Merge PDF
Combine several PDFs into one file, in any order you like - and nothing ever leaves your browser.
How merging PDFs works here
This tool uses the pdf-lib engine running inside your browser tab. When you press Merge, each file is opened, every page is copied into a brand new document in the order shown, and the result is handed straight back to you as a download. There is no upload step and no server round-trip, so even a folder full of payslips or medical letters stays completely private.
Getting the order right
Order matters in a combined PDF - a cover letter should come before the report, and appendices last. After you add files, each row shows its name, size and page count. Use the up and down arrows to shuffle them until the sequence is correct, and remove any file you added by mistake with the cross. The page count total at the bottom tells you exactly how long the finished document will be before you commit.
Common uses
- Joining scanned pages that came out as separate files
- Bundling an invoice, receipt and delivery note into one attachment
- Combining chapters or sections exported individually
- Stitching a signed signature page back onto a contract
Need the opposite? The Split PDF tool pulls pages back out again, and Delete PDF Pages removes the ones you do not want. If your pages are sideways after scanning, Rotate PDF fixes the orientation. Starting from photos instead? JPG to PDF turns images into a single document you can then merge here.
Tips for a clean result
Merging never re-compresses your pages, so the combined file is roughly the sum of the originals - if size matters, shrink images before you convert them. Password-protected PDFs are opened where possible, but a file with heavy encryption may refuse to load; remove the password in your PDF reader first, then merge. Mixed page sizes are fine too: portrait and landscape pages, or A4 and letter, all sit happily in one document and keep their own dimensions.