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Developer Tools

30 free tools for developers. JSON, CSS, code formatters and utilities.

JSON Formatter

Format and validate JSON data

JSON Visualizer

Visualize JSON as interactive tree

JSON CSV Converter

Convert between JSON and CSV

CSS Grid Generator

Visual CSS grid layout builder

CSS Minifier

Minify and beautify CSS code

CSS Validator

Validate CSS syntax

HTML Beautifier

Format HTML with proper indentation

HTML Encoder Decoder

Encode/decode HTML entities

SQL Formatter

Format SQL queries beautifully

Regex Tester

Test regular expressions live

Base64 Encoder

Encode/decode Base64 strings

JWT Decoder

Decode and inspect JWT tokens

URL Encoder Decoder

Encode/decode URLs

htaccess Generator

Generate Apache htaccess rules

Nginx Config Generator

Generate Nginx server configs

Cron Expression Generator

Build cron expressions visually

Markdown Preview

Preview markdown in real-time

Diff Checker

Compare text differences

Binary Converter

Convert text to/from binary

Number Base Converter

Convert between number bases

Timestamp Converter

Convert Unix timestamps

Core Web Vitals Checker

Check Core Web Vitals scores

Lighthouse Score Estimator

Estimate Lighthouse scores

Meta Tags Debugger

Debug and preview meta tags

Structured Data Generator

Generate Schema.org JSON-LD

Responsive Breakpoint Tester

Test responsive breakpoints

Git Commit Generator

Generate conventional commits

API Rate Limit Calculator

Calculate optimal API request rates

Env Validator

Validate .env files for issues

Database Schema Visualizer

Visualize SQL database schemas

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