PDF Signature Adder - Sign Documents Online Free

Add signatures to PDF documents in your browser. Draw, type, or upload signatures. Position anywhere, resize freely. Completely private, no uploads.

Signature Method

Draw Type Upload

Saved Signatures

No saved signatures yet

Add date stamp

Drag & drop your PDF here or click to browse

All processing happens in your browser - your files never leave your device

Security: Only process files from sources you trust. All processing happens locally in your browser.

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Frequently Asked Questions

This tool supports three signature types: hand-drawn signatures using your mouse or touchscreen, typed signatures with customizable fonts, and uploaded signature images (PNG, JPG, or scanned signatures). Each method produces a signature that can be positioned and resized anywhere on your PDF pages.

This tool creates visual signatures (sometimes called wet signatures) that are legally acceptable for many documents. However, they are not cryptographic digital signatures with certificate validation. For contracts requiring cryptographic signatures (like DocuSign), you'll need specialized digital signature software. Visual signatures are valid for invoices, forms, letters, and most business documents.

Yes, you can add unlimited signatures to your PDF document. Place different signatures on multiple pages, add initials alongside full signatures, or include date stamps. Each signature can be independently positioned, resized, and rotated before finalizing your document.

Completely secure. All PDF processing happens entirely in your browser using JavaScript. Your original PDF and signed PDF never leave your device or get uploaded to any server. Once you close the browser tab, all data is cleared from memory. This is ideal for confidential contracts, NDAs, and sensitive documents.

Yes, you can save your drawn, typed, or uploaded signature to your browser's local storage. Once saved, your signature can be quickly applied to future PDFs without redrawing or re-uploading. Saved signatures are stored only on your device and can be deleted anytime.

This tool adds visual signatures (images of your signature placed on the PDF), similar to signing a printed document. Digital signatures use cryptographic certificates to verify identity and detect tampering. Visual signatures are faster and work for most situations, while digital signatures provide legal non-repudiation for high-stakes contracts and regulatory compliance.

Yes, signatures remain editable until you download the final PDF. Click any placed signature to select it, then drag to reposition, use corner handles to resize, or rotate using the rotation control. You can also delete signatures and start over if needed. This flexibility ensures perfect placement every time.

No, the tool preserves all original PDF content, formatting, fonts, and layout. Signatures are added as overlays on top of existing content without modifying the underlying document structure. Text remains selectable, and all interactive form fields continue to work (though adding signatures may flatten some form fields depending on PDF structure).

Yes, the tool includes an optional date stamp feature that adds the current date next to your signature. You can customize the date format (MM/DD/YYYY, DD/MM/YYYY, or ISO format), font size, and position. This is useful for contracts, invoices, and legal documents that require both signature and date.

Adding signatures typically increases PDF file size by 10-100KB depending on signature complexity and image quality. Hand-drawn and typed signatures create minimal overhead, while uploaded high-resolution signature images may add more. The tool optimizes signatures automatically to balance quality and file size.

PDF Signature Adder - Sign Documents Online Free

Signature Method

Saved Signatures

Selected Signature

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