Can I sign a PDF without creating an account?

Yes, tools like PDF24, PlumeDocs, and Scrixo all let you sign PDFs without requiring an account or login.

Are free PDF signature tools safe to use with sensitive contracts?

Free tools can be safe if they use SSL-secured transfer and delete files after processing, as PDF24 does. For highly sensitive documents, a tool that keeps files entirely on your device, like PlumeDocs, may be preferable.

What signature types can I add to a PDF?

Most tools let you draw a signature with a mouse or finger, type your name in a signature font, or upload an image of a handwritten signature.

Do free PDF signers add watermarks to the signed document?

Some free tools add watermarks, but Scrixo and PDF24 explicitly state no watermark on the downloaded file.

Can I add a digital certificate to make a PDF legally binding?

PDF24 provides functionality for adding verifiable digital certificates that enhance the legal authenticity of the document. Other tools focus on visible signatures rather than certified digital signatures.

PDF Tools4 options compared

Sign PDF

Signs PDF documents by adding visible signatures and digital signature certificates, making them legally binding and tamper-proof. Business professionals, legal experts, and individuals looking to secure their documents for contracts, agreements, or personal records can benefit from this tool. It simplifies the process of creating trustworthy PDFs, ensuring compliance with legal requirements and...

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Editors’ Top PickBased on community votes

PDF Candy

pdfcandy.com

Adds digital signatures to PDF documents.

Open PDF Candy Read review →

Other OptionsRanked by votes

02
02
PDF24
pdf24.org
Adds visible signatures and digital signature certificates to PDF documents.
Open site View details
03
03
PlumeDocs
plumedocs.com
Sign a PDF in your browser: draw, type or upload your signature, place it on any page, and add a date, text or checkm...
Open site View details
04
04
Scrixo
scrixo.com
Sign a PDF online free. No login, no printing, no watermark. Draw or type your signature in the browser and download ...
Open site View details

Side by side

Sign PDF options compared

Tool	Best for	Strengths	Limitations
PDF Candy pdfcandy.com	Free PDF signing without registration	Free to use Simple interface with text, drawing, and image signature options	Ads on the page Requires sign-in to continue
PDF24 pdf24.org	Free PDF signing with digital certificates	100% free with no hidden costs SSL secured transfer, files deleted after one hour No registration or subscription traps	Advertising-supported Fewer unit options compared to paid tools
PlumeDocs plumedocs.com	Private PDF signing without uploads	Files stay on device, never uploaded No sign-up required Supports date, text, and checkmarks	Smaller community, fewer advanced features
Scrixo scrixo.com	Quick PDF signing without account	No login required No watermark on download Draw or type signature options	Basic feature set, not a full document suite

Buyer's guide

How to choose a sign pdf

When picking a PDF signing tool, first decide whether you need a visible signature for visual approval or a digital certificate for legal tamper-proofing. If you sign documents frequently and want zero cost with no account hassle, choose a free tool that supports both options. If privacy is your top priority, pick a browser-based tool that keeps files on your device and deletes them automatically after processing.

Questions

Sign PDF FAQ

Can I sign a PDF without creating an account?: Yes, tools like PDF24, PlumeDocs, and Scrixo all let you sign PDFs without requiring an account or login.
Are free PDF signature tools safe to use with sensitive contracts?: Free tools can be safe if they use SSL-secured transfer and delete files after processing, as PDF24 does. For highly sensitive documents, a tool that keeps files entirely on your device, like PlumeDocs, may be preferable.
What signature types can I add to a PDF?: Most tools let you draw a signature with a mouse or finger, type your name in a signature font, or upload an image of a handwritten signature.
Do free PDF signers add watermarks to the signed document?: Some free tools add watermarks, but Scrixo and PDF24 explicitly state no watermark on the downloaded file.
Can I add a digital certificate to make a PDF legally binding?: PDF24 provides functionality for adding verifiable digital certificates that enhance the legal authenticity of the document. Other tools focus on visible signatures rather than certified digital signatures.

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