- Enter the minimum and maximum values of your range.
- Set the count and, if you want, the decimal precision.
- Press Generate, then copy the result or generate a new set.
Everything runs locally in your browser using a cryptographic random source. No data is sent to any server, and you can generate as many sets as you like.
Random numbers are a quiet workhorse of daily life. They pick a winner from a list of entries, roll dice for board games, select a sample from a dataset, and fill test data when you are prototyping. The catch is that humans are terrible at producing randomness by hand — a “random” choice made in your head is skewed by habit and preference. A generator removes that bias, giving every value in the range an equal chance.
Tips
For a fair coin toss, set the range to 1–2; for dice, use 1–6. When sampling without replacement, keep the unique option on so no value appears twice. Generating numbers with two decimal places works well for currency-style test data, while plain integers are best for indexes and IDs.
Do not use this tool to create passwords or cryptographic keys; for security purposes use a dedicated password or key generator instead.
Why use it
“Pick a number” from someone’s head is never neutral, and a spreadsheet formula can be fiddly to set up each time. This generator gives you unbiased results in seconds, with control over range, count, decimals and duplicates — free, private and always in your browser.
Real-world use cases
- API development: Format JSON responses from Chrome DevTools before committing fixtures.
- Debugging: Validate timestamps, regex or hashes without switching to a terminal or IDE.
- On-call fixes: From your phone, quickly convert timezone or generate a UUID for a hotfix branch.
How it compares
| Tool | Offline | Privacy | Setup | Cost |
|---|---|---|---|---|
| This tool | Yes | 100% local | None | Free |
| Server tools | No | May log IP | None | Free/Ads |
| CLI / IDE plugin | Yes | Local | Install & config | Free |
For quick checks without context switching, the browser tool is fastest. For CI, keep the CLI as source of truth.
Pro tips
- Bookmark the tool. With prefetch enabled, it opens near-instantly next time.
- For secrets like hashes with salts, prefer your local terminal for production values.
- Pair UUID/Password generators with your password manager for rotation workflows.