Add Bookmarks to PDF Online — Create Clickable PDF Navigation Free

PDF bookmarks (also called outlines) are clickable navigation links that appear in a sidebar panel. They let readers jump directly to specific pages, chapters, or sections — like a clickable table of contents built into the PDF file.

A table of contents is a visible page within the PDF. Bookmarks are a separate navigation panel in the PDF reader sidebar. WhiskFile creates bookmarks (outline entries) that function like a clickable table of contents without adding extra pages to your document.

Yes. Bookmarks (outlines) are a standard PDF feature defined in ISO 32000. They work in Adobe Acrobat, Preview, Chrome, Firefox, Foxit, and all other PDF readers. Colors and bold/italic styles are visible in Adobe Acrobat and other advanced readers.

Yes. Create up to 4 levels of nesting — chapter, section, subsection, sub-subsection. Use Tab to indent and Shift+Tab to outdent. Set the open/closed state to control whether nested bookmarks start expanded or collapsed.

Yes. Three import methods: JSON (full control over page, level, color, style, destination), CSV (title,page,level format), or paste an indented table of contents. The tool auto-detects page numbers and indentation levels.

Yes. Each bookmark can have a custom color (5 presets + color picker) and bold/italic styling. These are standard PDF bookmark properties visible in Adobe Acrobat, Foxit, and other advanced readers.

Destination types control how the page displays when clicking a bookmark. 'Fit Page' shows the whole page, 'Fit Width' fits the page width to the window, and 'Inherit Zoom' keeps the current zoom level. WhiskFile lets you choose between these destination types when creating bookmarks.

Yes. Upload a PDF with existing bookmarks and they're automatically detected and loaded. Edit titles, change pages, reorder, add new bookmarks, change colors and styles, or delete unwanted ones. Full undo/redo support.

No. WhiskFile processes everything in your browser using client-side JavaScript. Your PDF never leaves your device — no upload, no server storage, no data retention. This is safer than server-based tools like Sejda or PDF24.

Adobe Acrobat Pro requires a $19.99/month subscription and desktop installation. WhiskFile is free, works in any browser, and uniquely offers import from JSON/CSV/paste TOC — features Adobe lacks. Both support colors, styles, hierarchy, and destination types.

No. WhiskFile provides a full-featured bookmark editor free in your browser — with hierarchy, colors, styles, destination types, import/export, and undo/redo. No subscription, no installation, no account required.

Yes. Toggle the folder icon in each bookmark's settings to set whether it starts expanded or collapsed when opening the PDF. This is useful for long documents where you want top-level chapters visible but sections collapsed.

Yes. Full undo/redo with Ctrl+Z and Ctrl+Shift+Z keyboard shortcuts. Unlimited history lets you experiment freely and revert any change — adding, deleting, reordering, or editing bookmarks.

Yes. Create PDF Bookmarks on WhiskFile is completely free with no account required. Free users get 7 tasks per day with files up to 50 MB. There are no watermarks on any plan. Pro plans ($4.99/month) unlock unlimited tasks, 500 MB files, batch processing, and API access.

Yes. Create PDF Bookmarks runs entirely in your browser using WebAssembly. Your files are never uploaded to any server — they stay on your device throughout the entire process. No data is transmitted, stored, or accessible to WhiskFile or any third party.

Yes. Create PDF Bookmarks works on any device with a modern browser — iPhone, Android, iPad, tablets, Chromebooks, and desktop computers. No app download required. The interface adapts to your screen size automatically.

Create PDF Bookmarks accepts PDF files as input and produces PDF output. The maximum file size is 50 MB on the free plan (500 MB for Pro users). There are no page count limits.