Your local developer toolkit
Small tools.
Zero round trips.
Format, compare, convert, and inspect everyday developer data without sending a single byte away from your browser.
Private by designYour data never leaves this tab.
Instant resultsNo uploads, queues, or waiting.
Built for developersFocused tools with sensible defaults.
All utilities
Pick a tool and get moving
Data
JSON Formatter
Format, validate, and recursively sort JSON data.
Compare
Text & JSON Diff
Compare text or normalized JSON with precise change highlighting.
Text
Regex Tester
Test JavaScript patterns and understand each expression token.
Schedule
Cron Explorer
Validate cron expressions and preview upcoming run times.
Encoding
JSON Encoder / Decoder
Convert JSON strings and form URL-encoded data in either direction.
Numbers
Number Base Converter
Convert binary, octal, decimal, and hexadecimal values.
Time
Time Unit Converter
Translate durations from nanoseconds through weeks.
Time
Unix Time Converter
Convert Unix timestamps to readable dates and back again.
Text
String Case Converter
Transform text into nine common code and prose casing styles.