PDF Merge
Combine multiple PDF files into one document. Fast, free, browser-based.
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Why Merge PDFs?
A single PDF is easier to share, print, archive, and email than 20 separate files. Most business workflows require document bundles — and most online forms accept only one PDF upload.
Common scenarios: tax returns with multiple receipts/W-2s/1099s, job applications (resume + cover letter + portfolio), visa applications with photo + passport + financial docs, contracts with appendices, scanned book chapters, monthly invoice bundles, research papers with supplementary materials.
How to Use
- Drag & drop 2 or more PDF files (or click to browse).
- Files merge in the order shown — drag to reorder.
- Click Merge PDFs — pages combine into a single file.
- Download the merged PDF.
Privacy: All processing runs in your browser via PDF-Lib. No uploads to any server — safe for sensitive documents (contracts, financials, medical records).
Merge tips
- Order matters — preview the file list before merging
- Cover sheet first — for formal submissions, put title page before content
- Naming convention — prefix files numerically (01-cover.pdf, 02-resume.pdf, ...) for easy multi-select drag
- Large bundles — split into 2-3 PDFs for emails (Gmail/Outlook limit ~25 MB), merge full bundle for archive
- After merging — use a PDF compressor (e.g., Adobe Acrobat, Smallpdf) if size matters
Merge vs ZIP
Merge when files form one logical document with reading order — tax bundle, job application, contract package. ZIP when files are independent units that should stay separate — photo collections, deliverable assets, mixed file types.
FAQ
Is there a file size limit?
No hard limit, but very large PDFs (100+ MB combined) may be slow since processing runs in your browser. For multi-GB merges, use desktop tools (Adobe Acrobat, qpdf, pdftk).
Will bookmarks and links be preserved?
Page-level structure is preserved. Internal hyperlinks (cross-references between pages of the same source PDF) and bookmarks may be lost during merge — this is a limitation of browser-based PDF processing. For full bookmark preservation, use desktop Adobe Acrobat.
Can I merge password-protected PDFs?
No — encrypted PDFs are not supported. Decrypt them first using a desktop tool, then merge.
Can I rearrange pages within a single PDF?
Not directly — this tool only combines whole PDFs. To rearrange pages, use PDF Split first to extract pages, then merge in the desired order.
Will the merged file be smaller than the sum?
Slightly — merge deduplicates internal resources (fonts, images shared across PDFs). But typically the merged file is ~95-99% of the sum of inputs, not significantly smaller. For dramatic size reduction, use a PDF compressor afterward.
⚠️ Reference Only
Output is generated based on your input and is provided for reference. Results may vary depending on your specific use case, edge cases, or environment-specific behavior. We do not guarantee accuracy of conversions, validations, or computed values.
Always verify critical outputs against official documentation or production environments. We are not responsible for any decisions or losses based on these tool results.