Why merge PDF files?
Plenty of applications ask for a single file: a form with your ID, a payslip and a certificate; a report with its appendices; or a pack built from chapters exported separately. Merging PDFs lets you send one tidy document instead of a pile of loose attachments.
Add the files by dragging them onto the page, put them in the right order with the arrows and click “Merge PDF”. Pages are copied exactly as they are: text stays selectable and searchable, internal links keep working and images don’t lose quality, because nothing is recompressed.
The tool runs inside your browser using the pdf-lib library. Your documents are never uploaded to a server, which matters most when you’re merging contracts, invoices or personal paperwork. No watermark is added either.
The free trial lets you merge two PDFs. With ToolStudio Pro you can merge as many files as you need in one go, with no limits and no ads, and use every other PDF tool in batches too.
How to merge PDF files into one
- Drag your PDF files onto the page or click to choose them.
- Put them in order with the arrows: they’re merged from top to bottom.
- Click “Merge PDF”.
- Download the combined document.
When to merge PDFs
- Gather the paperwork a government office or job application asks for into one file.
- Combine the month’s invoices or receipts to send to your accountant.
- Add appendices, a cover page or a table of contents to a paper or report.
- Bring several scans of the same contract together in a single document.
- Build a portfolio or information pack from PDFs exported separately.
Frequently Asked Questions
How many PDFs can I merge?
Two with the free trial. With ToolStudio Pro, up to 50 files at once and unlimited use.
Does merging PDFs reduce quality?
No. Pages are copied without being recompressed, so text, images and vector graphics stay exactly as they were in the originals.
Can I change the order of the files?
Yes. Use the arrows on each file before merging; the final document follows the order of the list.
Are my files uploaded to a server?
No. The file is opened and processed right in your browser. It’s never uploaded to a server and never leaves your device, so you can safely use it with contracts, invoices or personal documents.
Can I merge password-protected PDFs?
PDFs with an open password can’t be opened without it. First remove the password in the program you created the file with (or in your PDF reader, using the password), then try again.
Is it free?
You get one free try per tool: one PDF (two for merging, one image for creating a PDF). You can reprocess that same file with different settings as many times as you like, but to process a new file you need ToolStudio Pro, which gives you unlimited use of every tool, batch processing (several files at once, downloaded together in a ZIP) and no ads. You can cancel anytime.
