Sign PDF
Sign PDF documents online by drawing, typing or uploading your signature. Free PDF signing tool with secure browser-based processing.
Sign PDF documents online for free using your mouse, touchscreen, or keyboard - then place your signature anywhere on any page. Entirely browser-based, no signup required. Your signed PDF is generated locally and never uploaded to any server.
Upload your PDF to get started — no sign-up required.
How to Sign a PDF Online
- Upload your PDF - drag it onto the editor or click Choose PDF File.
- Click Add Signature in the toolbar. Choose Draw (mouse or finger), Type (styled font), or Upload (PNG/JPG image).
- Create your signature and click Place Signature - it appears on the current page.
- Drag to reposition and drag the corner handle to resize. Add more signatures on any page, then click Download.
Why Use PDFCrush?
- Three signature modes: draw with mouse or touchscreen, type in a handwriting font, or upload a saved signature image
- Place signatures on any page and resize them to fit perfectly
- Full undo support - remove any signature with one click
- Runs entirely in your browser - your signed PDF never leaves your device
Your Privacy & Security
The signature editor uses pdfjs-dist and pdf-lib running locally in your browser. No document data is transmitted to any server.
Frequently Asked Questions
Does drawing my signature cause image pixelation when applied to the canvas?
No. Your input track is captured as an unflattened vector path coordinate line SVG). It retains high visual clarity and scales sharply to match any sizing window without showing jagged edges or pixelation.
Can I sign multiple areas of a long contract file simultaneously?
Yes. Once you create or upload your signature template asset inside the workspace, you can easily drop clone blocks across multiple pages and line items instantly.
Are these signatures legally binding for official business agreements?
Yes. This tool creates valid electronic signature overlays compliant with basic electronic signature guidelines. Note that for transactions requiring cryptographic token tracking, you may need a specialized hardware PKI signature tool.
Is a biometric recording or trace of my signature saved on a server database?
No. Your signature trace coordinates are rendered onto the document canvas directly within your browser tab session. No signature image assets or vector tracks are stored on an external server.
Can I type my name and convert it into a stylized cursive signature script?
Yes. The keyboard signature tool includes cursive typography fonts that turn your text input into clean signature overlays automatically.
Can I upload a smartphone photo of my physical ink signature?
Yes. The photo signature feature supports transparency adjustments, letting you upload images of physical signatures and drop them onto the page canvas cleanly.
How do I scale or resize the signature overlay block to fit thin contract lines?
Every signature block features corner scale boundaries. You can drag these handles to scale down the dimensions while keeping the image proportions crisp.
Will adding an electronic signature alter filled text fields or data values?
No. The signature overlay adds a distinct element layer onto the document structure without modifying or resetting existing text fields.