Merge PDF
Combine multiple PDFs into a single document. Reorder, merge, and download instantly.
Drag your PDFs here or click to select
Up to 20 files, max 50MB each
When to Use This Tool
Combine multiple PDF files into a single document. This tool runs entirely in your browser — no uploads, no server processing, and your files never leave your device.
Merging PDFs is one of the most common document tasks. Whether you are assembling a multi-section report, combining signed contract pages from different parties, or consolidating scanned documents into one file, this tool handles it without installing any software.
The merge preserves the original quality of every page — text remains selectable, images stay sharp, and form fields keep their data. Page order follows the order you add the files, and you can reorganize before merging. There is no limit on the number of files you can combine, though processing time increases with total page count.
Common use cases include combining monthly financial statements into a quarterly report, merging chapters written by different team members, assembling training materials from separate sources, and collecting signed forms from multiple contributors into one archive document.
How to Merge PDF
- Upload your PDF files (drag & drop or click to browse)
- Drag the files into the desired order using the visual list
- Choose whether to keep basic metadata from the first file
- Click Merge and download your combined PDF instantly
Features
- Multiple PDF input with drag & drop support
- Visual file reordering with simple up/down controls
- Preserves page dimensions, content quality, and formatting
- Keeps basic metadata from the first file
- Progress indicators and estimated final file size
- 100% browser-based processing (no server uploads)
Things to Know
Merging files with different page sizes (Letter and A4) is supported — each page keeps its original dimensions. Encrypted PDFs cannot be merged; unlock them first using the Unlock PDF tool. Bookmarks and table of contents from individual files are not carried over to the merged document. Very large merges (50+ files) may take longer depending on your device.
Frequently Asked Questions
What happens to bookmarks when I merge PDFs?
Bookmarks from the first PDF are preserved, but bookmarks from subsequent files are typically not carried over. After merging, you may need to rebuild bookmarks manually using a PDF editor if your document requires them for navigation.
Can I merge PDFs with different page sizes?
Yes. The merge tool preserves the original page size from each source file. Your merged PDF will contain a mix of page sizes (A4, Letter, custom) exactly as they appeared in the original documents. This is useful when combining reports and appendices with different formatting.
Is there a limit to how many PDFs I can merge?
There's no hard limit in the tool, but your browser's memory will constrain very large operations. Merging 20-30 standard PDFs typically works smoothly. If you're merging hundreds of files or documents with hundreds of pages each, consider merging in smaller batches to avoid browser slowdown.
Does merging reduce PDF quality?
No quality reduction occurs. Merging simply arranges pages from source files into a new document structure without re-encoding images, recompressing content, or rendering pages. Text remains selectable, images stay sharp, and all formatting is preserved exactly as in the originals.
Can I merge password-protected PDFs?
Not directly. You must first unlock each password-protected PDF using our Unlock PDF tool, then merge the unlocked files. The merge tool cannot read encrypted content without the password, so unlock all protected documents before combining them.
What order do the pages appear in after merging?
Pages appear in the exact order of the files you upload and arrange. If you upload File A (10 pages), then File B (5 pages), then File C (3 pages), your merged PDF will have 18 pages: pages 1-10 from File A, pages 11-15 from File B, and pages 16-18 from File C. Always verify the file order before merging.
Built for combining reports, invoices, and multi-part documents into a single file. Continue with Compress PDF or Add Page Numbers.
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