Developer Utilities

Test regular expressions live with match highlighting, capture groups and replace preview.

Build regular expressions from a library of tested patterns (email, URL, IP, dates, IBAN, Saudi/Jordan phone numbers…) and custom rules.

Get a plain-English, token-by-token explanation of any regular expression.

Generate placeholder text as paragraphs, sentences or words — Latin, Arabic or Hindi.

Generate random strings with custom length, character sets and quantity using secure randomness.

Convert timestamps (seconds, milliseconds, microseconds) to human dates and back, in any timezone.

Convert Unix epoch seconds to a readable date and get the current Unix time.

Calculate the exact difference between two dates in years, months, days, hours and total units.

Add or subtract days, weeks, months, years, hours and minutes from a date.

Convert a date and time between timezones (Riyadh, Amman, Delhi, UTC, New York, London…).

Parse and generate ISO 8601 date-time strings, durations and intervals.

Build cron expressions visually and preview the next run times.

Translate any cron expression into plain English and list upcoming run times.

Validate cron expressions field by field with precise error messages.

Generate a throwaway email address and read what arrives, on the same page. The address is released when you stop using it.

Generate UUID v4 (random) and v7 (time-ordered) identifiers in bulk, and validate existing ones.

Generate ULIDs (sortable, 26-character identifiers) and decode their timestamps.

Convert numbers between any bases from 2 to 36 (binary, octal, decimal, hex, base32…).

Instantly convert between decimal, binary, octal and hexadecimal with bit-level view.

Convert colors between HEX, RGB(A), HSL(A), HSB/HSV, CMYK and CSS named colors with a live preview.

Quickly convert between HEX, RGB and HSL color values.

Generate random integers or decimals in a range, with or without duplicates, using secure randomness.

Calculate percentages, percentage change, increase/decrease and what percent X is of Y.

Convert between bytes, KB, MB, GB, TB (decimal SI) and KiB, MiB, GiB (binary IEC), plus bits.