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Dummy File Generator

Browser-native QA tooling

Generate a test file with precision.

Build exact-size PDF, image, media, JSON, CSV, and source-code fixtures locally. Choose a format, set a byte target, then download without sending anything to a server.

Shareable presets: ?preset=pdf-upload-5mb · ?ext=csv&bytes=520000

Local generation workspace

Create a test file

No upload. No account.

02 / Configure

Set an exact byte target and optional text content.

One-click presets

Common QA sizes (limits are illustrative — always verify against your vendor docs).

Hard cap ~512 MiB per generation (browser memory).

Choose a file type to get started.

The exact-size file generator for QA

While standard files cover the basics, rigorous software testing often requires precision. This tool allows you to generate files with exact byte specifications and custom content signatures. This is crucial for "Boundary Value Analysis" — testing the exact limits of your application's logic.

How to use the workspace

  1. Select a format: Search or filter the catalog, then choose the fixture type your application accepts.
  2. Set Parameters: Define the desired file size (in bytes, KB, or MB) and extension.

    Tip: Enter "1048576" bytes to generate an exact 1MB binary file.

  3. Configure content: Text formats accept an optional body; binary formats use the available minimal template.
  4. Generate & Download: The file is created locally in your browser memory and downloaded instantly.

Why client-side generation matters

Unlike other tools that generate files on a server and send them to you, our generator runs entirely in your browser. This offers three major benefits:

  • 100% Privacy: Your data (or the data structure you are testing) never leaves your device.
  • Zero Latency: No waiting for network uploads or downloads. A 100MB file generates as fast as your CPU can process it.
  • Unlimited Bandwidth: Since you aren't downloading from a server, you can generate gigabytes of test data without hitting daily limits or slow speeds.
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