Merge PDFs without losing quality
Merging PDFs is one of the most common tasks at work and school: attaching certificates to your CV before applying for a job, assembling thesis chapters into a final document, or combining monthly invoices for your accountant. Unlike many tools that turn pages into images, ours copies pages exactly as they are — text stays selectable and searchable, and links, fonts and original quality remain untouched.
How to merge PDF files
- Drag PDFs into the box or click it to choose them. You can add more files at any time.
- The page count of each file appears. Reorder files by dragging or with the arrows; the first file in the list starts the document.
- Optionally give the output file a name.
- Enable the blank-page option if you'll print double-sided, so each file starts on a fresh sheet.
- Click “Merge files” to download the combined PDF.
Why use ABCTools to merge?
- True merging, no rasterizing: pages keep their original structure, so file size doesn't balloon and text stays crisp.
- Confidential: contracts, financial and personal documents are never uploaded — everything happens in your browser.
- Very fast: merging files with hundreds of pages takes seconds.
- No watermark, no sign-up: the output is clean and completely free.
Password-protected files
If a file is encrypted with an open password, the tool can't read it and will flag it as “Damaged or protected”. Open it in a PDF reader with the password, save an unprotected copy and try again. Files that only carry editing restrictions (no open password) can usually be merged.
Complementary tools
- Need to remove unwanted pages before or after merging? Use Delete & Reorder PDF Pages.
- Have images to add? Convert them with Image to PDF first, then merge.
- Output too big? Try Compress PDF.
Frequently Asked Questions
Will my files look different after merging?
No. Pages are copied exactly, including text, fonts, links and images, with no conversion or compression.
How many files can I merge?
Any number. The practical limit is your device memory; dozens of files and hundreds of pages usually merge without issue.
Does it work on mobile?
Yes, on Android and iPhone browsers. Pick files from the Files app, then tap merge to download the result.
Are my files safe?
Yes. Files are never uploaded; they are read and merged inside your browser and downloaded straight to your device.
Why does it say “Damaged or protected”?
That appears when a file is encrypted with an open password or is corrupted. Remove the protection first or re-save the file.
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