Why "gm" flags by default?

g = find all matches; m = ^ and $ match line boundaries (most heading patterns want this). Add i for case-insensitive.

How does this differ from Auto-Bookmark from Headings?

Font-size detection fails on uniform-font documents. Pattern detection works whenever your headings have a recognisable text shape — even if visually they look identical to body text.

Are the files uploaded?

No — local extraction + regex matching.

Bookmarks from Regex Pattern

Scan a PDF for text matching a regex pattern (e.g. "Chapter \d+", "Section [A-Z]\.") and create a bookmark for each match, jumping to the page where it appeared.

Your files never leave your browser. All processing happens on your device — nothing is uploaded.

1. Upload your file

Drop a PDF file here

or click to browse

How does the Bookmarks from Regex Pattern work?

Scan a PDF for text matching a regex pattern and add a bookmark for each match. Default pattern matches "Chapter N" headings; change it to suit your document — `^Section [A-Z]\.` for legal sections, `^\d+\.\s+\w+` for numbered headings, `^[A-Z][A-Z\s]+$` for ALL-CAPS lines. Each match becomes a bookmark with the matched text as its title, pointing at the page where it was first seen. Different from Auto-Bookmark from Headings (which uses font-size detection) and Add Bookmarks from CSV (which uses an explicit list). Powerful when your document follows a consistent format the heading-detector misses.

🔒 Security & Privacy

All processing happens on your device. Your files never leave your browser, never touch our servers, and are not stored anywhere. Close the tab and the file is gone.

📱 Use it on any device

Works in any modern browser — Mac, Windows, Linux, iPhone, Android, and tablets. No installation, no app to download. Just open the page and start.

⚡ Quick & easy

Drag, drop, click. Most files process in seconds, not minutes. No watermarks added to your output, no per-day limits, and the tool always shows the result before asking you to download.

🎁 Always free, no signup

Free to use, every time. No account creation, no email required, no “trial” that converts to a paid plan. We make money from ads so you don’t have to pay.

Frequently asked

Yes — JavaScript regex flavour. Common cheats: \d = digit, \s = whitespace, \w = word char, ^ = start of line (with m flag), $ = end of line, [A-Z] = uppercase letter, + = one-or-more, * = zero-or-more.