Everything you need to know about adding electronic signatures to PDF documents online with PDF Lab's free tool
Go to Sign PDF ToolThe Sign PDF tool adds your handwritten-style signature to a PDF without printing and scanning. You can draw your signature or upload a picture of it, place it anywhere, and sign as many pages as you need.
Click Draw Signature to open the signature pad, then sign with your mouse, touchpad, stylus or finger. When you are happy with it, add it to the page.
Yes. Click Add Signature Image and choose a PNG or JPG file. A PNG with a transparent background looks cleanest. Use Reuse Image to place the same signature again on other pages.
Yes. Drag the signature to position it on the signature line, and drag its corners to resize it.
Yes. Use the page buttons to move between pages and add signatures wherever you need them, for example initials on every page and a full signature at the end.
In many countries, including the UK, the US (ESIGN Act) and the EU (eIDAS), an electronic signature like this is legally recognised for most everyday documents. Some documents, such as certain deeds or official forms, need a witnessed, certified or qualified signature. If you are unsure, check with the person who asked you to sign.
This tool adds a visible signature. It does not add a certificate-based digital signature, which uses cryptography to prove who signed and whether the file has changed.
Yes. "Process locally (no upload)" is switched on by default. Your PDF and signature stay in your browser. Local mode works best with files up to about 50–100 MB. For very large files, switch it off to process on our server; the files are deleted automatically afterwards.
The signature becomes part of the downloaded PDF. To change it, start again from your original unsigned PDF.
Yes. Signing with your finger on a phone or tablet works well. It works in modern browsers on Android phones, iPhones and tablets.
In local mode, which is the default, nothing is uploaded. In server mode, your PDF and signature are used only to create the signed document, kept only temporarily and then deleted automatically. We never sell or share your documents or signatures.