Free Online Developer Tools & Utilities

Converters

Timestamp Converter

Convert Unix timestamps to human-readable dates and vice versa. Supports seconds and milliseconds.

Generators

UUID Generator

Generate UUID v1, v4, v7, and Nil identifiers. Bulk generation with multiple output formats.

Security

Hash Generator

Generate MD5, SHA, SHA3, RipeMD, NTLM, CRC, Adler32, and Whirlpool hashes from any text.

Security Generators

Password Generator

Generate strong passwords and passphrases. Check entropy and test password strength — all in your browser.

Security JSON

JWT Decoder

Decode JSON Web Tokens and inspect header and payload. Runs locally — your token stays private.

JSON Formatters

JSON Formatter

Format, validate, and minify JSON. Syntax highlighting and error detection included.

Opens app ↗

Compare JSON +2

JSON Compare & Diff

Compare two JSON documents side by side with visual diff, tree view, format, minify & validate.

JsonDiff Studio

JSON Formatters

JSON Graph Viewer

Visualize JSON as an interactive graph or collapsible tree. Explore nested objects and arrays in your browser.

JSON Converters

JSON Converter

Convert JSON to TypeScript, YAML, XML, CSV, SQL schema, and code models for Kotlin, Java, Swift, C#, Dart, and Python.

Opens app ↗

Utilities

URL Shortener

Shorten long URLs into compact links for WhatsApp, Instagram, or email. Track clicks from your dashboard.

LynkIN

API JSON +2

Sample JSON Directory

Browse categorized real-world JSON samples for APIs, e-commerce, auth, and more. Copy, download, or send to the JSON converter.

Utilities

URL Toolkit

Encode/decode URLs, build UTM links, parse URLs, check redirects, and verify canonical tags.

Converters

Unit Converter

Convert currency, length, weight, temperature, data size, speed, and time zones.

Testing

Regex Tester

Test regular expressions against sample text with live match highlighting.

Formatters

XML Formatter

Beautify, validate, and minify XML documents with proper indentation.

JSON Converters

YAML Converter

Convert between YAML and JSON formats bidirectionally.

Formatters

HTML Beautifier

Format and beautify messy HTML markup with clean indentation.

Formatters

CSS Minifier

Minify CSS stylesheets by removing whitespace and comments.

Design Converters

Color Tools

Convert HEX, RGB, and HSL. Pick colors, build gradients, create palettes, and check WCAG contrast.

Utilities

Cron Expression Builder

Build cron expressions with human-readable descriptions, next run times, and a visual weekly scheduler.

API

GraphQL Playground

Query and mutation builder with schema explorer. Export requests to cURL or Postman Collection.

Formatters

SQL Formatter

Format and beautify SQL queries, explain statements, generate sample INSERT data, and minify SQL.

Formatters

JavaScript Beautifier

Format and beautify JavaScript code with proper indentation.

Compare API +1

GraphQL Schema Compare

Compare two GraphQL schemas side by side — SDL or introspection JSON. Spot added, removed, and changed types, fields, and enums. Runs in your browser.

Text Formatters +1

Text Toolkit

50+ free text tools online — case converters, duplicate removers, align, wrap, Unicode fancy text, Zalgo, and link extraction.

Opens app ↗

Text Formatters

TextStudio

Free online text tools — word counter, case converter, remove duplicates, find & replace, slug generator, and Lorem Ipsum. Built for writers, students, and developers.

TextStudio