To sign a PDF online, open it in Edit PDF, choose Signature in the toolbar, draw your signature in the box, press Place signature, drag it onto the signature line, and choose Export → Download PDF. The signed copy is assembled in your browser: a file opened from your computer is never uploaded unless you save it to your workspace or run one of the server tools, so a contract, lease, or consent form can be signed without it leaving your machine.
This covers:
- The four steps, start to finish
- Reusing the same signature next time
- Using a scanned or photographed signature instead of drawing one
- Adding the date, initials, or the blanks on a form
- What the signed file contains, and what it isn't
- What to do when something goes wrong
Sign a PDF in four steps
- Open Edit PDF. Nothing to install and no account needed to start.
- Add your PDF. Drop it onto the box or pick it from your computer. Opening from Google Drive or Dropbox works too, though those files are uploaded to fetch them. The document opens with its pages listed down the left side; click the page that needs the signature so it's the one on screen.
- Draw and place your signature. Choose Signature in the toolbar (the pen-stroke icon). Draw your signature in the box with a mouse, trackpad, or a finger on a touchscreen; Clear wipes it if the first attempt goes wrong. Press Place signature and it lands in the lower part of the current page, trimmed to the ink and already selected. Drag it onto the signature line and pull a corner handle to make it larger or smaller.
- Download the signed copy. Click Export and choose Download PDF. The file is built in your browser and downloads under the document's own name; the original stays exactly as it was. Save instead keeps the signed copy in your ZonePDF workspace, which does upload it.
Draw it big. The box captures whatever you draw and scales it down to a sensible size on the page, so a signature that fills the box comes out cleaner than one drawn small in a corner.
Got a form waiting for a signature?
Try Edit PDFReuse the same signature next time
The signature you draw is kept in this browser. The next time you open the Signature dialog it appears under Or reuse your last signature: click it and it's placed straight away, no redrawing.
Two things to know:
- It stays on this device. The saved signature lives in this browser only — not on our servers, and not in your account — so another computer or a different browser starts fresh. Clearing the browser's site data removes it too.
- Drawing a new one replaces it. Placing a freshly drawn signature makes that the saved one, so if you draw your initials for a moment, your full signature needs drawing again afterwards.
Use a scanned or photographed signature
If you already have your signature as a picture — a scan of a signed sheet, a photo from your phone — the Image tool places it on the page like any other image, and it can be moved and resized the same way as a drawn one.
The picture is placed as-is, background included, so:
- A PNG with a transparent background sits cleanly on the page, over lines and printed text alike.
- A JPG or a photo carries its paper with it. Crop it tight before you use it, and either keep it on white space or accept a small white rectangle behind the ink. Signed on clean white paper with a dark pen, the rectangle is barely visible.
Add the date, initials, or the blanks on a form
A signature is rarely the only thing a form asks for. The toolbar covers the rest:
| You need to | Use |
|---|---|
| Write the date, a printed name, or a title next to the signature | Text — click where it should go and type; the font, size, and colour are in the bar above the page |
| Initial each page | Draw for a quick freehand mark, page by page, or place your signature again and shrink it with a corner handle |
| Tick a box | Draw for a check mark, or Text with an X |
| Fill in a blank line | Text — type over the page wherever you click |
| Cover a wrong entry and retype it | Erase to white it out, then Text |
Typing with the Text tool writes onto the page wherever you click; it doesn't hook into a form's own fillable fields. For a form that's a scan or a flat print, that's exactly what you want. If the form has real fillable fields and the recipient needs them filled as fields, fill those in a PDF viewer first, then open the result here to sign.
Sign on the right page
The signature is placed on the page currently shown. On a multi-page contract, click the last page in the page list first, then open Signature — otherwise it lands on page one and needs deleting and placing again.
What the signed file contains — and what it isn't
Export copies the original pages into a new PDF and draws your additions onto them. That has three consequences worth knowing before you send the file:
- The signature becomes part of the page. It's flattened into the page rather than attached as a separate, removable annotation, so it opens the same in every viewer and can't be dragged off with a click.
