Transparent randomness for decisions, games, and analysis

Random Number Generator

Generate secure, unbiased random numbers with flexible ranges, unique draws, and instant export options for any scenario.

Flexible minimum and maximum ranges with batch output

Unique results with optional no-repeat protection

Secure mode powered by the browser crypto API

Copy or download results as CSV or TXT in one click

Specialized generators and deep-dive guides

Explore focused workflows for lotteries, true randomness, gaming presets, mobile-ready UIs, and more.

Integer generator

Preset range recipes and fairness checklists for whole-number draws.

Lottery quick picks

Simulate Powerball, EuroMillions, or custom raffles with exportable batches.

True randomness mode

Understand Web Crypto entropy, fallbacks, and verification workflows.

Gaming & simulations

Dice replacements, loot table automation, and fair tournament seeding.

About & principles

Mission, architecture, and roadmap behind the RNG.

Random Mobile Phone Number Generator

Generate realistic global phone numbers or bulk CSV exports for onboarding flows, QA, and privacy sign-ups.

How the generator works

  • 1

    Set your range

    Enter minimum and maximum values and decide how many results you need.

  • 2

    Choose randomness

    Switch between fast Math.random or secure crypto entropy and toggle duplicate protection.

  • 3

    Generate and export

    Generate numbers instantly, copy them, or download ready-to-use CSV/TXT files.

Popular ways to use this RNG

Game balancing & loot tables

Simulate rolls, randomize encounters, or draft tournament brackets with optional no-repeat fairness.

Classroom experiments

Generate unbiased samples for probability lessons, statistics labs, or mathematics demonstrations.

Data analysis & QA

Create reproducible test data, shuffle IDs, or choose participants while exporting logs for audits.

Case studies from real users

See how different teams rely on the generator to remove bias and document their workflows.

Esports tournament seeding

An esports league uses secure mode with duplicate protection to randomize brackets, exporting CSV logs for auditors after every draw.

University research lab

A statistics department generates reproducible random assignments, storing the history pane output alongside experiment notes for compliance.

Product feature rollouts

A SaaS growth team randomly selects feature-flag cohorts and shares the TXT export with engineering to ensure transparent allocation.

Built for transparency and trust

Addressing the most common RNG complaints: bias, opacity, and limited control.

Cryptographic entropy

Secure mode uses the browser crypto API for high-quality randomness when available.

Repeatable settings

Every batch logs its parameters so you can prove how results were produced.

Fast at scale

Generate up to 1,000 numbers per batch in under a second on modern devices.

Client-side privacy

All calculations stay in your browser—no accounts, uploads, or data retention.

Random number generator FAQ

How do I guarantee there are no repeated numbers?▼
Disable the duplicate toggle. The tool checks that your quantity fits within the range or decimal precision and automatically retries until all results are unique.
What makes the secure mode more trustworthy?▼
Secure mode uses the Web Crypto API for cryptographically strong randomness sourced from the operating system. If a browser cannot supply secure entropy, the tool falls back to the standard generator and alerts you.
Can I download the results for documentation?▼
Yes. You can copy results to the clipboard or download ready-to-share CSV and TXT files, and the history panel stores the last 20 batches for quick re-exports.
How many numbers can I generate at once?▼
You can create up to 1,000 numbers per batch. Larger draws are best handled by exporting multiple batches so performance stays fast.
Can the generator output decimals or fractions?▼
Switch the format selector to decimals and choose how many decimal places you need. The generator rounds consistently so you can reuse the numbers in spreadsheets or simulations.
What does the history panel track?▼
The history log records the last 20 batches with their range, quantity, and entropy mode. It lets you audit results or repeat a draw without reconfiguring the tool.
What happens if secure randomness is unavailable?▼
The interface detects when the Web Crypto API cannot run, switches to the standard generator, and shows a warning banner. You can retry on a supported device or browser when security is critical.
Does the tool support mobile devices?▼
Yes. The layout is optimized for phones and tablets, and buttons like copy or download adjust to touch interactions, so you can run draws on the go.
How can I prove the draw was fair?▼
Keep the exported CSV or TXT along with the configuration shown in the history panel. Sharing both files gives reviewers the numbers, entropy mode, and timestamp for compliance checks.
Can I combine this RNG with true randomness sources?▼
The main generator supports secure browser entropy today, and the true random section explains how upcoming integrations with external hardware feeds will work. You can already import those results into the tool for record keeping.