Guides · Practical guide · updated October 22, 2026
How to merge PDF files into one
Merging PDFs is handy for job applications, invoices with attachments or scans you have page by page. In Indy PDF Studio you merge documents in your browser: files are loaded from your device and are not uploaded to a server. The feature is free during the introductory period.
Try it free in the editorStep by step
- Open the editor and choose Merge documents on the start screen, or use the Merge button in the top bar.
- Select all PDFs you want to combine into one file.
- Check the page order in the thumbnails on the left and move pages up or down with the arrows.
- Straighten rotated scans in the Page panel with Left and Right.
- Review the result and export the merged document as a PDF.
Page order and orientation
After merging, pages follow the order of the selected files. Change the order in the thumbnails and the orientation in the Page panel. Go through the whole document before exporting.
Merging scans and OCR
Scanned documents can be merged too. If you need searchable or copyable text in the result, run OCR on the pages.
Large files
Processing happens in your browser, so speed depends on your device. Individual files can be up to 100 MB. Very large documents are more reliable when merged in smaller parts.
More guides
- How to translate a PDF into English
- How to extract text from a scanned PDF with OCR
- How to edit a PDF in your browser for free
- What you can do for free in Indy PDF Studio
- How to split a PDF into multiple files
- How to convert a PDF to Word
- How to sign a PDF
- How to rotate and reorder PDF pages
- How to convert a PDF to JPG or PNG
- How to flatten a PDF