- The rest of the document is untouched. Page sizes, the existing text, and its searchability all come through as they were. Signing a form doesn't turn it into a picture.
- It's a drawn signature, not a digital certificate. The result is the electronic equivalent of signing with a pen and scanning the page: a visible signature with no cryptographic certificate and no audit trail behind it. That's what most everyday forms, leases, and consent documents ask for. When a recipient specifically requires a certificate-based or audited e-signature, they will say so — that needs a dedicated e-signing service, not a PDF editor.
Because the export happens in your browser, a file opened from your computer is never uploaded to sign it. It's only sent to our servers if you choose Save to keep it in your workspace, open it from Google Drive or Dropbox, ask the AI assistant about it, or run a server tool such as Merge or Compress from the Tools menu — and then it's deleted within a few hours.
When signing goes wrong
| What you're seeing | What happened | Fix |
|---|---|---|
| "This PDF is password-protected, so it cannot be saved or exported" | The document is encrypted, and the browser can't rebuild it with the signature in place | Remove the protection with Unlock PDF first — you'll need the password — then open the unlocked copy and sign it |
| The signature landed on the wrong page | It's placed on the page that was on screen | Select it and press Delete (or use Undo), show the right page, and place it again |
| The signature is too big, too small, or sits off the line | It's placed at a standard size that doesn't match the form | Drag a corner handle to resize and drag the middle to move. Redraw it larger in the box if the strokes look thin |
| The saved signature is gone | It lives in this browser only | Draw it once more; it's saved again for next time |
| A scanned signature shows a white box | JPGs and photos keep their background | Crop tighter, keep it off printed lines, or use a PNG with a transparent background |
| The page is a scan and the text can't be selected | The document was a picture to begin with | Signing works the same; nothing here adds a text layer to a scan |
| Can't download another signed file | There's a cap on how many finished files you can download or save before a plan is needed | See pricing for the limits |
After signing
The signed copy usually has somewhere to go. The common next steps:
| You want to | Tool |
|---|---|
| Make it small enough to email | Compress PDF — how to compress |
| Send back only the signature page | Extract PDF Pages or Split PDF — how to split |
| Combine the signed form with the rest of the paperwork | Merge PDF — how to merge |
| Stop the signed file from being changed or opened without a password | Protect PDF |
| Turn the signed page into a picture for a portal that won't take PDFs | PDF to JPG |
See all PDF tools.
Frequently Asked Questions
How do I sign a PDF without printing it?
Open the file in Edit PDF, choose Signature, draw your signature in the box, press Place signature, drag it onto the signature line, and choose Export and then Download PDF. The signed copy is built in your browser and downloads to your computer.
Is a signature drawn in ZonePDF legally binding?
It's a drawn signature — the electronic equivalent of signing with a pen and scanning the page — with no cryptographic certificate or audit trail. Many everyday documents accept exactly that, but whether it's enough depends on the document, the recipient, and the law where you are. When a certificate-based or audited e-signature is required, the recipient will ask for one, and that needs a dedicated e-signing service.
Does my document get uploaded when I sign it?
Not when you open it from your computer and download the result: the file is rendered and the signed copy is built in your browser. It's uploaded only if you save it to your workspace, open it from Google Drive or Dropbox, ask the AI assistant about it, or run a server tool such as Merge or Compress, and then it's deleted within a few hours.
Can I save my signature and use it again?
Yes. The last signature you drew is kept in this browser and offered under "Or reuse your last signature" the next time you open the Signature dialog. It stays on this device and isn't stored on our servers, so a different browser or computer needs it drawn again.
Can I use a photo or scan of my handwritten signature?
Yes. Use the Image tool to place the picture, then move and resize it like a drawn signature. A PNG with a transparent background sits cleanest on the page; a JPG or photo brings its paper background with it, so crop it tight first.
Can I sign a password-protected PDF?
Not directly: the editor can't rebuild an encrypted file, so Export stops with a message saying so. Remove the protection with Unlock PDF, which needs the password, then open the unlocked copy and sign it.
