Automatically generate bookmarks in a PDF from headings
Detects headings by font size and automatically generates bookmarks (outlines) to make a PDF easy to navigate. Useful for reports, manuals and e-books. Free and local.
Choose your PDF
Drop here or click to choose
Files stay on your device — nothing is uploaded
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Your file is processed in your browser and never uploaded.
How does it work?
- 1
Choose your PDF
Drag the PDF here.
- 2
Set the minimum font size
Headings above this size are recognised as navigation items.
- 3
Detect and generate
Review the detected headings and generate the bookmarks.
- 4
Download
Download the PDF with embedded bookmarks.
Frequently asked questions
Does this work with scanned PDFs?
No. Scanned PDFs have no text layer and therefore no font information. Use the OCR tool first.
How many bookmarks can be created?
A maximum of 100 bookmarks per PDF.
Are my files uploaded?
No. Everything happens in your own browser. Your file never leaves your device and is not stored anywhere.
Is it free?
Yes, completely free, without watermark or account. The site is paid for by ads.
Why in the browser?
PDFrust runs entirely in your browser using WebAssembly and modern JavaScript libraries such as pdf-lib and PDF.js. Your file is never sent to a server — all processing happens locally on your device. This means your documents remain private by design, regardless of what they contain. There is no account required, no file size limit, and nothing is stored after you close the tab.
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