🛠️ Developer Utilities
Free Online Developer Utilities Tools
Generate UUIDs/GUIDs, build cron expressions, calculate Unix timestamps, create URL slugs, check string lengths, and generate random IPs.
UUID Generator
Generate UUID v1, v4, and v7 identifiers
GUID Generator
Generate globally unique identifiers
Slug Generator
Generate URL-friendly slugs from text
Cron Expression Generator
Build and explain cron schedule expressions
Unix Timestamp Converter
Convert between Unix timestamps and dates
Diff Checker
Compare two texts and highlight differences
String Length Counter
Count characters, words, lines, and bytes
Random IP Generator
Generate random IPv4 and IPv6 addresses
Frequently Asked Questions
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit identifier formatted as 8-4-4-4-12 hex characters (e.g., 550e8400-e29b-41d4-a716-446655440000). UUID v4 is randomly generated; v7 is time-ordered for database performance.
What is a cron expression?
A cron expression is a string with 5–6 fields defining a schedule: minute, hour, day-of-month, month, day-of-week. For example, 0 9 * * 1 runs at 9 AM every Monday. Use our Cron Generator to build and validate expressions visually.
What is a Unix timestamp?
A Unix timestamp is the number of seconds elapsed since January 1, 1970, 00:00:00 UTC (the Unix epoch). It's timezone-independent and used in programming for consistent date/time storage. 1700000000 is November 14, 2023, 22:13:20 UTC.
What is a URL slug?
A URL slug is the human-readable part of a URL that identifies a page. It's typically lowercase, hyphenated, and stripped of special characters. For example, 'My Article Title!' becomes 'my-article-title'. Good slugs improve SEO and readability.