PDF Stamp Tool Online Free

When this workflow is enough

This workflow is enough for routine visible PDF marks such as PAID, RECEIVED, APPROVED, DRAFT, company seals, and review labels.

When this workflow is not enough

It is not enough for cryptographic signatures, notarized workflows, identity verification, or legally certified approval records.

Practical guidance

Preset stamps are useful when a document needs a clear, repeatable workflow label such as PAID, RECEIVED, APPROVED, DRAFT, CONFIDENTIAL, VOID, or COPY. Use an authorized custom image when the mark is a company seal, signature image, or brand-specific label. A transparent PNG normally integrates better with the page than an image with a white background.

Choose the page range before fine-tuning appearance. A mark that works on every body page may not belong on a cover, appendix, landscape table, or scanned attachment. The normal stamp can be placed separately on a current page where the document needs a different position; preview representative pages before you generate the output.

Size, opacity, and rotation should support readability rather than decoration. Keep business fields, dates, totals, signature blocks, QR codes, headers, and footers readable. Browser-based processing is practical for ordinary files, but very large PDFs or image-heavy scans can require more device memory and time. Keep the browser open until generation finishes.

The browser workflow is designed to process ordinary stamping tasks locally whenever possible, but local processing is not a substitute for your own file-handling policy. Reopen every exported PDF. If generation fails, reduce the file size or page range, retry with a current browser, and check the source PDF for password protection or damage before using another workflow.

Step-by-step guide

1. Choose the PDF and wait for the preview to become available in the browser.
2. Select a preset stamp for a standard status or upload an authorized transparent PNG for a custom seal or signature image.
3. Set the page range first, including any pages that must be excluded such as a cover or attachment.
4. Adjust size, opacity, rotation, and page placement while keeping business fields and document text readable.
5. Review representative portrait, landscape, scanned, and text-dense pages; use per-page positioning where necessary.
6. Generate the PDF, reopen the download at normal zoom, and check page count, placement, clarity, and any pages that were intentionally excluded.

Common mistakes

• Using a preset mark where an authorized company-specific image is required, or using a custom image without permission.
• Stamping all pages before excluding a cover, appendix, attachment, or pages that must remain unmarked.
• Using one placement without checking landscape, scanned, or text-dense pages.
• Setting size or opacity so aggressively that important text becomes hard to read.
• Closing the browser or assuming a large file has failed before local generation has finished.
• Sharing the file without reopening the export to check page range and visual result.

Frequently asked questions

Key takeaways

• Use preset stamps for quick office workflows.
• Upload custom images for company seals or signatures.
• Preview before export.
• Visible stamping is not legal certification.

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