Add PDF bookmarks
Give a document an outline a reader can navigate it by.
Drop files here
Or paste them, or pick them from this device. Nothing is uploaded: the work happens in this tab.
Files in this tab
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Options
Each heading, the page it goes to, and how far it is indented.
Write the bookmarks
Add a file to get started.
What this does
A two-hundred-page report with no bookmarks is a report nobody can move around in: the reader’s sidebar is empty and finding chapter nine means dragging a scrollbar past two hundred pages. Every PDF reader made in thirty years shows an outline, and almost nothing that produces a PDF writes one. Give each heading a title, the page it goes to and how far it is indented, and the file comes back with a navigation pane that works.
What it will not do
Every tool here says what it cannot do, in its own words, before you rely on it.
- A bookmark goes to the top of a page. The zoom and scroll position an author chose for one of the document’s own bookmarks is kept; a bookmark added here has none.
- Levels are followed, not checked. A level that skips a rank — a 1 followed by a 3 — is taken in one rank rather than refused, because a reader’s sidebar cannot show the difference.
- This writes the outline a reader’s sidebar shows. It draws no contents page into the document itself.
- Replacing the bookmarks removes every one the document had, including any that pointed at a named destination rather than at a page.
Questions people ask
How do I make a section sit under a chapter?
Give the chapter level 1 and the section level 2. Levels nest in the order you list them, so a level 2 hangs under the level 1 above it.
Can I take a document’s existing bookmarks off?
Yes. Leave the list empty and keep "replace the existing bookmarks" on, and the file comes back with none.
Is my file uploaded anywhere?
No. The work happens in this browser tab, on your own machine. There is no server in this product to send a file to, which is why the promise is checkable rather than something you have to take on trust: open your browser's network panel and watch it do the work without making a request.
Is there a size limit, or a limit on how many files?
None that we impose. The limit is your own machine's memory, because that is where the work happens — a few hundred megabytes is comfortable on a laptop, and less on a phone. There is no daily task counter, no queue and no account.
What does it cost, and what is the catch?
Nothing, and there is no paid tier that unlocks features: the whole product is the free one. That is affordable because running it costs us nothing — your computer does the work — so there is no per-file cost to recover, no advertising and no data to sell.