Random number generator

  1. Options
  2. Result

Mode

Output format

Uses your browser’s cryptographic random source. Up to 10,000 values between −1 billion and +1 billion, with up to six decimal places. Not an atmospheric random service or a certified lottery.

Generate random numbers online

Create a single random number or generate a whole batch of integers or decimal values from a chosen range.

Use unique values, sorting, CSV-style output, JSON output and summary statistics for tests, drawings, samples and quick calculations.

Quick start

Generate up to 10,000 integers or decimal numbers, with or without repeats.

  1. Set the range and count
  2. Choose repeats, precision and output format
  3. Generate, copy or export the full list
✓ The tool runs directly in the browser and is ready for quick checks without installing software.
✓ Input can be cleared and recalculated immediately, which is useful for repeated small tasks.
✓ Use fullscreen mode when you need more space for long text, structured data or large result blocks.
✓ Copy buttons are available on generated output so results can be reused in code, documents or support chats.
✓ Most operations are deterministic: the same input and options produce the same output.
✓ For sensitive content, prefer local browser tools and review the result before sharing it further.

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User reviews

Reviews are checked before publication. We publish genuine positive feedback and specific criticism. Spam and insults without useful detail are not published; profanity and personal details are masked. Positive votes are counted immediately; negative votes are counted after review.

Reviews reflect users’ experiences, not a guarantee of results or a description of the service limits. Use the rating buttons above to leave a review.

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