windows.

No printing or scanning

The signature goes straight onto the digital file, so the document never has to leave the screen and never loses quality to a scanner.

It looks like a signature block

The name is set in an italic face with a rule underneath, sized to the text, rather than being dropped onto the page as plain body copy.

Sign any page

Signature blocks are usually on the last page, which is the default, but you can name any page when yours is somewhere else.

Features

Typed signatureSet in Helvetica Oblique with a rule drawn beneath it.
Any pageSign the last page by default or specify one.
Adjustable sizeFrom 8 to 48 point.
Bottom-right placementPositioned where signature blocks conventionally sit.
Preview before downloadConfirm the placement before committing.

When people use this

Approving an internal document

Sign off a policy, a purchase request or a timesheet without the print-sign-scan round trip.

Returning a simple agreement

Add your name to a straightforward contract and send it back the same day.

Acknowledging receipt

Sign a delivery note or handover document and return it as a PDF.

Completing a consent form

Fill in a school, medical or membership form and return it digitally.

Using the sign pdf tool on Windows

Files save to your Downloads folder by default. If you would rather choose the location each time, turn on "Ask where to save each file" in your browser's download settings and you will get a normal Save As dialogue.

The tool itself behaves identically regardless of what you are running it on. The same options, the same validation, the same progress reporting and the same output — a file produced on a Windows PC is byte-for-byte equivalent to one produced anywhere else, because the same code does the work in both cases.

That consistency is worth something practical. Start a job on a Windows PC and finish it on a different device, or hand the page to a colleague on another platform, and neither of you has to learn a different interface or account for a difference in behaviour.

How signing works

The document is loaded with pdf-lib and Helvetica Oblique is embedded. The tool measures the width of your name at the chosen point size, positions it so it sits inset from the right edge of the page with a guaranteed minimum left margin, and draws it into the page content stream.

A thin horizontal line is then drawn immediately below the text, spanning exactly the width of the name. Nothing else on the page is altered, and the rest of the document is written back unchanged.

Privacy

Your files are not uploaded. When you add a PDF file, your browser reads it from your device into the memory of the tab you are looking at, and the sign pdf operation runs there using your own processor. Nothing is transmitted to any server at any point.

That means there is no file for anyone to store, no retention policy to trust, and no deletion schedule to take on faith. The document exists only in the memory of an open browser tab, and it is released the moment you close it, reload the page, or press start over.

The site uses standard anonymous analytics to count page views and how often each tool is used. Those events record which tool ran and whether it succeeded — never a file name, never file contents, and never anything that could identify a document or the person processing it.

No account is required, so no personal information is collected. There is no profile, no history and nothing tied to an identity, because no identity was ever created.

Security

The strongest security property this tool has is structural: your file never travels anywhere, so there is no transmission to intercept and no server-side copy to breach. This is not a policy that could change — it is a consequence of where the code runs.

You can verify it in about thirty seconds. Open your browser's developer tools with F12, select the Network tab, and use the tool. You will see the page's scripts load — including the PDF libraries, which are fetched on demand the first time a tool runs — and then nothing further. No request carrying your document is ever made.

For a stronger test, disconnect from the network once the page has loaded. The tool will keep working exactly as before, which is only possible because nothing is being sent.

Uploaded files are validated in the browser before anything runs: the extension must match what the tool accepts, the file must not be empty, and it must be within the size limit. Malformed documents produce a clear error and a retry option rather than a silent failure.

What this tool does not do

Being clear about limits is more useful than a feature list that quietly omits them. Typed signatures only, one page per run, with no cryptographic signing, certificate, timestamp or audit trail.

If you need capabilities beyond that — redaction, PDF/A conformance, OCR, or scripted batch processing across thousands of documents — dedicated desktop software genuinely earns its licence fee, and this is not trying to replace it. For the specific job of producing a signed PDF, everything you need is on this page.

Frequently asked questions

Will this work on a locked-down work PC?: Usually, yes. Because nothing is installed, there is no UAC prompt and no administrator password required, which is exactly the barrier that stops most PDF software on managed machines. The only thing that would block it is a network policy preventing access to the site.
Is the sign pdf tool different on Windows?: No. It is the same tool with the same options and the same processing code. Only the browser and the download location differ.
Is this a legally binding electronic signature?: It is a typed signature, not a cryptographic digital signature backed by a certificate. Many jurisdictions accept typed signatures for everyday agreements where both parties intend to be bound, but this tool makes no legal guarantee. If you need a qualified electronic signature with an audit trail and identity verification, use a dedicated e-signature service.
Can I draw my signature or upload an image of it?: Not yet — the tool currently places typed text. Drawn and image-based signatures are a planned addition.
Where exactly is the signature placed?: At the bottom right of the chosen page, inset from the edge, with a horizontal rule drawn directly beneath it. The horizontal position is calculated from the width of your name so it never runs off the page.
Can I sign more than one page?: One page per run. To sign several pages, run the tool again on the file you just downloaded, choosing a different page each time.
Can other people tell the document was signed here?: No branding, watermark or metadata identifying this tool is added. The signed file contains your document and your signature and nothing else.

Browse every PDF tool, or read the help and FAQ pages. Details of how files are handled are in the privacy policy.