Add a Cross-page Seal to PDF
Distribute slices of a stamp image across fanned page edges. Adjust the coverage and geometry using the preview, then apply the visual seal to the PDF pages.
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Fan-out Page Seal
Click or drop a local PDF
Fan-out Page Seal · Source File
🟥 Click or drop a cross-page seal image
Transparent-background PNG/JPG recommended
💡 For best results, use a white-background stamp image with Multiply mode
Preview: first-page thumbnail (purple lines = fanned page edges; red line = stamp's right edge; drag the stamp to move it)
First Page Coverage
0.33
Total Rotation (°)
3°
Vertical Step (mm)
5
Last Page Margin (mm)
5
Some organizations require the last-page seal to overlap the text. Adjust its horizontal position here.
Stamp Width (mm)
Opacity100%
Blend Mode
📌 How it works:
1️⃣ Open a PDF to read the total page count N automatically.
2️⃣ Open a cross-page seal image (a transparent PNG is recommended).
3️⃣ In the preview, drag the stamp to adjust its position and coverage, or use the right-hand sliders for precise control.
4️⃣ On the preview canvas, use the scroll wheel to fine-tune the rotation angle.
5️⃣ Click "Apply to All Pages and Save" to create a PDF with a cross-page seal slice on each page.
6️⃣ Blend Mode: Normal covers the page directly; Multiply simulates a real stamp, and stamp images with a white background work best, allowing black text to show through naturally. Darken is similar for a solid red stamp on white, but gradients or shadows may create hard edges. Multiply is recommended.
1️⃣ Open a PDF to read the total page count N automatically.
2️⃣ Open a cross-page seal image (a transparent PNG is recommended).
3️⃣ In the preview, drag the stamp to adjust its position and coverage, or use the right-hand sliders for precise control.
4️⃣ On the preview canvas, use the scroll wheel to fine-tune the rotation angle.
5️⃣ Click "Apply to All Pages and Save" to create a PDF with a cross-page seal slice on each page.
6️⃣ Blend Mode: Normal covers the page directly; Multiply simulates a real stamp, and stamp images with a white background work best, allowing black text to show through naturally. Darken is similar for a solid red stamp on white, but gradients or shadows may create hard edges. Multiply is recommended.
Seal Slice on Each Page (use page navigation)
Page - / -
How to use this tool
- Open a PDF and a cross-page seal image, preferably a transparent PNG.
- Drag the stamp in the first-page preview to set its position and coverage.
- Adjust total rotation, vertical step, stamp width and last-page margin; inspect the page slices.
- Click Apply to All Pages and Save.
Frequently asked questions
Can I adjust the seal on the last page?
Yes. The last-page margin setting adjusts the horizontal placement of the final seal slice, for example when it needs to overlap nearby text.
Does a cross-page seal provide certificate-based signing?
No. This tool places a visual image-based seal across pages. It does not create or validate a cryptographic digital signature.