How to use Merge PDF
- Add two or more PDF files in the order you want them combined.
- Drag to reorder if needed, then click Merge.
- Download your single combined PDF.
About merging PDF files
Merging PDFs combines several separate documents into one ordered file — perfect for bundling invoices, joining scanned pages, or assembling a report from multiple sources. This tool uses the pdf-lib engine to stitch your files together directly in the browser, so even confidential contracts never get uploaded.
Need the opposite? Use Split PDF to break a document apart, or Compress PDF to shrink the merged result.
Tips
- Files merge in the order you add them, so arrange them before converting.
- There is no page limit beyond your device's memory.
- The original files are never modified — you always get a new combined PDF.
Merge PDF — frequently asked questions
- Is there a limit on how many PDFs I can merge?
- No. You can merge as many PDF files as your device's memory allows. Everything is processed locally, so there are no server limits.
- Will merging reduce the quality of my PDFs?
- No. Merging copies the pages exactly as they are, so text stays sharp and images keep their original resolution.
- Is Merge PDF free to use?
- Yes. Merge PDF is completely free with no sign-up, no watermarks and no usage limits.
- Is my data uploaded to a server?
- No. Merge PDF runs entirely in your browser, so your data never leaves your device.
- Is there a size limit?
- Only your device's available memory — there are no server-side limits because nothing is uploaded.