How to overlay one PDF onto another
Overlaying one PDF onto another draws the first page of one file, the layer, on top of every page of another, the base. It is for applying a stamp, a fixed header drawn in another program or an approval seal to a whole document without redrawing it page by page. On BestPDFInTheWorld it takes four steps: pick the base, pick the layer, decide on transparency and overlay. The layer is drawn in the bottom-left corner of every page, at its original size, with no automatic scaling or centring. All processing runs in your browser, the file never leaves your computer. This tool is part of the Premium subscription, EUR 1.99 a month, which removes the limits on every tool and adds OCR. Sign PDF opens on the free plan, with one signature a day.
Verified 2026-08-12
- Four steps, nothing to install: pick the base, pick the layer, set the transparency, overlay and download.
- The first page of the second file is drawn on top of every page of the first, the same layer, repeated everywhere.
- The layer keeps its original size, stuck to the bottom-left corner: no automatic scaling or centring.
- Optional 50% transparency, so the content underneath stays readable through the layer.
- No uploads: all processing runs in the browser, and the tool keeps working offline once the page has loaded. This tool is part of the Premium subscription, EUR 1.99 a month, which removes the limits on every tool and adds OCR. Sign PDF opens on the free plan, with one signature a day.
How to overlay one PDF onto another, step by step
Overlaying one PDF onto another draws the first page of one file (the layer) on top of every page of another (the base). The Overlay PDF tool does this in under a minute:
- Open the Overlay PDF tool.
- Pick the base file, the first PDF. All of its pages stay in the result.
- Pick the layer, the second PDF. Only its first page is used, even if it has more; set the transparency if you like before moving on.
- Press overlay and download the whole base, with the layer drawn on every page. The processing runs on your computer, not on a server.
Nothing to install, no account and no upload wait. The result appears instantly.
The layer's size and position: what to expect
The layer is drawn in the bottom-left corner of every base page, at its original size. There is no automatic scaling or centring: a layer smaller than the base leaves space around it, and a bigger layer spills off the sheet, what spills off stays in the file, it just stops being visible, the same as with margin cropping.
If you need the layer to match the base exactly, prepare it beforehand with the Page size tool. And if you want the mark in another position, prepare the layer with that spacing already built in.
Tips for overlaying PDFs
- Put the mark on the first page of the layer file. Only the first page is used, so draw the stamp, the header or the seal on page one.
- Use transparency for stamps over text. At 50% opacity, the content underneath stays readable through the layer. Without transparency, the layer is drawn at full opacity and can fully cover whatever is in the same spot.
- The layer cannot be blank. A page with no marks drawn on it at all, no text, no line, no image, has nothing to embed, and the tool refuses to overlay nothing. Check that the page you picked really has something drawn on it.
- It works offline. Once the page has loaded once, you can overlay PDFs with the network off, the work is all done by your processor, and nothing is sent to servers.
Overlaying is not merging
Overlay draws one file on top of the other; merging concatenates documents, one after the next. To combine several PDFs into one, use the Merge PDF tool.
If what you need is repeated text on every page, a "CONFIDENTIAL" mark over the content, the Watermark tool does that from a text box, without preparing a layer file. And to add an image, such as a logo or a signature, have a look at the Add image to PDF tool.
Is overlaying PDFs free? What are the limits?
No. This tool is part of the Premium subscription, EUR 1.99 a month, which removes the limits on every tool and adds OCR. Sign PDF opens on the free plan, with one signature a day.
| Plan | What it allows |
|---|---|
| Free plan | Only Sign PDF opens without paying, with one signature a day and files up to 10 MB. |
| Premium (EUR 1.99/month) | This tool is part of the subscription: no limits anywhere, plus OCR and larger batches. |
Questions about overlaying PDFs.
How do I overlay one PDF onto another?
Pick the base file first, then the layer file, set the transparency if you like and press overlay. The layer's first page is drawn on top of every page of the base, and you get the result to download.
Does the layer always end up in the same spot?
Yes, in the bottom-left corner of every page, at its original size. There is no automatic scaling or centring: if the layer is smaller than the base, there is space around it; if it is bigger, it spills off the sheet.
The second PDF had several pages. What happened to the rest?
They were ignored. Only the layer's first page is embedded and drawn, and that is the point of the tool: the same mark, a stamp, a header or a seal, repeated across every page of the base.
What does the transparency field do?
It lowers the layer's opacity to 50%, so the content of the page underneath stays readable through it. Without transparency, the layer is drawn at full opacity and can fully cover whatever is in the same spot.
Do I need an account to overlay a PDF?
Yes. The account (magic link, no password) is needed for the subscription. This tool is part of the Premium subscription, EUR 1.99 a month, which removes the limits on every tool and adds OCR. Sign PDF opens on the free plan, with one signature a day.
Does this put two PDFs one after the other?
No. Overlay draws one file on top of the other; to join documents one after the next there is the Merge PDF tool, which concatenates pages without drawing anything on top.
Are my files kept on your servers?
No. Nothing is sent to a server: the processing runs in your browser, start to finish. Since nothing is sent, nothing is kept outside your computer.
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A stamp you need
on every page?
Open the tool and try it. Nothing to install, nothing sent anywhere.
Open Overlay PDF