Sign any PDF online for free without Adobe Acrobat — draw, type or upload your signature directly in your browser, with no file ever leaving your device.
Open PDFWix's free Sign PDF tool in any modern browser — Chrome, Safari, Firefox or Edge — on desktop or mobile. No Adobe Acrobat, no DocuSign account and no signup are required. The tool runs entirely inside your browser, so the PDF you sign is never uploaded to a server.
Signing a PDF online usually means adding an electronic signature (e-signature) — a typed, drawn or image-based mark placed on the document. Electronic signatures are what most contracts, NDAs, offer letters and lease agreements actually require, and they are legally binding under the US ESIGN Act and the EU eIDAS regulation. A digital signature is a stricter cryptographic variant that uses a certificate to mathematically prove the signer's identity and lock the document against tampering — useful for regulated workflows like notarised documents or government filings, but overkill for everyday business paperwork.
Step 1: upload your PDF by dragging it into the dropzone or clicking Select file. Step 2: add your signature — draw with your mouse or finger, type your name in a handwriting font, or upload a transparent PNG of an existing signature; then drag it onto the page, resize it, and place initials, dates or checkboxes the same way on every page that needs signing. Step 3: click Download to save the signed PDF locally. The whole flow takes under a minute for a typical contract.
Common use cases include vendor and client contracts, NDAs, employment offer letters, HR paperwork (I-9, W-9, W-4, onboarding forms), freelance agreements, lease and rental agreements, SaaS order forms, partnership memos and consent forms. Anywhere a wet signature used to be required for ordinary business, an e-signature on a PDF is now the standard — faster, paper-free and easier to archive.
Print-sign-scan loses time, wastes paper and produces a noticeably lower-quality PDF with crooked pages and visible artifacts. A digital signature placed directly on the PDF stays crisp, keeps the file selectable and searchable, and arrives back to the sender in seconds rather than hours. PDFWix is free, requires no signup and runs in the browser, so the signed file never leaves your device.
Yes — electronic signatures are legally binding in the US, EU, UK, Canada, Australia and most other jurisdictions for ordinary business documents under laws like ESIGN (US, 2000) and eIDAS (EU, 2016). A handful of document types (wills, some real-estate deeds, certain notarised documents) still require wet ink — check local rules.
No. The Sign PDF tool processes everything in your browser using JavaScript and the local pdf-lib library — your file never reaches our servers, which is why the tool works offline once loaded and on confidential documents.
Yes. The tool is fully responsive and works in mobile Safari and Chrome — drawing a signature with your finger usually looks better than a mouse signature on desktop.