Merge multiple PDFs into one file online. Unlimited pages and files, processed locally in your browser — documents never leave your device.
TL;DR: Free PDF merge tool: combine multiple PDFs in order with unlimited pages, processed locally with no upload.
This tool runs entirely in your browser. Open DevTools → Network panel and search your input — it appears in no request.
使用指南
Combine multiple PDFs into one: contracts plus appendices, report archives, scans in sequence. This tool merges at the structure level (no re-render, byte-faithful), with no page limits, fully local.
1. Merge flow
- Drop multiple PDF files.
- Reorder with the arrows — list order is final page order.
- Merge and download.
2. Worth checking before merging
- Mixed orientations: landscape and portrait pages stay mixed after merging (fidelity, not a bug) — flip through before sending.
- Encrypted files: unlock password-protected PDFs first, or they fail.
- Duplicate versions: make sure v1 and v2 did not both get dragged in — the classic multi-file slip.
FAQ
No. Merging copies page structures without re-rendering — output is byte-identical to the sources.
No hard limit. Processing is local, so the ceiling is your device memory — typical documents are effortless.
Never. The merge happens entirely in your browser — the core difference from most online tools.