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Sign PDF
Add electronic signatures to PDF documents.
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Frequently asked questions
Is Sign PDF really free?
Yes — Sign PDF is 100% free with no signup, no watermarks, and no usage limits on the basic version.
Is Sign PDF safe to use?
Your files are processed in your browser whenever possible and never stored on our servers.
Does Sign PDF work on mobile?
Yes — it works on iPhone, iPad, Android, Windows and Mac in any modern browser.
Do I need to install anything?
No. Sign PDF runs entirely in your browser. No download, no extension, no account.
What's the difference between Free and Pro?
Free covers the core Sign PDF features with reasonable daily limits. Pro removes limits, lifts the file-size cap, and unlocks batch processing and embed widgets.
Other ways people use Sign PDF
Popular long-tail searches — each opens a tailored landing page for that use case.
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