Open DevTools.
Duplicate these pages.
Watch nothing get sent anywhere.
Tell it which pages to copy — each duplicate lands right after its original, everything else stays put — all inside this tab. Zero network requests after the page loads, same rule as every other tool here. Check the Network tab yourself.
Drop one PDF here or click to browse
One file at a time · stays on this device
Why trust this tool
No accounts
No signup, no email, no watermark. Use it and close the tab.
No limits (for now)
Duplicate as many pages as your device's memory allows. No artificial caps.
Deleting or reordering a PDF too? Both live.
Remove specific pages, or drag pages into a new order — same rule: everything stays local. Leave your email and we'll let you know about a Pro batch mode.
Thanks — saved locally for now, we'll be in touch once signups are live.
Repeating a page without retyping or rescanning it
Duplicate Pages copies whichever pages you specify and inserts each copy immediately after its original, using pdf-lib's copyPages — useful for repeating a signature page, a cover, or a form across a longer document without rebuilding it from scratch. The page-number picker is the same range/list syntax as Delete Pages, so if you've used that one, this one will feel familiar.
Because this grows the page count rather than shrinking or rearranging it, duplicating pages inside an already-large PDF (a hundred-plus pages, or pages full of scanned images) compounds the size the browser has to hold in memory. If a big source file makes the tab sluggish before you've even duplicated anything, this explains why, and how to keep it responsive.