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How to Use Merge PDF Online

Learn how to use Merge PDF safely and efficiently.

Published January 6, 20253 min readBy Get Tools Lab Editorial & Engineering Team

Direct answer

Open Merge PDF and select two or more PDF files. The interface explicitly asks you to select files in the order they should appear. Select “Merge and download”. The tool creates a new PDF and downloads it as merged.pdf.

Key takeaways

  • A five-page proposal plus a two-page specification and a three-page appendix should produce ten pages.
  • Check that the page sequence follows file selection order; the interface does not provide a separate drag-to-reorder step.
  • PDF digital signatures may not remain valid after the document is reconstructed. Preserve signed originals and verify any signature independently.

Common mistakes

  • The implementation uses pdf-lib in the browser to load files and copy their pages.
  • Password-protected or malformed PDFs may fail to load.
  • The tool does not perform OCR or repair inaccessible scanned text.

Learn how to use Merge PDF safely and efficiently.

Getting started

Get Tools Lab provides a browser-based workflow for merge pdf. Start with a clean copy of your source content, review the available options, and keep the original data until you verify the result.

Step-by-step workflow

  1. Open the Merge PDF tool.
  2. Enter or upload the required content.
  3. Choose the relevant options and run the tool.
  4. Review, copy, or download the result.

Quality and privacy checks

Check the output before using it in production. Avoid entering sensitive information unless you understand how the tool processes data. For file tools, keep an untouched backup.

Explore other PDF tools and guides to complete the rest of your workflow.

Sources and references

  1. https://pdf-lib.js.org/

Ready to try it?

Use the related Get Tools Lab tool directly in your browser.

Merge PDF