In short
pd00 signs a PDF by drawing an image of your signature (made with a mouse, finger or pen, typed in one of 3 handwriting styles, or uploaded as a PNG or JPG) onto whichever pages you choose, as often as you need, and it adds dates or initials as real text. It is not a certificate-based digital signature, so it doesn’t prove who signed; whether a copy signed this way is accepted is up to the recipient and the rules where you live.
How to use Sign PDF
- Open your PDFDrop the PDF on the page or choose it with the file picker. Its pages appear next to the signature panel (below it on a phone), ready for placing; a file with a password needs Unlock PDF first.
- Make your signaturePick Draw, Type or Upload, create the signature and press Use this signature. It joins the Ready to place list, next to any date, initials or text you add with the buttons underneath.
- Place it and downloadSelect an item in the list, then click the spot on the page where it belongs, or choose a page number and press Place on this page. Drag to adjust, then press Sign and download.
A worked example
A landlord sends lease.pdf: 4 Letter pages, with the signature line on page 4 and a request to initial every page. You draw your signature once and press Use this signature. Choosing page 4 and Place on this page puts it on the page at 28% of the page width, which is 0.28 × 8.5 = 2.38 inches; you drag it onto the line and pull its corner until it fits.
Next you add Date, which fills in today’s date in your language’s format, and place it beside the signature. Then Initials turns the name you typed, say “Jamie Doe”, into “J.D.”, and Every page stamps it on all 4 pages at once.
Sign and download saves lease-signed.pdf: still 4 pages, with the signature image stored once and drawn once, plus 5 lines of real, selectable text (1 date and 4 initials).
What it covers, and its limits
- It places a picture of a signature. It isn’t a certificate-based (PAdES) digital signature, so it can’t prove who signed or reveal later edits.
- One PDF per run. A password-protected file has to go through Unlock PDF first.
- Dates, initials and other text can use Latin, Greek, Cyrillic, Chinese, Japanese or Korean characters; Arabic, Hebrew, Hindi, Thai and emoji can’t be placed as text.
- The 3 handwriting styles cover Latin letters only. Other scripts in a typed signature are drawn with a font installed on your device.
- Signatures stay in this tab unless you tick Remember on this device, and even then only in this browser.
Sources
- PDF 2.0, ISO 32000-2 (2017, 2020) Library of Congress
- Pointer events MDN Web Docs
- Window: localStorage property MDN Web Docs
- SIL Open Font License, official text SIL
Links checked on October 10, 2026.
About Sign PDF
Plenty of paperwork still arrives as a PDF that wants a signature: a lease, a permission slip, a timesheet, a delivery note, an offer letter. Printing it, signing with a pen and scanning it back works, but it takes a printer, a scanner and ten minutes. This tool does the same job on screen. You make your signature once, then put it, and as many copies as you like, on the pages that need it.
There are three ways to make the signature. Draw gives you a pad that follows a mouse, a finger on a touch screen or a pen on a tablet; with a pen, harder pressure makes a thicker line, as it would on paper. Type writes your name in one of three handwriting-style fonts. Upload takes a photo or scan of a signature you made on paper and, if you leave Remove white background ticked, clears away the paper so only the ink is left.
Every signature becomes a transparent PNG image. The PDF itself is changed in just one way: the signature, plus any dates or initials you added, is drawn on top of the pages you chose. Text, images, page sizes and fillable form fields stay as they were. PDF viewers draw form fields and annotations such as comments and stamps above the page itself, so if something you placed sits on one of them, the tool stops before saving and asks you to move it. The one exception is an empty, unsigned signature field. For a form field, flattening the form first with Flatten PDF works too.
When people use it
Leases and rental applications
Landlords and agents often ask for a full signature on the last page and initials on all the others. Make both once, use Every page for the initials, and send back one tidy file.
Timesheets, invoices and delivery notes
An approver who signs the same kind of document every week can tick Remember on this device and find the signature ready the next time, on that computer only.
School forms on a phone
A permission slip that came by email can be signed with a fingertip on the phone it arrived on, then returned right away, with no printer and no scanning app.
Placing items with a mouse, a finger or the keyboard
Select an item under Ready to place and click or tap the page where it should go; it lands centred on that point. Drag it to move it and pull the small square at its lower-right corner to make it bigger or smaller. The proportions stay fixed, so a signature never ends up squashed.
Without a mouse, choose a page number next to Place on this page and press the button. The new item takes the keyboard focus, and from there:
| Key | What it does |
|---|---|
| Arrow keys | Move the item a small step (1% of the page width) |
| Shift + arrow keys | Move it a bigger step (5%) |
| + and − | Make it 10% bigger or smaller |
| Delete or Backspace | Take it off the page |
Tab moves between placed items. A screen reader announces each one with its page number.
Dates, initials and short text
Date starts with today’s date written the way your language usually writes it, and you can change it in the box before or after placing. Initials takes the first letter of each word you typed under Type, and Text is a blank box for anything short, such as a printed name or a job title. These go into the PDF as real text, not pictures, so they stay sharp at any zoom and can be selected and searched like the rest of the page.
What this signature is, and what it isn’t
The result is a signature image on a page, much like a scan of a signed printout. A certificate-based digital signature is a different thing: it is issued with a digital certificate, it is tied to the exact content of the file, and it shows when anything changes afterwards. This tool doesn’t create one, and it says nothing about who placed the image.
Whether a document signed this way is good enough depends on who receives it and on the rules where you are. Many offices take it for everyday paperwork; some contracts, official forms and courts insist on a certificate-based signature or on ink. If it matters, ask the recipient before you rely on it.
Your signature stays on your device
The PDF, the signature and the finished file never leave this browser tab. Nothing is stored unless you tick Remember on this device. With it ticked, this browser holds on to the signature images, and nothing else, in a small store of its own on this computer, ready for the next time you open this page. Delete saved signatures removes them at once, and in a private or incognito window they are gone when that window closes anyway.