Developer Tools
A curated set of free, browser-based utilities for software engineers. Every tool runs client-side — your data never leaves your device. Built by a fintech engineer with deep context in payment systems, encoding, and cryptography.
Encoding & Decoding
JSON Formatter & Validator
Popular
Format, validate, and minify JSON in your browser.
Base64 Encoder / Decoder
Popular
Encode and decode Base64 text and files instantly.
URL Encoder / Decoder
Encode and decode URLs and query parameters instantly.
JSON ↔ YAML Converter
Convert between JSON and YAML instantly.
Auth & Security
Cryptography
Generators
Utilities
Cron Expression Builder
Build, parse, and explain cron expressions visually.
Regex Tester
Popular
Test regular expressions with live match highlighting.
Markdown to HTML
Convert Markdown to HTML with live preview.
Unix Timestamp Converter
New
Convert Unix epoch timestamps to dates and back, in any timezone.
Case Converter
New
Convert text between camelCase, snake_case, kebab-case, and more.
Word & Character Counter
New
Count words, characters, sentences, and estimate reading time live.
Number Base Converter
New
Convert numbers between binary, octal, decimal, hex, and any base.
Text Diff Checker
New
Compare two texts and highlight the differences line by line.
Roman Numeral Converter
New
Convert numbers to Roman numerals and back.
Morse Code Translator
New
Translate text to Morse code and decode Morse back to text.