Combine multiple PDF documents into a single file. Reorder pages before merging. Processing stays 100% in your browser — zero uploads.
🔒 Private — no uploads⚡ Instant — no waiting∞ Unlimited pages
How to Merge PDFs Online
Drop your PDF files onto the merger above. You can add as many PDFs as needed. Use the up/down arrows to reorder the files in the exact sequence you want, then click Merge. The result is a single combined PDF downloaded directly to your device.
Why use FileConvertIt to merge PDFs?
Unlike cloud-based PDF mergers, FileConvertIt processes everything inside your browser using WebAssembly. Your documents are never transmitted to any server. There are no file size limits enforced server-side — the only limit is your browser's available memory.
Frequently Asked Questions
How many PDFs can I merge at once?
There is no hard limit on the number of PDFs you can merge. You can combine 2, 10, or 50 PDFs in a single operation. The practical limit is your browser's available RAM — typically 1–4 GB on modern computers, which is sufficient for hundreds of typical PDFs.
Will the merged PDF preserve all content — images, fonts, links?
Yes. FileConvertIt merges PDFs at the raw content stream level using pdf-lib. All page content including images, embedded fonts, hyperlinks, bookmarks, form fields, and annotations is preserved exactly as in the original files.
Can I merge password-protected PDFs?
Password-protected PDFs must be unlocked first before merging. Use the PDF Unlock tool to remove the password, save the unlocked version, then merge it with other documents.