Merge PDF Tool
Combine 2–10 PDFs into a single document in the exact order selected.
Merge multiple PDFs into one document in your browser. Free online PDF merger for up to 10 files with page count and instant download.
Calculator Inputs
About Merge PDFs
Combine 2–10 PDFs into a single document in the exact order selected.
Select between two and ten PDFs in merge order, optionally name the output, and press Calculate. Each file is validated (PDF type, 50 MB cap), then pages are copied in order into a fresh document you can download immediately.
Processing uses the pdf-lib writer loaded from CDN, but your files stay in browser memory. Text and images carry over; encrypted files need their password removed first, and form fields flatten to plain content.
Where it is used
Merging scanned batches, assembling reports from chapters, combining invoices, and bundling application documents.
How to use the Merge PDFs
- Select PDFs (2–10, in merge order) — select a file (application/pdf,.pdf) — Each PDF up to 50 MB. Files never leave your browser..
- Output Filename (optional) — enter the value (e.g. merged.pdf).
- Calculate — press the Calculate button to see the result instantly above.
Formula
pdf-lib: create document → copyPages from each source in order → save.
Examples
Example
Frequently Asked Questions
- How do I control the page order?
- Files merge in selection order. On most systems, multi-select preserves click order; rename files 01-, 02-… to be certain.
- What about password-protected PDFs?
- Encrypted files cannot be merged here — remove the password in your PDF reader first, then merge.
- Is there a size limit?
- Ten files, 50 MB each. Very large merges may strain mobile browsers; merge in two passes if needed.