Merge fails or times out
Ensure each file is under 20MB and you have 2–10 files. Try again with fewer or smaller PDFs.
PDF Merger – Combine Multiple PDFs
Merge up to 10 PDF files into one document. Each file max 20MB. No sign-up required.
Input file
Converted result
Daily limits: 7 for guests, 15 for signed-in users.
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We combine 2 to 10 PDFs into one document in the order you upload. Each file max 20MB. Your files are deleted immediately after processing.
- No registration required
- Files deleted immediately after processing
- Max 20MB per file
- Free to use
Your files are automatically deleted immediately after processing. No manual cleanup is required.
How to Merge PDFs
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Upload 2 to 10 PDF files (each max 20MB) in the order you want.
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Click merge. ConvertFloor combines them into one document.
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Page order and quality are preserved.
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Download the merged PDF. Your files are not stored.
What this tool does
Upload between 2 and 10 PDF files (each up to 20MB) in the order you want them in the final document. Click merge and we combine them into a single PDF on our servers. The merged file is ready to download; we do not store your files on our servers after processing, and they are deleted immediately after processing. Page order and quality are preserved so you get one continuous document from multiple sources. If the combined file is too large to email or upload, use our Compress PDF tool to reduce its size.
If the output is not what you expected, try a cleaner source file, then run the conversion again.
When to use this vs other tools
- When you need to combine invoices, reports, or chapters into one file
- When you have scanned pages or multiple PDFs to join in order
- When you want one document for sharing or archiving
- When merging contract appendices, forms, or presentations
- When consolidating drafts or feedback into a single PDF
Common problems and fixes
Wrong page order in result
The order you upload is the order in the merged PDF. Re-upload in the correct sequence.
Some pages missing or corrupted
Use PDFs that open correctly in a reader. Password-protected or damaged files may not merge properly.
FAQ
How many PDFs can I merge?
Up to 10 PDF files, each 20MB or smaller. Upload in the order you want them in the final document.
Is my data secure?
Files are processed securely and deleted immediately after processing. We do not store your files on our servers after processing.
Can I change the order after uploading?
Upload order defines the result order. To change it, clear and re-upload in the desired sequence.
Is this tool free?
Yes, with reasonable usage limits. No registration required.
Does this work on mobile?
Yes. The merger is fully responsive and works in mobile browsers.
The merged PDF is too large. What can I do?
Run the merged file through our Compress PDF tool to reduce size before emailing or uploading.
Can I merge and then split the PDF?
Yes. After merging, you can use our PDF Split tool to extract individual pages or ranges into separate files if needed.
Real-world use case
Common for combining invoices, contracts, or chapter PDFs into one shareable file.
Edge cases
- Password-protected PDFs cannot be merged until unlocked.
- Some scanner-generated PDFs may fail parser compatibility.
Manual vs tool
Manual print-to-PDF workflows are slower and can reduce quality; merge keeps original pages.
Limitations
Corrupted or encrypted source PDFs may stop merge processing.
Practical tips
- Arrange files in final reading order before merging.
- Open merged file to verify page sequence immediately.
What this tool does
This tool combines separate PDFs into one clean file in your chosen order. It is useful when teams send chapters separately, when vendors send invoices as multiple files, or when you need one submission package instead of ten attachments.
How to use
- Upload 2 to 10 PDFs in final reading order.
- Run merge and wait for a single output file.
- Download and verify page sequence quickly.
- If file gets heavy, run Compress PDF next.
When to use this vs other tools
Use PDF Merge when your goal is one combined file. Use PDF Split if you need separate pages from one source. Use Delete PDF Pages when you only need to remove selected pages from a single document.
Common problems and fixes
Wrong order is the most common issue, so rename files with numeric prefixes before upload. If merge fails, check for corrupted or password-protected PDFs. If output is too large for email, compress the merged file right after download.
FAQ
Can I merge scans and normal PDFs together? Yes, as long as each file is valid PDF and under limits.
Does merge reduce quality? Merge itself preserves content; compression is a separate step.
Can I split the merged file later? Yes, use the PDF Split tool afterward.
Why PDF merge sometimes fails
Most merge failures are not random. They come from password-protected files, damaged exports, or huge uploads pushed at unstable network speeds. If one file keeps breaking the job, test that file alone in a viewer first. If it opens with warnings, repair or re-export it before merging.
Another issue is bad document order. Teams merge quickly, then send legal packets with pages out of sequence. Use numeric filenames before upload and do a fast page spot-check after merge. It takes 30 seconds and saves painful rework later.
PDF Merge vs Split vs Delete Pages
Use merge when you want one combined file. Use PDF Split when you need separate exports from a single PDF. Use Delete PDF Pages when your file is mostly right and only a few pages should go. If the merged output is too large, finish with Compress PDF.
Try another tool
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