Merge PDF Files Online

1. Upload 2 or more PDFs (up to 50 MB total).
2. Drag the files to reorder them (or use the up/down buttons).
3. Click 'Merge PDF' — takes 2-10 seconds.
4. Download the combined PDF.

Merging PDFs combines multiple documents into a single file without re-compressing content. Text stays searchable, images stay sharp, and the order is fully under your control.

Working with separate PDFs is inconvenient — reports from multiple sources, invoices from different vendors, or chapters split into multiple files. Merging combines everything into a single, shareable document that's easier to email, archive, and print. Text stays searchable, images stay sharp, and the combined file behaves like a natively-created single PDF.

The merger reads each PDF's internal structure, copies the pages into a new combined PDF, and preserves all metadata, bookmarks, form fields, and links. Page order follows the order you set in the UI. No re-compression occurs — text and images keep their original quality. Output is PDF 1.7.

• Combining multiple reports into one PDF.
• Merging invoices from different vendors.
• Joining scanned documents with digital ones.
• Assembling a portfolio from separate PDF pages.
• Combining chapters into a single e-book PDF.
• Creating a single submission from multiple attachments.
• Merging contracts with their appendices.

Merge is lossless — every PDF page is copied without re-compression. Text stays sharp, images retain their original resolution, and links work correctly. The output looks and behaves exactly like each source PDF.

• Encrypted or password-protected PDFs must be unlocked first.
• Digital signatures are invalidated by merging.
• Very large PDFs (100+ MB combined) aren't supported.
• Page-level metadata like page labels may not all be preserved.
• For splitting (opposite operation), use a PDF splitter.

• Output PDF opens in every browser, reader, and OS.
• Text stays searchable and selectable.
• Editable in Adobe Acrobat, PDF-XChange, Foxit.
• Printable with full fidelity.
• Accepted by every document management system.

• Drag to reorder files before merging.
• Combine scans and digital PDFs seamlessly — text stays searchable where it exists.
• For very large merges, work in batches of 3-5 files.
• Digital signatures are invalidated — sign AFTER merging.
• Batch-compress the result if it's over your size limit.

Encrypted PDF fails to merge

Remove the password protection first (open in Adobe Reader with the password, then save a copy).

Digital signature is broken after merge

Merging invalidates digital signatures. Re-sign the merged document instead.

Output is larger than expected

Merge is lossless — file size is the sum of the sources. Compress the merged PDF if needed.

• PDF Association — ISO 32000
• Adobe — PDF Reference