Are NanoTools completely free to use?

Yes, all basic tools on NanoTools are completely free to use with no registration required. We offer premium features for power users.

Is my data secure when using NanoTools?

Your files are processed securely and are automatically deleted after processing. We do not store your files or data on our servers.

No installation required. All tools work directly in your browser on any device - computer, tablet, or smartphone.

We support a wide range of formats including PDF, JPG, PNG, WebP, GIF, JSON, XML, CSV, and many more depending on the tool.

Sign PDF online for free. Add digital signatures to PDF documents. Legally binding electronic signatures.

Drop PDF to sign here or click to browse

.pdf, application/pdf • Max 50MB

1
Upload PDF file
Select the document you need to sign
2
Create signature
Upload image, draw, or type your signature
3
Position signature
Place signature in the correct location and resize as needed
4
Download signed PDF
Save the document with your signature applied

1

Select the document you need to sign

2

Upload image, draw, or type your signature

3

Place signature in the correct location and resize as needed

4

Save the document with your signature applied

Electronic signatures are legally binding in most jurisdictions. Check local laws for specific requirements.

Yes, you can add multiple signatures to different pages or locations.

Signatures are not stored. Each signing session requires creating or uploading your signature again.

Yes, timestamps can be added automatically with your signature.