Custom Dummy File Generator

Need a specific file size like 3.7MB or 18MB for boundary testing? Use our instant browser generator to create and download custom-sized test files on demand.

100% Client-Side Generation Zero Upload / Instant Precise Byte Calculation

Custom Dummy File Generator

Generate custom test files with exact byte sizes instantly inside your browser.

1. Select File Format

2. Quick Presets

3. Exact Target Size

Browser generator supports up to 100MB directly. For files up to 1GB, browse our pre-built downloads.