Do I need to install anything to sign a PDF file online?

No. Everything runs in the browser you are already using. There is no download, no extension and no plugin to add.

Does it work in every browser?

Any current version of Chrome, Firefox, Safari, Edge, Brave, Opera or Vivaldi will work, on desktop and on mobile. Very old browsers may struggle with larger documents because they lack the memory management newer engines have.

Do I need to be online the whole time?

You need a connection to load the page. After that, the processing happens on your device, so a brief drop in connectivity part-way through will not interrupt the work.

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 Online

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.

Doing this online means there is nothing to install, nothing to update and nothing to uninstall afterwards. Open this page, add your PDF file, and the sign pdf tool is ready — the same tool, with the same options, that powers every other sign pdf page on this site.

That matters more than it sounds. Desktop PDF software tends to arrive as a large download, ask for administrator rights, install a background updater and then propose a subscription. For a job you might do twice a month, that is a poor trade. An online tool has none of that overhead and is available from whichever computer you happen to be sitting at.

Everything the desktop version of this job needs is here: file validation before anything runs, live progress while it does, clear errors if something goes wrong, a retry button when it does, and a preview of the result before you commit to downloading it.

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

Nothing to install

No download, no installer, no administrator password. The sign pdf tool loads with the page and is ready as soon as you add a file.

Available from any machine

Work computer, home laptop, a borrowed device — the tool is at the same address with the same features and no licence to move across.

Always current

There is no version to keep up to date. Whatever improvements have shipped are what you get the next time you open the page.

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.

Why do this online instead of installing software

Installed PDF software makes sense if you work with documents all day and need features like redaction, preflight or PDF/A validation. For the specific job of getting a signed PDF, it is a lot of machinery for a small task — and licensing usually assumes one machine, which is awkward the moment you are on a different computer.

An online tool inverts that. There is no licence tied to hardware, no version to keep current, and no install step standing between you and the work. Open the page, do the job, close the tab. If you need it again next month from a different device, it is in exactly the same place and behaves in exactly the same way.

The one thing an online tool has historically been worse at is privacy, because "online" usually meant "uploaded to somebody's server". That is not how this tool works. The processing runs inside your browser on your own device, so you get the convenience of an online tool without the file ever going anywhere.

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

Do I need to install anything to sign a PDF file online?: No. Everything runs in the browser you are already using. There is no download, no extension and no plugin to add.
Does it work in every browser?: Any current version of Chrome, Firefox, Safari, Edge, Brave, Opera or Vivaldi will work, on desktop and on mobile. Very old browsers may struggle with larger documents because they lack the memory management newer engines have.
Do I need to be online the whole time?: You need a connection to load the page. After that, the processing happens on your device, so a brief drop in connectivity part-way through will not interrupt the work.
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.