Merge PDF
Combine multiple PDFs into one document in seconds.
Merge two or more PDF files into a single document without quality loss. Add your PDFs, keep them in the right order, and download one combined file. Everything is processed locally in your browser — your documents never leave your device.
Your files are processed locally in your browser. Nothing is uploaded to a server, ever.
Tip
Drop your file here or click to browse. Everything is processed on this device — nothing is uploaded.
Quick answers
- What does this tool do?
- Combine multiple PDFs into one document in seconds. Merge two or more PDF files into a single document without quality loss. Add your PDFs, keep them in the right order, and download one combined file.
- Is it free?
- Yes — free and unlimited, with no account required and no watermark on the result.
- What files are supported?
- PDF files, up to 100 MB each, up to 10 at once.
- Where is my file processed?
- Entirely in your browser. Your file never leaves your device — nothing is uploaded to a server.
- What are the limitations?
- Merging keeps every page as-is, including differing page sizes and orientations. Very large files (hundreds of pages) may be slow in the browser.
- What happens if processing fails?
- You get a clear message explaining what went wrong and how to fix it (try another file, check the format, or start over). Your original file is never touched.
How to Merge PDF
- Click "Add your files" and choose the PDFs you want to combine (up to 10).
- Reorder the files if needed — they will be merged in the displayed order.
- Click "Process" and wait a moment while the files are merged.
- Download your single merged PDF.
Frequently asked questions
Common problems and fixes
- The download button does not do anything
Why: some browsers block programmatic downloads after inactivity, or the disk is full.
Fix: allow downloads for this site in the browser settings, then process again — the job itself is instant for small files.
- Pages end up in the wrong order
Why: the selection order differed from the thumbnail order shown on screen.
Fix: re-check the page order in the preview list before running the job; the tool applies exactly what is shown.
- The output file will not open in my viewer
Why: the download was interrupted, or the viewer is very old.
Fix: download again and check the file size matches; if it persists, try a different PDF viewer.
Who uses Merge PDF?
- Admin and HR staff — combining scans, forms and letters into one packet — up to 10 files of 100 MB each per job.
- Anyone sharing part of a document — extracting just the pages someone asked for instead of sending the whole file.
- People fixing scans — rotating upside-down or sideways pages before the file goes out to a client.