PDF page numbers

How to use it

1. Drop one PDF on the card, paste with ⌘V / Ctrl+V, or press “Choose PDF”. Page numbers are added immediately with the default settings — bottom center, “1 / N”, every page, starting at 1. There is no Apply button.
2. Click one of the six position buttons and pick a format. The paper preview updates instantly; the numbered PDF rebuilds a moment later. Open “More options” to skip a cover page, change the first number, font size, margin or color.
3. The status turns green and says “Page numbers ready · N pages” when the new PDF is built. Download it, or open “Preview” to check the real result. The output is named after the source file plus “-numbered.pdf”; the original is never modified.

Example

Bottom center · 1 / N
Every page, starting at 1

report-numbered.pdf
Page 6 shows 6 / 6
First page 2 → page 2 shows 1 / 5

Page labels use Latin digits and are never translated. The PDF title and metadata stay as they were; the output name is the source name plus “-numbered.pdf”.

Rules, limits and known issues

• Nothing is uploaded: the PDF is read with the File API and numbered in this tab. The page sends no network request, writes nothing to storage and keeps no history — a reload starts empty.
• Adding page numbers changes the bytes, so digital signatures are no longer valid. PDF/A, PDF/X and other conformance markers are not guaranteed to be preserved.
• One PDF at a time. Batch processing and merging several files into one numbering sequence are not supported.
• Numbering always runs from the first numbered page to the last page of the document. Arbitrary page ranges, odd/even differences and restarting the sequence partway through are not supported.
• Existing page numbers are not detected. Running the tool on an already numbered file adds a second set; the original numbers are not removed.
• Formats are “1”, “1 / N” and — in English only — “Page 1 of N”. Chinese and Arabic word templates, custom text and font families are not available because the standard PDF fonts used here contain only Latin glyphs.
• Page labels always use Latin digits (0–9). Arabic-Indic digits are not supported for the same font reason.
• Scanned pages and blank pages are numbered too. There is no OCR and the page content is not analysed.
• Page content, annotations, forms and bookmarks are preserved because the page is edited in place. Severely malformed PDFs are not repaired, and password-protected PDFs are rejected — remove the password and save a fresh copy first.
• Rotated pages are handled: the number is drawn upright and lands in the corner you chose as it appears on screen. Crop boxes with a non-zero origin are supported.
• The paper preview is an illustration, not a render of your page. Check the real result with “Preview” or by downloading the PDF.
• Limits: one PDF, 50 MB and 2,000 pages. Larger files are rejected. Files over 20 MB or 300 pages show a “may take a few seconds” hint, and numbering runs on the main thread, so the tab can feel busy while it works.
• The output name replaces path separators, control characters and reserved characters with “-”, trims the ends, cuts long names and appends “-numbered.pdf”; the source file itself is never modified.

Related tools

Other document tools that also run entirely inside this tab.