IEEE 754 Float Converter

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.

Bitwise Operations

AND/OR/XOR/NAND/NOR/XNOR/NOT and shifts on integers of a given width (8/16/32/64 bits) in any number base.

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.

JSON ↔ YAML / CSV / XML / TOML

Convert JSON to YAML, CSV, XML, or TOML and back — entirely in the browser, no libraries.

Data URI / Base64 image

Encode an image into a Data URI (data:image/…;base64,…) for embedding in CSS/HTML, and decode a Data URI or raw Base64 back into a file — all in your browser.

JSON Repair

Fix broken JSON — trailing commas, single quotes, unquoted keys, comments, Python literals (True/False/None), and more — with a full list of every fix applied.

JSON Path Extractor / Flatten

Flatten nested JSON into a flat "path: value" list, and rebuild it back into a nested structure (Unflatten). Path notation matches JSONPath/JSON Diff: store.book[0].price.

HMAC Generator

Compute HMAC (Hash-based Message Authentication Code) of text or a file with a secret key — eight algorithms at once: MD5, SHA-1, SHA-256, SHA-384, SHA-512, SHA3-256, SHA3-512, RIPEMD-160.

Color Converter

Convert colors between HEX, RGB, HSL, HSV/HSB, and CMYK — enter a value into any field and the rest update instantly.