Bitwise Operations

Unix Timestamp ↔ Date

Convert Unix time to a date and back, with support for arbitrary (IANA) time zones.

Cron Parser

Parse a cron expression (5 or 6 fields, including @-shortcuts) — a plain-language schedule description and next run times in a chosen time zone.

Number Base Converter

Convert between binary, octal, decimal, hexadecimal, and any arbitrary (2-36) base — enter a number into any field.

Date Diff Calculator

Exact difference between two dates/times — calendar breakdown (years, months, days…), total duration, and business day count.

Age Calculator

Exact age from a birth date — years/months/days, total time lived, and the next birthday.

Timezone Converter

One moment in time, across several time zones at once. Compare working hours, plan calls, see the day difference.

JWT Encoder/Decoder

Encode and decode JWT tokens — header, payload, HMAC signing, and standard claims.

HTML Entities Encode/Decode

Encode and decode HTML entities — safely display special characters on a page.

Word/Character Frequency Counter

Frequency analysis of text: how many times each word or character appears, sorted by count.

CSS Minify / Beautify

Compress CSS for production, or format minified CSS into a readable layout.

JSON Schema Validator

Validate JSON data against a JSON Schema (draft-07 style) — with an exact path and explanation for every violation.

Whitespace & Trim Tools

Clean up excess whitespace: trim line edges, collapse repeated spaces, remove empty lines, convert tabs ↔ spaces.