Automatically split a PDF at each bookmark or chapter boundary. Pick your split level, preview the full outline tree, and download all parts as named files in a ZIP. Completely free in your browser.
PDF files
Splitting a PDF by bookmarks means dividing a single document into separate files, where each split point matches a bookmark entry in the file's outline or table of contents. Instead of manually specifying page numbers, you let the bookmark structure drive the split. OneClickPDF reads the full outline tree from your PDF, lets you choose exactly which level to split on, shows a live split preview, and packages every named chapter into a ZIP — all inside your browser, without uploading your file anywhere.
How it works
Three steps. Upload your PDF, pick the bookmark level to split on, and download every chapter as a named file in a ZIP — all in your browser.
Drop your PDF onto the tool or click to browse and select it from your computer or mobile device. Your file loads directly into your browser's memory and nothing is sent to a server. The tool reads the embedded outline structure and displays the full bookmark tree on screen.
Review the split preview and pick which bookmark level to split on. Level 1 splits at top-level chapter headings; deeper levels split at subsections for finer granularity. The level picker adapts to your document's real outline depth, so you choose any level the outline actually contains. The preview updates instantly, showing each output part with its page range before you commit.
Click Split & Download ZIP and the tool processes your PDF entirely in the browser. It builds one file per bookmark section at the level you chose, names each file after its bookmark title, and packages everything into a single ZIP for one clean download. No waiting on a server, no email required, and your file never leaves your device.
Most online PDF tools either lack split-by-bookmarks entirely or make you create an account first. OneClickPDF gives you the full feature set with no login, no file upload, and no usage caps.
Before splitting, you see a live preview pulled directly from your PDF's outline, listing each output part with its title and exact page range. Verify the structure and confirm you are splitting at the right level before you download a single file.
Split at Level 1 (top chapters), or go deeper into subsections for finer granularity. The level picker adapts to your document's real outline depth, so it offers exactly the levels your PDF actually contains — no manual page-number entry, no fixed cap.
Each output file is automatically named after the bookmark it corresponds to, prefixed with a zero-padded number — for example report_03_Methodology.pdf. You set the prefix yourself (it defaults to your source filename), so there are no generic Part 1, Part 2 names to rename later.
If your PDF has a title page or table of contents before the first bookmark, those pages are not dropped. They are kept together as an Introduction file at the start of the ZIP, so every page of your original document survives the split.
All split files are packaged into a single ZIP for one-click download. No clicking through twenty individual downloads for a twenty-chapter book — grab the whole set at once and unzip when you are ready.
Every PDF operation runs locally in your browser using client-side JavaScript. Your document never leaves your device, which makes this tool safe for confidential reports, legal filings, and proprietary manuals. There is no account and no usage limit.
PDF bookmarks are embedded navigation anchors stored in the document's outline tree. When a PDF has a well-structured outline, splitting by bookmarks produces clean, self-contained chapter files with no guesswork required — no counting pages and no risk of cutting at the wrong point.
Automatic, not manual. Splitting by page range forces you to type out page numbers like 1-12, 13-27, and so on. Splitting by bookmarks reads the structural outline already embedded in your PDF and uses those boundaries directly. If your document has a table of contents or outline, this is the fastest way to break it apart.
Private by design. Other tools send your file to their servers the moment you hit upload. OneClickPDF never does. The entire operation runs inside your browser, so no third party ever sees your document — which matters for legal filings, financial reports, and anything confidential.
No bookmarks? No problem. If your PDF has no outline, the tool will tell you and point you to the regular Split PDF tool for page-range splitting. You can also add a structure first with the Edit Bookmarks tool, then come back and split by bookmarks.
Why choose ours?
Most competitors upload your file to their server. Ours processes everything in your browser — your documents stay on your device.
| Feature | Ours | Sejda | iLovePDF | SmallPDF | PDF24 | Adobe |
|---|---|---|---|---|---|---|
| Split by bookmarks | Paid | |||||
| Free & unlimited | 3/hr | Daily | — | — | $23/mo | |
| No account needed | — | — | ||||
| Files stay in browser | — | — | ||||
| Choose split level | — | — | ||||
| Bookmark tree preview | — | — | ||||
| Named output files | — | — | ||||
| ZIP download | — | — |
Competitor information was accurate at time of publication and may have changed.
No bookmarks in your PDF? split it by page ranges instead — or add an outline first with Edit Bookmarks, then merge, compress, or organize the result. Every tool runs in your browser, no account required.
Split PDF
Split a PDF into separate files by custom page ranges or every N pages, or extract just the pages you need — in your browser.
Edit Bookmarks
Add, edit, and organize the bookmark outline tree in your PDF.
Organize Pages
Drag and drop to reorder pages in your PDF.
Merge PDF
Combine multiple PDF files into a single document in seconds.
