Add Stamp to PDF

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100% Browser-Based • Local Processing

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Stamp
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Stamp Type

Adjustments

Position Presets

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Overview

Stamp a PDF with "Approved", "Paid", or your own seal

Add Stamp to PDF places a stamp on a PDF in your browser. Build a round rubber stamp like "APPROVED / OFFICIAL", or upload your own seal or logo, then drag, resize, and rotate it where you want and download. Everything runs on your device — nothing is uploaded.

Choose Create Round to generate a classic circular rubber stamp: type the top text (like APPROVED) and bottom text (like OFFICIAL), pick a colour, and the tool draws it for you. Or switch to Upload Image to use your own seal, signature block, or logo — a transparent PNG looks cleanest. Either way, the stamp appears on the page where you can drag it into place, resize it with the corner handles, and rotate it for a natural, hand-stamped angle.

Fine-tune with an Opacity slider for a subtle, official look, and choose where it lands with Position Presets (a corner or centre). Lock Position Globally keeps the stamp in the same spot across pages, and a Pages to Apply field lets you stamp only certain pages — for example, just the signature page.

Everything runs locally, so contracts and certificates never leave your device. The result carries no Randomly.online branding — only your stamp — and there's no signup. Your original file stays unchanged.

A quick note on what to use when: a stamp is a placed mark of status or authority; a watermark is a page-wide background/overlay; and a signature is your personal sign-off. Pick the one that matches your intent.

Use Cases

When a stamp helps

Guide

How to add a stamp to a PDF

Step 1: Upload your PDF

Drag it in or click Select PDF. Thumbnails and a page canvas appear.

Step 2: Choose the stamp

On Create Round, type the top and bottom text and pick a colour; or on Upload Image, add your seal/logo (transparent PNG recommended).

Step 3: Place it

Drag the stamp on the canvas, resize it with the corner handles, and rotate it. Use a Position Preset for a quick corner/centre placement, and set the Opacity.

Step 4: Target pages

Enter a Pages to Apply range (or leave empty for all), and toggle Lock Position Globally to keep it in the same spot on each page.

Step 5: Download

Click Download PDF.

Realistic example. An invoice needs a red "PAID" mark. Use Create Round with top text "PAID", bottom text the date, red colour, drag it to the top-right, set opacity around 0.9, apply to page 1, and download.

Advanced tip. For your own circular seal, upload a transparent PNG so only the seal shows — then rotate it a few degrees for an authentic, hand-applied look.

Common mistake to avoid. A fully opaque stamp over text can hide it — lower the opacity or move the stamp to a clear area.

Recommendation. Need a signature instead? Sign PDF. A page-wide mark? Add Watermark.

Support

Frequently Asked Questions

How do I add a stamp to a PDF?

Upload the PDF, choose a stamp — build a round one or upload a seal image — then drag it onto the page, resize and rotate it, and click Download PDF. You can set the opacity and target specific pages. Everything runs in your browser with no upload.

How do I create an APPROVED or OFFICIAL round stamp?

Use the Create Round option, type your top text (such as APPROVED) and bottom text (such as OFFICIAL), and pick a colour. The tool draws a classic circular rubber stamp for you. You can then place, resize, and rotate it on the page like any stamp.

Can I upload my own seal or logo?

Yes. Switch to Upload Image and add your seal, signature block, or company logo. A PNG with a transparent background works best, because only the seal shows rather than a square box around it. Then drag, scale, and rotate it into position.

How do I move, resize, and rotate the stamp?

The stamp appears on the page with handles: drag the middle to move it, pull a corner handle to resize, and use the rotate handle to angle it. A slight rotation gives an authentic, hand-applied look. Position presets also place it in a corner or the centre in one click.

Can I stamp only specific pages?

Yes. Use the Pages to Apply field and enter a range like "1-3, 5", or leave it empty to stamp every page. This is handy when only a signature page or the first page needs the stamp.

What does "Lock Position Globally" do?

With it on, the stamp stays in the same position on every page you apply it to — ideal for a consistent seal or "DRAFT" mark across a document. Turn it off if you want to place the stamp differently on different pages.

How do I set the transparency?

Use the Opacity slider. A slightly reduced opacity gives a realistic, official look and lets any content underneath stay readable, while full opacity makes the stamp bold and solid. For stamps placed over text, lower the opacity so the words remain legible.

What's the difference between a stamp, a watermark, and a signature?

A stamp is a placed mark of status or authority (APPROVED, a seal) you position on the page — this tool. A watermark is a faint, page-wide background or overlay. A signature is your personal sign-off. Choose the one that matches what you're trying to convey.

Are my files uploaded — is it safe?

No. The stamp is applied entirely in your browser, so the PDF and any seal image never leave your device or reach a server. That matters for contracts and official documents. Closing the tab clears everything from memory.

Can I add a stamp on my phone's browser?

Yes. The tool works in any modern browser on iPhone or Android — no app needed. You can drag and place the stamp by touch. Precise resizing and rotating are easier on a larger screen, so a laptop is more comfortable for detailed placement.

Is it free, with no watermark or signup?

Yes. The tool is free, adds only your stamp (no extra branding), and needs no account. Build or upload your stamp, place it, and download — no paywall before the download.

Does it change my original PDF?

No. The tool creates a new stamped file for you to download; your original stays exactly as it was on your device. Keep the original if you'll need an unstamped version later.

Still have questions?

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