Plain Tools

Sign PDF

Add a visual signature to PDF pages locally using draw or typed input. Private browser processing with no uploads. Files never leave your device.

Privacy and trust

Processed locally in your browser. Files never leave your device.

  • Processed locally in your browser
  • Files never leave your device
  • No account required for local processing

Visual signature placement only. This is not a cryptographic certificate workflow.

What this tool does

Sign PDF runs in your browser for local, private document handling. Process files directly on your device without a server-side upload step for core workflows.

  • Draw or type a signature
  • Page and position controls
  • Local PDF stamping
  • No-upload signing workflow

When to use Sign PDF

  • Prepare documents quickly before sharing or archiving.
  • Handle privacy-sensitive files without third-party upload workflows.
  • Run practical browser-first tasks on desktop or mobile.

Quick start

  • Upload the file or files you want to process.
  • Choose options based on your output goal.
  • Run processing locally in your browser.
  • Download and review the output before sharing.

Need a walkthrough? Open practical guides in Learn or verify local processing behaviour in Verify Claims.

Tool workspace

Upload your file, choose options, and download the processed output in the result area.

Loading tool workspace...

Result experience

When processing finishes, a download action appears below. If output quality is not ideal, adjust options and run again.

Known limitations

Visual signature placement only. This is not a cryptographic certificate workflow. For complex files, run a quick output check before sharing or archiving.

Learn more about this workflow: How to Sign a PDF Without Uploading It

Related resources

Continue with related tools, comparisons, and practical guides.