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How do I merge PDF documents?

Use the Lumin merge tool to combine multiple PDF documents into one with ease.


  1. Select the Page Tools from the main menu bar.Merge
  2. Click the Merge tool.Merge 1
  3. Click Upload files and choose where you'd like to upload from.Merge 2
  4. Select the file(s) you want to merge into the document - you can select to upload multiple files at a time. 
  5. Select Insert all pages to merge the entire document.
    1. Enter a comma-separated list of pages to insert if you only want to merge some pages of the uploaded document.
    2. Under the Location field, select where you would like to insert the uploaded document(s).
  6. Click Merge, then confirm by clicking Merge again.Merge 4

Tip: If your now-merged document requires further modification, check out the rest of Lumin PDF page tools:

Merge files using the AI chatbot

  1. Open the file, and in the Editor, select the AI Assistant located in the top right corner.
  2. Click Add file to upload the document you wish to merge. You can upload files saved in your device or Google Drive. 
  3. Finally, use the prompt 'Merge this document before or after page x'.

WARNING: The AI assistant's output may not always be precise; therefore, we recommend that you carefully review the results each time. As this feature is in BETA, occasional bugs or performance issues may arise. We appreciate your understanding as we enhance the AI assistant's functionality and reliability. Your feedback is crucial for refining this feature, so please share any thoughts or report issues you encounter.