Add Stamp to PDF Free Online

About Add Stamp To PDF

Add professional stamps to PDF pages — APPROVED, DRAFT, CONFIDENTIAL, RECEIVED, PAID, or custom text stamps. PDF AI Tools applies stamps in the browser with customizable size, color, rotation, and opacity.

Unlike annotation stamps that can be removed in any PDF reader, PDF AI Tools stamps are embedded in the page content layer — providing a more persistent indicator that cannot be accidentally deleted.

Key Features

• Pre-built stamps: APPROVED, DRAFT, CONFIDENTIAL, RECEIVED, PAID, COPY, VOID
• Custom text stamps with any message
• Adjustable size, color, rotation, and opacity
• Apply to all pages or a custom range
• Corner, center, or diagonal placement
• Content-layer embedding (not removable annotation)
• Preview before applying
• Multiple stamps per page

How to Use Add Stamp to PDF Free Online

1. Step 1: Upload your PDF to the Stamp PDF tool
2. Step 2: Choose a pre-built stamp or enter custom text
3. Step 3: Set size, color, rotation, and position
4. Step 4: Preview and apply — download the stamped PDF

Who Uses This Tool

• Stamp invoices as PAID after receiving payment
• Mark document drafts with a DRAFT watermark during review
• Apply APPROVED stamp to signed-off documents
• Stamp COPY on duplicate documents in a filing system

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