Sign PDF
Draw or upload a signature, click to place it on any page. Everything runs in your browser, files never upload anywhere.
Step 4: Click on the preview below where the signature should go.
How to Sign a PDF Online
Upload your PDF, create your signature by drawing on the pad or uploading an image, choose the page, and click on the preview exactly where the signature belongs. Use the width slider to size it, place as many signatures as you need across pages, then generate and download the signed PDF. The whole workflow stays on your device from start to finish.
Choose your PDF file. A page selector appears once it loads.
Draw your signature on the pad with mouse, trackpad, or finger, or upload a signature image instead. Clear and redraw until you like it.
Select the page and set the signature width with the slider. The height scales automatically to keep proportions.
Click on the page preview where the signature goes. A dashed outline marks each placement. Undo and re-click to adjust.
Click Generate Signed PDF, then download the finished file.
Drawing a Good Signature
Draw large on the pad, filling most of the box, because the signature is captured at the pad's pixel size and looks sharpest when placed at a moderate width. Use smooth, confident strokes like you would with a pen; the pad follows pointer movement, so quick natural writing works better than slow careful tracing. On touch screens, sign with your finger or a stylus for the most natural result. If you prefer your real pen-and-paper signature, sign on white paper, photograph it in good light, and upload the image; a clean high contrast image at least 600 pixels wide produces the crispest placement. You can mix approaches too: upload a scanned signature, then fine tune the width slider before placing.
Placing Signatures Accurately
The preview renders the actual page at readable size, so zoom your browser if you need finer control and click precisely on the signature line. Each click centers the signature on that point, and the dashed outline confirms the footprint before you generate the file. Remember that PDF coordinates measure from the bottom of the page upward, but the tool handles that conversion for you; what you click is where the signature lands. For multi-page documents such as contracts with initials on every page, work through the page selector one page at a time, placing as you go, then generate once at the end. The Undo button removes only the most recent placement, so you can fix a miss without losing earlier placements.
Privacy and Limitations
Your PDF and signature never leave your browser. Preview rendering and signature embedding happen locally with pdf.js and pdf-lib, and no server, account, or email step is involved. One honest limitation: this adds a signature image to the page, not a cryptographic digital signature, so it carries no certificate or tamper evidence. For everyday paperwork that is exactly what most people need, but regulated filings or high value contracts may require a certified e-signature provider. The generated PDF is a standard file that opens in any reader and prints normally.
Frequently Asked Questions
How do I create my signature in this tool?
You have two options. Draw directly on the signature pad with your mouse, trackpad, or finger on touch screens, using smooth pointer tracking that follows your strokes. Or upload an existing signature image, such as a scan or a photo of your handwritten signature, which is loaded onto the same pad. You can clear the pad and redraw as many times as you like until the signature looks right, then place it on the document.
How do I place the signature on the right spot?
After loading your PDF, pick the page number and a live preview of that page appears. Click anywhere on the preview and your signature is placed centered on that click. A dashed outline shows the placed position so you can confirm it before generating the file. If you miss, use Undo Last to remove the placement and click again. You can place the signature on multiple pages or in multiple spots on the same page.
Can I resize the signature?
Yes. The signature width slider sets the width in PDF points, and the height scales automatically to keep your signature's original proportions, so it never looks stretched or squashed. Set the width before you click to place; each placement uses the current slider value. For a typical signature line, 120 to 180 points wide usually looks natural on a letter size page.
Is this a legally binding electronic signature?
This tool places a signature image onto the PDF, which works well for everyday agreements, consent forms, and internal paperwork. It does not create a cryptographic digital signature with a certificate, and it does not record an audit trail of who signed and when. For contracts with strict legal requirements, check with a lawyer or use a certified e-signature service; for routine documents, a placed signature image is commonly accepted.
Is my document uploaded to a server?
No. Everything happens locally in your browser: the PDF is rendered for preview with pdf.js and the signature is embedded with pdf-lib, all on your own device. Your document and your signature image never leave your computer, nothing is stored or logged, and no account is required. This makes the tool safe to use with private contracts and personal documents.
Why does my signature look faint or blurry on the PDF?
The signature is captured from the pad at a fixed pixel size, so drawing small strokes and then placing them very wide can look soft. For best results, draw your signature large on the pad, filling most of the box, and keep the placement width moderate. Uploaded signature images keep their own resolution; a clean scan or photo at least 600 pixels wide gives the sharpest result on the final PDF.