How are watermarks, page numbers and page sizes changed in a PDF?
A watermark, header, footer or page number is content drawn onto each page — text or an image appended to the page's content stream, or added as a stamp annotation — so it becomes part of the page like the original text, printed and copied with it. Page size and margins are separate: ISO 32000 defines them through the MediaBox and CropBox rectangles, so resizing a page or adding a margin changes those boxes and scales or offsets the existing content rather than redrawing it.
Read the guide: How to Edit a PDF Without Uploading It
How to use PDF Header & Footer
- Drop a PDF.
- Fill the zones you need.
- Set size, colour and margin.
- Click "Add header & footer" and download.
PDF Header & Footer features
- Six zones: header and footer × left, centre, right
- Placeholders {n}, {total}, {file}, {date}
- Font size, colour, margin, optional rule line
- Page selection
- Arabic and Hindi text supported
- Local processing
PDF Header & Footer example
File name left, date right, page numbers in the footer
Input:
Header left: {file}, header right: {date}, footer centre: {n} / {total}Output:
minutes-header-footer.pdf — every page carries the running header and "3 / 12" style footerFrequently asked questions about PDF Header & Footer
Which placeholders can I use?
{n} counts the pages you selected, starting at 1, and {total} is the number of selected pages — so with all pages selected they are the page number and the page count, while with "2-" physical page 2 prints 1. {file} is the file name without extension and {date} today’s date in your language. Any other text is written as typed.
Will the header overlap existing content?
The text sits inside the margin you set (28 pt by default). If a page already prints to the edge, increase the margin or shrink the pages first with Resize PDF Pages.
Can I add only a footer?
Yes — leave the header zones empty. Any zone can be left blank.
Is my PDF uploaded to a server?
No. The file is opened and processed by your browser with WebAssembly and JavaScript; nothing is sent to Mutqan Soft or anyone else. Close the tab and the file is gone. Downloading the result needs a free account — no subscription, no payment.
Can I use it on a password-protected PDF?
Yes, if you know the password: the file list asks for it once and every operation then works on the decrypted pages. The output is saved without a password unless you protect it again.
Technical notes
Each zone is drawn as a single line in the visual frame with the shared text engine (bidi-aware, embedded fonts). {date} is formatted with Intl.DateTimeFormat for the page language before it reaches the engine, so the PDF carries localised text, not a code.
References
- ISO 32000-2:2020 — Document management — Portable document format — Part 2: PDF 2.0The current PDF standard: file structure, objects, pages, fonts, annotations, forms and encryption.
- PDF Reference — ISO 32000-1:2008 (PDF 1.7), Adobe copyThe freely readable PDF 1.7 specification: page trees, content streams, metadata, permissions and the standard security handler.