How to remove duplicate pages from a PDF: a step-by-step guide

Drop the PDFs anywhere on the page, or press Add files. Every page is read on arrival - the file list counts the duplicates of each file. The repeats are marked for removal, each with a badge naming the page it repeats; the first occurrence is never marked.

A page with text is compared by its text: the same text is a repeat however it was rendered, and different text - one changed figure on an invoice - is never one, however alike the pages look. A scan without text is compared by its look, and What counts as the same page decides how alike:

• Exact - only an identical repeat, the same file merged in twice;
• Normal (the default) - the same sheet scanned again: noise, a slight skew or another exposure still count as the same page;
• Loose - a rescan on another day or another scanner, a copy of a copy; check the marks, a look-alike form page may slip in.

The pages are read once; a change of setting re-judges them at once. A blank page is never matched - Remove blank pages from PDF is for those.

A click on a page changes its fate: a marked page is kept, an unmarked one is removed; Shift + click marks a run, and the field above the thumbnails takes page numbers. Your own marks stay when the setting changes. Back to detected drops them, Read again reads every page anew.

Press Remove duplicate pages. The line under the button counts the pages that go. The cleaned file is saved to your device at once - several files together as a ZIP. Bookmarks and links of the pages that stay are kept, and the removed pages are gone from the file, not only hidden.

Without an account, and with a free one, you can clean two files in a run, each up to 15 MB. With Pro there is no limit on the number or the size.

• Empty pages from a duplex scan? Remove blank pages from PDF.
• Pick other pages to remove? Delete Pages.
• Two versions to tell apart? Compare PDFs.