File Runs in your browser
Large File Generator
Create exact-size dummy test files filled with zeros, random data, 0xFF, sequential bytes, or repeating text. Batch generation, size presets (1KB-1GB), filename templates with numbering, progress bar, hex preview. 100% client-side.
100% Private Works Offline Instant
Create exact-size dummy test files filled with zeros, random data, 0xFF, sequential bytes, or repeating text. Batch generation, size presets (1KB-1GB), filename templates with numbering, progress bar, hex preview. 100% client-side. Everything runs locally in your browser — your data never leaves your device.
How to use
- Enter your input in the tool above.
- Adjust any options to your preference.
- Use the Copy or Download buttons to save the result.
- Everything happens locally — your data never leaves your browser.