Free Online Generators
Development and testing constantly need throwaway values: a UUID for a new record, a strong password, a fake name and email for a seed script, a random MAC or IP address for a network fixture, a mock HTTP 200 response for a stub. These generators produce them in one click, using cryptographically secure randomness where it matters (UUIDs, passwords) and realistic formats everywhere else.
There are also quick randomizers — coin flips, dice rolls, 4- and 6-digit PINs, hex and RGB colors, dates, and ISBN-13s. Every generator runs client-side in your browser: free, instant, unlimited, and no sign-up required.
All Generators Tools (23)
UUID/GUID v4 Generator
Generate random UUID v4 strings instantly — cryptographically secure unique identifiers for databases, APIs, and testing. Free and client-side.
Launch ToolRandom Number Generator
Generate a random integer in any range you choose — 1 to 100, 1 to 10, or any custom min/max. Free, instant, client-side random number generator, no sign-up.
Launch ToolMAC Address Generator
Generate a random, locally-administered MAC address in standard colon-separated format instantly — safe for network testing and mock data, guaranteed to never collide with a real vendor OUI. Free and client-side.
Launch ToolIPv4 Address Generator
Generate a random IPv4 address instantly — realistic dotted-quad test data for network tools and fixtures. Free, client-side IP address generator.
Launch ToolIPv6 Address Generator
Generate a random IPv6 address instantly — full eight-group hexadecimal test data for modern network testing. Free, client-side IPv6 generator.
Launch ToolFake Name Generator
Generate random realistic fake names instantly — first and last name combinations for test data and demos. Free, client-side fake name generator.
Launch ToolFake Email Generator
Generate a random dummy email address on the example.com test domain instantly — safe placeholder data for forms. Free, client-side email generator.
Launch ToolRandom Phone Number Generator
Generate 1 to 25 random fake US phone numbers at once — realistic 10-digit test data for forms, databases, and bulk fixtures. Free, client-side phone number generator.
Launch ToolRandom Hex Color Generator
Pick a random color instantly — generates a #HEX code ready to paste into CSS. Free, client-side random color generator and picker, no sign-up.
Launch ToolRandom RGB Color Generator
Generate a random rgb() color value instantly — CSS-ready random colors for design experiments and testing. Free, client-side RGB color generator.
Launch ToolRandom Date Generator
Generate a random date from the last two years instantly — ISO-formatted test data for fixtures and demos. Free, client-side random date generator.
Launch ToolCoin Flip Simulator
Flip a virtual coin online — get heads or tails instantly with fair 50/50 randomness for quick decisions. Free, client-side coin flip simulator.
Launch ToolDice Roll (1-6)
Roll a virtual 6-sided die online — get a fair random result from 1 to 6 instantly for games and decisions. Free, client-side dice roll simulator.
Launch Tool2 Dice Roll (2d6)
Roll two virtual 6-sided dice at once — instant 2d6 results for board games and tabletop RPGs. Free, client-side double dice roll simulator.
Launch Tool4-Digit PIN Generator
Generate a random 4-digit PIN code instantly — adjust the length from 3 to 8 digits. Free, client-side, cryptographically random PIN generator.
Launch Tool6-Digit PIN Generator
Generate a random 6-digit PIN code instantly — OTP-style, with an adjustable 3-8 digit length. Free, client-side, cryptographically random generator.
Launch ToolRandom String Generator
Generate a cryptographically secure random alphanumeric string — 16, 32, 64, or 100 characters, adjustable in one click. Free, client-side random string generator.
Launch ToolRandom Base64 String
Generate a cryptographically random 32-byte Base64-encoded string instantly — mock tokens and keys for development and testing. Free, client-side Base64 generator.
Launch ToolRandom Hex String Generator
Generate a cryptographically secure random hex string — 16 to 64 bytes, the same output as openssl rand -hex, right in your browser. Free and client-side.
Launch ToolUUID v1 Generator
Generate a mock time-based UUID v1 string instantly — timestamp-style identifiers for testing and demos. Free, client-side UUID v1 generator.
Launch ToolHTTP 200 OK Mock
Generate a mock HTTP 200 OK JSON response instantly — realistic success payloads for stubs and API tests. Free, client-side mock API generator.
Launch ToolFake User Agent Generator
Generate a random modern browser user agent string instantly — Chrome, Safari, and Firefox formats for testing. Free, client-side UA generator.
Launch ToolRandom ISBN-13 Generator
Generate a mock ISBN-13 book number instantly — realistic 978-prefixed identifiers for catalog testing. Free, client-side mock ISBN generator.
Launch ToolFrequently Asked Questions
- Are the generated UUIDs and passwords actually cryptographically secure?
- Yes for both — UUIDs use crypto.randomUUID() and passwords use crypto.getRandomValues() with rejection sampling, the same secure randomness source browsers use for cryptographic keys. The Random Number and Randomize Case generators use Math.random() instead, which is fine for non-security randomness but not for tokens or secrets.
- Can I generate a random number in a custom range instead of 0 to a billion?
- Yes — set any min and max (the default is 1-100), and the generator produces a value inclusive of both endpoints; enter them in either order and it sorts them out automatically.