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Dummy File Generator: The Essential Tool for Load Testing and QA

Updated Jan 12, 20266 min read

In software quality assurance (QA) and system administration, we often need files of a specific size to test how our systems behave. Whether you're testing a file upload limit on a web server or validating a storage quota, the Dummy File Generator is your go-to utility.

Why Generate Dummy Files?

Manually creating a 100MB file or a 2GB file can be a chore. You might try to find a large video or an ISO image, but that's inefficient. A dedicated generator allows you to create files of exact sizes instantly, right in your browser.

Common Use Cases for Testing:

  • Upload Limits: Verify that your Nginx or Apache config correctly blocks files exceeding client_max_body_size.
  • Network Throughput: Test how long it takes to transfer a 500MB file across your VPN or internal network.
  • Disk Quotas: Ensure your application gracefully handles "Disk Full" scenarios by filling up a test volume.
  • UI Validation: Test progress bars and error messages for large file uploads in your React or Vue frontend.

🚀 Performance Tip

Because our tool runs in the browser, generating files larger than 1GB might take a few seconds and consume significant RAM. For extremely large files, it's often more efficient to use command-line tools like dd or fallocate on Linux.

How it Works: Privacy First

Our tool uses the Blob API and URL.createObjectURL. This means the file data is generated entirely within your browser's local sandbox. No data is ever uploaded to our servers. It's fast, secure, and preserves your bandwidth.

Using the Devtobox Generator

  1. Select Size: Enter the number and choose between KB, MB, or GB.
  2. Choose Extension: Pick a format like .txt, .pdf, .zip, or .iso (the contents will be binary data).
  3. Download: Click generate, and the browser will prompt you to save the file immediately.

Stop searching for "big files" to test your systems. Create exactly what you need with the Dummy File Generator.

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