Sign PDF

Create electronic signatures and sign PDF files online.

How to Use Sign PDF

Upload your file: Drag and drop your file into the active processing area above, or click the box to browse your device files.
Configure settings: Select your preferred options (such as target file size in KB, compression level, page order, or output format).
Process locally: Click the primary action button. Your file is rendered and encoded in seconds directly inside your browser memory.
Download output: Click Download to save the modified document back to your device. No watermarks are added.

Zero-Cloud Privacy Guarantee

Unlike legacy web utilities that upload your sensitive documents to remote servers, PDFtiny executes 100% of processing inside your local browser using WebAssembly. Your files never leave your computer, ensuring complete privacy, enterprise compliance, and offline availability.

Technical Specifications

Parameter	Specification
Processing Engine	Client-Side WebAssembly (WASM) & HTML5 File API
Server Transmission	0 Bytes Uploaded (100% Local Browser Memory)
Device Compatibility	Chrome, Safari, Firefox, Edge, Android, iOS, Windows, Mac, Linux
Compliance	ISO 32000-2:2020, GDPR Article 25 (Privacy by Design)

Frequently Asked Questions

How can I create my signature on PDFtiny?

You have 3 easy options: draw your handwritten signature using mouse or touchscreen, type your name and pick a calligraphic script font, or upload an image of your signature on paper.

Are electronic signatures created on PDFtiny legally valid?

Yes, electronic signatures created in compliance with the US ESIGN Act, EU eIDAS regulation, and Indian IT Act 2000 are valid for everyday agreements, contracts, and business forms.

Can I add dates, initials, and checkboxes alongside my signature?

Yes, you can place text annotations, today\

Is my signed document sent to any server?

No. The signature is rendered and permanently embedded into the PDF using client-side JavaScript. Your signed contract never touches our servers.