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Edit Bookmarks / Outline

Add, edit, reorder and nest PDF bookmarks, or build them from the headings in the text.

Free, no uploads, no sign-up. Runs 100% in your browser.

How Edit Bookmarks / Outline works

The existing outline is read with pdf-lib and shown as an editable list. Build from headings reads the text with PDF.js and picks lines set in larger type. Saving writes a fresh nested outline.

Input: PDF. Output: PDF.

How to use Edit Bookmarks / Outline

1. Drop your PDF onto the Edit Bookmarks / Outline area, or click to choose it.
2. Wait a moment while page thumbnails render locally.
3. Choose the pages and options you need. Previews update as you go.
4. Press the main action button and download the finished PDF.

Tips

• Encrypted PDFs must be unlocked first with Unlock PDF.
• Large scanned PDFs are mostly images. Compress PDF shrinks them the most.
• Your original file is never modified; you always download a new copy.

Edit Bookmarks / Outline FAQ

Are my files uploaded?

No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.

Is it free? Are there limits or watermarks?

Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.

Does it work offline?

Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.

Related tools

• PDF Reader: Fast viewer with search, zoom, thumbnails and outline.
• Split PDF: Split by ranges, every N pages, or extract each page into a ZIP.
• PDF Viewer Preferences: Set the opening page, zoom, page layout, side panel, full screen and toolbar options.
• Merge PDF: Combine multiple PDFs into one ordered document with drag-and-drop sorting.