Merge PDFs
Combine multiple PDF files into one document — invoices, contracts, scanned reports, or transcripts. Free browser-based merger that runs locally.
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Select PDF files
You can select multiple files at once
Max file size: 100MB • Multiple files allowed
or drag and drop · press Enter to browse
How to Use
- Upload two or more PDFs to merge — invoices, scanned contracts, expense reports, university transcripts, or RFP bid packets all work
- Reorder files with the ↑↓ buttons or drag them into the right sequence (expense claims: by date; contracts: cover → clauses → annexes)
- Click "Merge PDFs" — pdf-lib processes everything in your browser, so confidential documents never reach a server
- The merged PDF downloads automatically with the original layout, text, and images intact
- Useful for monthly invoice bundles to your accountant, CV + reference letters for a job application, or compiling tender documentation
- If the final file is too large, run it through "Compress PDF" before attaching to email or uploading to a government portal
All processing is done in your browser, and files are never sent to a server.
Frequently Asked Questions
There is no specific limit on the number of files. However, since all processing happens in your browser, very large files may take longer to process.
Yes, the merge process preserves the original quality of each PDF. No compression or quality loss occurs during merging.
Yes, you can easily reorder files using the up and down arrow buttons before merging.
Absolutely. All processing happens locally in your browser. Your files are never uploaded to any server.
No. pdf-lib runs the merge inside your browser, so files never leave your device. Safe for contracts, invoices, and any confidential material.
Yes. Embedded fonts, images, hyperlinks, and bookmarks all carry over. Form fields and digital signatures may need re-validation after merging.
Run it through PDF Compress afterwards — scanned documents typically shrink 30–70%, fitting most 10–25MB mail attachment limits.