Is my PDF uploaded to a server?

No. PDFs are read as ArrayBuffers and processed entirely with pdf-lib in the browser. Stamping and saving happen locally with no network traffic.

What's the difference between 'Start number' and 'Apply to pages'?

'Start number' controls the first label shown (start = 5 means page 1 gets '5'). 'Apply to pages' is the set of physical pages to stamp at all. So range `2-4` + start `1` puts 1, 2, 3 on physical pages 2, 3, 4 respectively.

Is `{total}` the size of the applied range?

No, it's the total page count of the entire PDF (= getPageCount). That matches the usual '1 / 10' convention. To restrict the denominator, hard-code a literal in the template instead.

Can I use Japanese in the format?

Not in this version. The built-in text path uses Helvetica (Latin only). Non-Latin support would need font embedding plus a different stamping path.

Does it support encrypted PDFs?

Not yet. Run them through pdf-unlock first, then pipe the result here.

Can I set the position in millimetres?

Margins are specified as a percentage of page width (e.g. 4% on A4 ≈ 24pt ≈ 8mm). A physical-unit input isn't exposed yet.

Back to PDF

PDF page numbers — template / 9 positions / range

Stamp page numbers onto every page of a PDF. The format is a free template (`{n}` / `{n} / {total}` / `Page {n}` etc.). Tune the placement (9-grid), font size, color, starting number, margin, and which page range to apply to. Runs entirely on pdf-lib in the browser — your files never leave the device. Batch processing and ZIP download supported.

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How to use

Drop your PDFs, then pick a format preset or write a custom template (`{n}` for current page, `{total}` for total pages). Choose a placement (6 corners/edges), font size, color, starting number, margin, and the page range to apply to (`all` or `1-3,5,7`). Click Add page numbers to stamp each page. Batch processing and a single ZIP download are supported. Runs on pdf-lib in the browser — your PDFs never leave the device.

FAQ

Is my PDF uploaded to a server?: No. PDFs are read as ArrayBuffers and processed entirely with pdf-lib in the browser. Stamping and saving happen locally with no network traffic.
What's the difference between 'Start number' and 'Apply to pages'?: 'Start number' controls the first label shown (start = 5 means page 1 gets '5'). 'Apply to pages' is the set of physical pages to stamp at all. So range `2-4` + start `1` puts 1, 2, 3 on physical pages 2, 3, 4 respectively.
Is `{total}` the size of the applied range?: No, it's the total page count of the entire PDF (= getPageCount). That matches the usual '1 / 10' convention. To restrict the denominator, hard-code a literal in the template instead.
Can I use Japanese in the format?: Not in this version. The built-in text path uses Helvetica (Latin only). Non-Latin support would need font embedding plus a different stamping path.
Does it support encrypted PDFs?: Not yet. Run them through pdf-unlock first, then pipe the result here.
Can I set the position in millimetres?: Margins are specified as a percentage of page width (e.g. 4% on A4 ≈ 24pt ≈ 8mm). A physical-unit input isn't exposed yet.

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