Dev Tools
7 tools in totalProgramming tools and code generators for developers. Learn how to generate random numbers, strings, and data in various programming languages
All Dev Tools Tools
Python Random Number Generator
FeaturedLearn how to generate random numbers in Python using random, secrets, and numpy modules. Interactive code examples with live execution and output demonstration
Java Random Number Generator
FeaturedLearn how to generate random numbers in Java using java.util.Random, SecureRandom, ThreadLocalRandom, and Math.random(). Interactive code examples with detailed explanations
C++ Random Number Generator
FeaturedLearn how to generate random numbers in C++ using rand(), srand(), <random> library, and std::uniform_int_distribution(). Interactive code examples with detailed explanations
Random IMEI Generator
FeaturedGenerate valid random IMEI numbers with Luhn checksum for QA testing, app development, and device data mockups.
UUID Generator
FeaturedGenerate RFC 4122 compliant UUIDs in multiple versions with cryptographically secure random generation and bulk support
ULID Generator
FeaturedGenerate ULIDs (Universally Unique Lexicographically Sortable Identifiers) with 48-bit timestamp and 80-bit randomness
Crontab Generator
FeaturedGenerate crontab expressions with an intuitive visual interface for Linux/Unix task scheduling
Developer Utilities & Code Tools
Essential developer tools for generating UUIDs, ULIDs, cron expressions, Markdown tables, and ASCII diagrams. Built by developers, for developers.
Why Choose Our Dev Tools Tools?
Standards Compliant
UUID generation follows RFC 4122, ULIDs follow the specification, and cron expressions are POSIX-compatible.
Code Examples
Interactive code examples for Python, Java, and C++ random number generation with live output.
Bulk Operations
Generate up to 100 UUIDs/ULIDs at once, build complex cron expressions visually, and create ASCII diagrams interactively.
Frequently Asked Questions
We support UUID v1 (timestamp), v4 (random), v5 (SHA-1 name-based), v7 (time-ordered), and Nil UUID — all RFC 4122 compliant.
Our programming tool pages include interactive examples for Python, Java, and C++ with live code execution and output demonstrations.
UUIDs are 128-bit identifiers. ULIDs are also 128-bit but combine a 48-bit timestamp with 80-bit randomness, making them lexicographically sortable by time.