100% Free · No Sign-up · No Data Stored

Free Developer Toolbox for Everyday Coding

Free online developer tools for JSON, SQL, JWT, hashing, regex, and more. Format, convert, generate, and test — instantly in your browser. Privacy first — your input is processed in real time and never stored on our servers.

  • No hidden charges or premium tiers
  • Inputs processed in real time — never saved
  • Works on desktop, tablet, and mobile

All Tools 20

Every tool is free to use — no account, no limits, no paywalls

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

Password Generator

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

Security

JWT Decoder

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

JSON

JSON Formatter

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

Opens app ↗
JSON

JSON Compare & Diff

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

JsonDiff Studio
Opens app ↗
Utilities

URL Shortener

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

LynkIN
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.

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

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.

Built for developers who value privacy

100% free forever — no trials, no premium tiers, and no hidden charges. Privacy first — your input is processed in real time and never stored on our servers.

Always Free

Every tool is completely free with no hidden fees, trials, upsells, or premium tiers — now and always.

No Data Stored

Your input is processed in real time and discarded immediately. We never store, log, or sell your data.

Instant Results

Fast client-side and server-side processing with live validation and real-time feedback.

Works Everywhere

Fully responsive design — use devStudio on desktop, tablet, or mobile without installing anything.