Free Online Developer Tools

Character Counter

Count characters, words, sentences

🔗

Slug Generator

Create SEO-friendly URL slugs

{ }

JSON Formatter

Format & validate JSON

🔷

JSON to TypeScript

Generate TS interfaces from JSON

📄

JSON to YAML

Convert JSON to YAML format

📋

YAML to JSON

Convert YAML to JSON format

🗃️

SQL Formatter

Format & beautify SQL queries

⏰

Timestamp Converter

Unix timestamp to date

🌍

Time Zone Converter

Convert times across time zones

🔍

Regex Tester

Test regular expressions

✨

Regex Helper

Pattern library & generator

Curl to Code

Convert curl to JS, Python, PHP, Go

🐧

Chmod Calculator

Unix file permissions calculator

Tailwind Generator

Visual Tailwind CSS builder

✅

JSON Validator

Validate & format JSON

📏

CSS Units Converter

Convert px, rem, em, vh, vw

HTTP Status Codes

Complete HTTP status reference

🔍

JSON Path Finder

Query JSON with JSONPath

🔑

Password Generator

Generate secure passwords

Color Converter

HEX, RGB, HSL converter

🎭

Box Shadow Generator

Visual CSS shadow builder

IP Lookup

Geolocate any IP address

🔍

DNS Lookup

Query DNS records

IP Subnet Calculator

Calculate network ranges & CIDR

⏰

Crontab Generator

Visual cron expression builder

🔗

UTM Builder

Create campaign tracking URLs

Color Palette Generator

Generate color harmonies

JSON Diff

Compare two JSON objects

🗺️

Sitemap Extractor

Extract URLs from sitemaps

🏷️

Meta Tags Generator

Generate SEO meta tags

🐦

Twitter Card Preview

Preview & generate Twitter cards

🔖

Schema.org Generator

Generate JSON-LD structured data

📧

Email Validator

Validate email addresses

📷

Lorem Picsum

Random photo placeholders

⚖️

Color Contrast Checker

Check WCAG accessibility compliance

✉️

Email Signature Generator

Create professional HTML email signatures

🪟

Glassmorphism Generator

Create frosted glass CSS effects

🎬

CSS Animation Generator

Create keyframe animations visually

Word Frequency Analyzer

Analyze keyword density & word patterns

👁️

Color Blindness Simulator

Test accessibility for color vision deficiency

🍅

Pomodoro Timer

Stay focused with 25min work intervals

⚛️

HTML to JSX Converter

Convert HTML to React JSX syntax

CSS Filter Generator

Create visual effects with CSS filters

🎲

Random Data Generator

Generate fake data for testing & demos

⚖️

CSS Specificity Calculator

Calculate & compare CSS selector specificity

📅

Calendar Week Calculator

Find ISO week numbers & day of year

CSV Viewer & Editor

View, search, sort, and edit CSV data

CSS to Tailwind Converter

Convert CSS properties to Tailwind classes

📖

README Generator

Generate professional GitHub README files

🔤

JSON Key Sorter

Sort JSON keys alphabetically (A-Z or Z-A)

⚙️

Nginx Config Generator

Generate nginx configs for reverse proxy, static sites, SSL

🐳

Dockerfile Generator

Generate production-ready Dockerfiles for any language

🐳

Docker Compose Generator

Generate docker-compose.yml for common stacks

💅

Prettier Config

Generate .prettierrc config files visually

📦

Package.json Generator

Create package.json for Node.js, React, Express projects

✅

JSON Schema Validator

Validate JSON data against JSON Schema (draft-07)

📅

Date Diff Calculator

Calculate exact time difference between two dates

📋

HTTP Headers Reference

Complete HTTP headers reference with examples

🍪

Cookie Parser

Parse HTTP cookies, extract values and attributes

🔢

Semver Comparator

Compare, sort & validate semantic versions

⏱️

API Rate Limit Calculator

Calculate rate limits, intervals & API costs

🔐

TOTP Generator

Generate 2FA codes (Google Authenticator compatible)

🎭

API Response Mocker

Generate mock JSON API responses for testing

IP Address Generator

Generate random IPv4/IPv6 addresses for testing

CSV to SQL

Convert CSV data to SQL INSERT statements

🛡️

JSON to Zod

Generate Zod validation schemas from JSON

🔐

SSH Config Generator

Generate ~/.ssh/config entries for easy server access

📦

HTML Minifier

Compress HTML by removing whitespace & comments

📄

YAML Beautifier

Format YAML with consistent indentation

HTTP Request Builder

Build HTTP requests & generate cURL/Fetch/Axios code

🐹

JSON to Go Struct

Convert JSON to Go struct definitions with tags

◮

JSON to Prisma

Generate Prisma schema models from JSON data

📝

Git Commit Generator

Build conventional commit messages with emoji

🔧

Env File Validator

Parse and validate .env files with issue detection

🔌

DB Connection String

Build connection strings for PostgreSQL, MySQL, MongoDB, Redis

📎

Data URL Generator

Convert text or files to data: URLs for embedding

🧠

Regex Explainer

Explain regex patterns in plain English

📘

OpenAPI Viewer

Parse and visualize OpenAPI/Swagger specs beautifully

🐚

Bash Script Formatter

Format and lint bash/shell scripts with style checks

🎣

Webhook Tester

Generate temporary webhook URLs for testing integrations

📏

ESLint Config Generator

Generate .eslintrc configs for React, TypeScript, Vue

🔷

TSConfig Generator

Generate tsconfig.json for Node.js, React, Next.js

⚡

Vite Config Generator

Generate vite.config.ts with plugins and presets

📄

XML Formatter

Format, beautify, and validate XML documents

📎

MIME Type Lookup

Look up MIME types by file extension

⬡

GraphQL Formatter

Format and beautify GraphQL queries & mutations

⚛️

SVG to JSX

Convert SVG code to React JSX components

⚡

Emmet Expander

Expand Emmet abbreviations to HTML code

🌈

Gradient Text Generator

Create stunning CSS gradient text effects

▲

Vercel Config Generator

Generate vercel.json configuration files

GitHub Actions Generator

Generate CI/CD workflow YAML for GitHub

🔤

Font Stack Generator

Generate professional CSS font-family stacks

📱

Tailwind Breakpoints Visualizer

Visualize & customize Tailwind responsive breakpoints

CSS Gradient Border

Create beautiful gradient border effects with CSS

SQL to MongoDB

Convert SQL queries to MongoDB query syntax