Sign PDF Online Free
Add legally binding e-signatures to any PDF. Draw with mouse/finger, type, or upload. Free, no signup, secure, downloads instantly.
About Sign PDF
Sign PDF lets you draw, type, or upload a signature and place it anywhere on a PDF — all in your browser, with no uploads. The signature capture uses an HTML5 Canvas with smoothed stroke rendering, or one of 6 stylistic fonts (Dancing Script, Pacifico, Caveat, Satisfy, Georgia, Trebuchet MS) loaded from Google Fonts for typed signatures. Saved signatures persist in localStorage (up to 3 at a time) so you don't have to re-draw each time. The final signature is embedded as a high-resolution PNG into the PDF via pdf-lib, producing a clean output with no watermarks or branding.
Beyond the signature itself, the tool supports date stamps in 4 formats (MM/DD/YYYY, DD/MM/YYYY, YYYY-MM-DD, Month DD YYYY), 5 signature colors (black, blue, red, green, purple), and multiple signature placements per document (useful for contracts that need initials on every page plus a full signature at the end). Everything runs client-side — your signed document never leaves your device, which is legally important for sensitive contracts where the signature itself could be exfiltrated if uploaded to a third-party server.
Key Features
- Three signature modes — draw on canvas, type with stylistic font, or upload an image
- 6 stylistic fonts for typed signatures (Dancing Script, Pacifico, Caveat, Satisfy, Georgia, Trebuchet MS)
- 5 signature colors (black, blue, red, green, purple)
- Signature persistence via localStorage — save up to 3 signatures for reuse across documents
- Date stamps in 4 formats — MM/DD/YYYY, DD/MM/YYYY, YYYY-MM-DD, Month DD YYYY
- Multi-placement — add your signature on multiple pages in one session
- Runs in browser via pdf-lib — signed documents never upload
- Zero watermarks — output PDF has no branding or trial stamps
How to Use Sign PDF Online Free
- Step 1: Drop your PDF into the editor. The first page renders as a preview.
- Step 2: Create a signature: draw it with your mouse or finger, type it and pick a font, or upload an image of an existing signature
- Step 3: Pick a color (black is standard) and optionally save the signature for reuse
- Step 4: Click where you want the signature on the page, drag to resize, and drop. Repeat on additional pages if needed (e.g., initial every page).
- Step 5: Optionally add a date stamp in your preferred format, then click Save & Download. pdf-lib embeds everything into a clean PDF.
Who Uses This Tool
- Real estate agents signing and returning purchase offers
- Freelancers countersigning client contracts and NDAs
- HR departments getting offer letter acceptances on file
- Lawyers executing client engagement agreements
- Small businesses signing vendor contracts and SOWs
- Individuals signing leases, waivers, and consent forms
Why Choose PDF AI Tools
We've built PDF AI Tools to replace expensive desktop software like Adobe Acrobat for 95% of common document workflows — at zero cost to you. Unlike competitors who gate features behind paywalls, add watermarks, or limit file sizes, our tools are genuinely free and genuinely unlimited. Your privacy matters: files processed client-side in your browser never touch our servers, and even AI-powered features use encrypted, auto-deleting processing pipelines.
Frequently Asked Questions
Is a signature drawn on this tool legally valid?
In most jurisdictions (US ESIGN Act, EU eIDAS for "simple electronic signature" tier), a drawn signature on a PDF is legally binding for ordinary contracts, waivers, and agreements. For high-stakes documents (real estate, wills, some corporate filings), jurisdictions sometimes require a qualified or certified digital signature issued by a trust service provider — our tool does not produce those. Check with your legal counsel for high-stakes signing.
Does my signature get uploaded to your server?
No. The entire signing workflow runs in your browser. Your signature is captured on a canvas, stored in your browser's localStorage if you save it for reuse, and embedded into the PDF via pdf-lib locally. Neither the signature nor the document ever touches our servers, which matters for sensitive contracts.
Can I sign the same document in multiple places (e.g., initial every page)?
Yes. Create the signature once (or save it for instant reuse) and then click-to-place on any page. For contracts that need initials on every page plus a full signature at the end, save two signatures: one "initials" and one "full name" — both stay in localStorage until you clear them.
What if I need someone else to sign the document too?
Save the signed PDF from your session and send it to the other party. They can open this tool, add their own signature, and save the fully-signed result. For workflow-heavy cases with multiple required signers, a full e-signature platform like DocuSign or SignWell is better suited — this tool is optimized for personal and one-off signing.
Why do typed signatures have only 6 fonts?
Those 6 are loaded from Google Fonts and cover the realistic signature style spectrum: formal cursive (Dancing Script, Pacifico), casual handwritten (Caveat, Satisfy), and standard serif/sans (Georgia, Trebuchet MS) for people who prefer print. Adding arbitrary fonts would require web-font licensing checks and larger page loads.
Can I add a date, initials, or text alongside the signature?
Yes. The tool has optional text fields for date (4 format presets), initials, and any custom text — all placed as overlays the same way the signature is. Useful for contracts that require "Name, Date, Signature" blocks.