What is Sign PDF and how does it work?

Sign PDF lets you add a signature to a document without printing it. You draw or type your signature, drop it where it belongs, and download the signed PDF.

How do I use Sign PDF online?

Upload your file using the box above — drag it in, browse for it, or bring it in from your cloud storage. A preview appears so you can check you've picked the right file. Run Sign PDF, then download the result. You can rename it before you save it.

Is my file secure when I use Sign PDF?

Yes. The file you send to Sign PDF travels over an encrypted HTTPS connection and is processed automatically on our servers. It is never made public, never shared with anyone, and nobody reads it.

Does HuntPDF store my files after Sign PDF has run?

No. Your upload is deleted the moment Sign PDF finishes with it, and the file it produces is removed as soon as you have downloaded it, or when you upload another file, or when you close the page. Nothing is kept, and nothing is used to train anything.

Will the original quality and formatting be maintained?

Yes. The signature is placed onto the page and the rest of the document is left exactly as it was.

Can I use Sign PDF on mobile?

Yes. Sign PDF works in any modern browser on phones and tablets — iPhone, iPad or Android — with nothing to install. You can upload straight from your device or from your cloud storage.

Can I rename my file before downloading it from Sign PDF?

Yes. The file Sign PDF gives you back keeps the name of the file you uploaded by default. If you'd rather call it something else, edit the name in the field next to the download button before you save it.

Do I need to install any software to use Sign PDF?

No. There is nothing to download, install or sign up for — Sign PDF is used from your browser and does the work on our servers, so it behaves the same on Windows, macOS, Linux, Android and iOS.

How long does Sign PDF take?

Most files are finished in a few seconds. A large or page-heavy file takes a little longer, because Sign PDF runs on our servers rather than on your device — but you won't be waiting around. You can upload files up to 250MB.

Is Sign PDF free to use?

Yes. Sign PDF is free, with no signup, no watermark on the result and no daily limit for normal use.

Is a signature made with Sign PDF legally valid?

Many countries accept a drawn, typed or uploaded e-signature for everyday agreements such as leases. Some documents, like court filings, have stricter rules, so check what applies where you are.

Can I draw, type or upload my signature in Sign PDF?

All three. Drawing works well with a finger on a phone, typing gives a neat handwriting-style result, and uploading a photo of your real signature keeps it matching what you sign on paper.

How do I sign a PDF on my phone?

Open the PDF on the page, choose Signature and draw it with your finger. Then drag it onto the line and pull the corners to size it before downloading.

Can I add initials to every page of an agreement?

Create your initials once and place them on each page that needs them. The sidebar makes it quick to step through a long agreement page by page.

Will the white background of my signature photo show?

The background is removed from an uploaded signature photo, so only the ink is placed on the document. Sign on plain white paper in dark ink for the cleanest cut-out.

Can I fill in form fields while signing?

Yes. If the PDF has built-in fields, type into them and tick the checkboxes directly on the page, then add your signature and the date before you download.

What's the difference between Sign PDF and Fill PDF Forms?

Sign PDF is set up for adding a signature, initials and a date to any PDF, form or not. Fill PDF Forms focuses on the typed fields of an interactive form. Pick whichever matches the document in front of you.

Sign PDF Online – Free, No Signup or Watermark

Drop your file on the target

Several files · up to 260 MB each · deleted after processing

Drop your file here

Choose file

Draw, type or upload your signature
Date, text and check marks
Any page, any number
Up to 260 MB per file

PDF and image tools that run over an encrypted HTTPS connection. Files are auto-deleted after processing and never stored or shared.

Sign PDF lets you put your signature on a PDF on screen, place it on the signature line, and download the signed copy without printing or scanning anything. It suits a tenancy renewal, an offer letter or a client NDA.

How to sign a PDF online

Open your PDF by dropping it on the page or choosing it from your device, Google Drive, Dropbox or OneDrive (up to 260 MB). The document opens large, with a page sidebar so you can jump to the page that needs signing. Choose Signature and create it one of three ways. Draw it with a mouse, trackpad or finger. Type your name and it appears in a handwriting style. Or upload a photo of your signature on white paper, and the background is removed so only the ink lands on the page. Place it, drag the corners to size it, and download the signed PDF.

Initials, dates and ticks in Sign PDF

Many agreements want more than a single signature. Create your initials separately and drop them in the corner of each page that asks for them. The date tool stamps a date next to your name, a text box fills in anything else such as a job title or a flat number, and tick, cross and dot marks cover the yes/no boxes on a form. If the PDF has its own fillable form fields, you can type straight into them in place.

When to use Sign PDF

An HR officer onboarding a new starter can send the contract, get it back signed the same afternoon, and file it without going near a printer. A freelancer can sign a client's NDA on a phone between meetings. A parent can send a signed school trip form back on WhatsApp.

For documents where you mainly need to type into the boxes of an interactive form, Fill PDF Forms is laid out for that job.

Making your signed PDF look right

Size the signature to the line it sits on; one that spills into the text or floats in the margin looks careless. Zoom in to line it up, and use the page sidebar to check you haven't missed an initials box on a later page.

If the signed file should be read-only once it goes out, run it through Flatten PDF so form answers and marks become part of the page.

Frequently asked questions

Is a signature made with Sign PDF legally valid?: Many countries accept a drawn, typed or uploaded e-signature for everyday agreements such as leases. Some documents, like court filings, have stricter rules, so check what applies where you are.
Can I draw, type or upload my signature in Sign PDF?: All three. Drawing works well with a finger on a phone, typing gives a neat handwriting-style result, and uploading a photo of your real signature keeps it matching what you sign on paper.
How do I sign a PDF on my phone?: Open the PDF on the page, choose Signature and draw it with your finger. Then drag it onto the line and pull the corners to size it before downloading.
Can I add initials to every page of an agreement?: Create your initials once and place them on each page that needs them. The sidebar makes it quick to step through a long agreement page by page.
Will the white background of my signature photo show?: The background is removed from an uploaded signature photo, so only the ink is placed on the document. Sign on plain white paper in dark ink for the cleanest cut-out.
Can I fill in form fields while signing?: Yes. If the PDF has built-in fields, type into them and tick the checkboxes directly on the page, then add your signature and the date before you download.
What's the difference between Sign PDF and Fill PDF Forms?: Sign PDF is set up for adding a signature, initials and a date to any PDF, form or not. Fill PDF Forms focuses on the typed fields of an interactive form. Pick whichever matches the document in front of you.