The short answer
Add every file to Merge PDF, put them in order with the arrows, and save. Pages are copied across untouched, so nothing loses quality, and each file can become a bookmark so a long bundle stays navigable.
Runs in this tab, on pdf-lib and pdf.js, so your file is read from your own device and never sent anywhere. Check it yourself
Step by step
- Select all the files at once They arrive in your file manager’s order, which is usually what you want. Images can go in alongside PDFs and become pages.
- Set the order The list is the page order, top to bottom. Move a file with the arrows rather than re-adding it.
- Turn on bookmarks for a long bundle One entry per file, named after it. For a ten-document bundle this is the difference between usable and 200 pages of scrolling.
- Merge and check the seams Open the result and look at the first page of each section — that is where a wrong order shows.
- Fix anything crooked in one pass Organize PDF Pages reorders, rotates and deletes pages in the finished file, so a sideways scan or duplicate cover is a drag away.
Questions
Is there a limit on how many files I can merge?
No fixed limit — your device’s memory is the ceiling. Dozens of files and thousands of pages are routine.
Does merging reduce quality?
No. Pages are copied as they are, with no re-rendering or re-compression.
Can I merge only some pages of a document?
Extract the pages you want first, then merge the extracts.
More in Merge & Organize PDF Pages .