CodingTool.dev

Free, fast, and practical developer tools that run instantly in your browser. No setup or sign-up required.

JSON & Data Tools

JSON Formatter

Format and beautify JSON data

YAML ⇄ JSON Converter

Convert between YAML and JSON

CSV ⇄ JSON Converter

Convert between CSV and JSON

XML ⇄ JSON Converter

Convert between XML and JSON formats

JSON Schema Validator

Validate JSON against schemas

JSON to TypeScript Converter

Generate TypeScript types from JSON

CSV Editor

Edit CSV files like a spreadsheet

YAML Viewer

View, parse, and validate YAML with tree view

Text & Encoding

Base64 Encoder/Decoder

Encode and decode Base64 strings online

URL Encoder/Decoder

Encode and decode URLs safely

HTML Escape / Unescape

Encode and decode HTML entities online

String Case Converter

Convert text case formats

UUID/GUID Generator

Generate unique identifiers instantly

Time & Date

Unix Timestamp Converter

Convert timestamps to dates

Timezone Converter

Convert between timezones

ISO8601 Formatter

Format and parse ISO8601 dates

Age Calculator

Calculate age from birth date

Code Utilities

JavaScript Beautifier & Minifier

Format or minify JavaScript

CSS Beautifier & Minifier

Format, optimize, and minify CSS code

HTML Beautifier & Minifier

Format, optimize, and minify HTML code

Code Diff Checker

Compare code/text side-by-side

Markdown Editor & Previewer

Live markdown editor with preview

Security Tools

MD5 Generator

Generate MD5 hash from text or files

SHA256 Hash Generator

Generate SHA256 hashes

SHA512 Hash Generator

Generate SHA512 hashes

JWT Decoder

Decode JWT tokens

Password Generator

Generate secure passwords

JWT Generator

Generate JWT tokens with HS256

Developer Extras

Regex Tester

Test regular expressions interactively

HTTP Header Parser

Parse HTTP headers

Fake Data Generator

Generate mock data

Commit Message Generator

Generate conventional commits

Currency Formatter

Format currency values

Array Sorter & Shuffler

Sort and shuffle arrays and objects

Math & Calculation

Unit Converter

Developer-focused unit converter for data sizes, rates, time, and more

Decimal Precision Calculator

Precise decimal calculations