Free Online Developer Tools

JSON Formatter & Validator

Format, validate, and beautify JSON data with syntax highlighting.

Base64 Encode/Decode

Encode text to Base64 or decode Base64 back to plain text.

URL Encode/Decode

Encode or decode URL components for safe transmission.

Decoder

JWT Decoder

Decode and inspect JSON Web Token header and payload.

UUID Generator

Generate random UUID v4 identifiers instantly.

Crypto

Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text.

Regex Tester

Test regular expressions against sample text with match highlighting.

Unix Timestamp Converter

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

Color Converter

Convert colors between HEX, RGB, and HSL formats.

Lorem Ipsum Generator

Generate placeholder text in paragraphs, sentences, or words.

Password Generator

Generate secure random passwords with customizable length and characters.

Markdown Preview

Write Markdown and see a live rendered preview side by side.

HTML Entity Encode/Decode

Encode special characters to HTML entities or decode them back.

Minifier

CSS Minifier

Minify CSS code by removing whitespace and comments.

Minifier

JavaScript Minifier

Minify JavaScript code by removing whitespace and shortening syntax.

SQL Formatter

Format and beautify SQL queries for better readability.

Cron Expression Generator

Build cron expressions visually with a human-readable preview.

.gitignore Generator

Generate .gitignore files for popular languages and frameworks.

Diff Checker

Compare two texts and see the differences highlighted line by line.

JSON to CSV Converter

Convert JSON arrays to CSV format for spreadsheet use.

QR Code Generator

Generate QR codes from any text or URL instantly.

Slug Generator

Convert text to URL-friendly slugs for SEO-friendly URLs.

Word Counter

Count words, characters, sentences, paragraphs, and estimate reading time.

Text Case Converter

Convert text between camelCase, snake_case, kebab-case, PascalCase, and more.

JSON to TypeScript

Generate TypeScript interfaces from JSON data automatically.

Image to Base64

Convert images to Base64 data URI strings for embedding in code.

Tailwind CSS Colors

Browse and copy all Tailwind CSS color palette values.

Calculator

Chmod Calculator

Calculate Unix file permissions in octal and symbolic notation.

YAML ↔ JSON Converter

Convert between YAML and JSON formats instantly.

CSV to JSON

Convert CSV data to JSON array format.

Number Base Converter

Convert numbers between binary, octal, decimal, and hexadecimal.

HTTP Status Codes

Searchable reference for all HTTP status codes with descriptions.

Regex Escape

Escape special regex characters in a string for literal matching.

HTML to Markdown

Convert HTML markup to clean Markdown syntax.

Markdown to HTML

Convert Markdown text to HTML output.

JS Object to JSON

Convert JavaScript object literals to valid JSON.

JSON Path Finder

Explore JSON structure and find paths to every value.

Word-Level Diff

Compare texts and highlight differences at the word level.

JSON Tree Viewer

Visualize JSON data as an interactive collapsible tree.

Meta Tag Generator

Generate HTML meta tags, Open Graph, and Twitter Card tags for SEO.

Open Graph Preview

Preview how your page looks when shared on Facebook, LinkedIn, and X.

SVG to CSS Background

Convert SVG code to a CSS background-image data URI.

Tailwind to CSS

Convert Tailwind CSS utility classes to plain CSS properties.

Favicon Generator

Generate favicon PNG files from text or emoji with custom colors.

JWT Generator

Generate JWT tokens with custom header and payload for testing.

User Agent Parser

Parse user agent strings to detect browser, OS, and device type.

Placeholder Image Generator

Generate custom placeholder images with specified dimensions and colors.

Crypto

Bcrypt Hash Generator

Generate bcrypt-format password hashes with configurable rounds.

TOML to JSON

Convert TOML configuration files to JSON format.

IP Address Info

Show your current public IP address, location, ISP, and timezone.

Code to Image

Turn code snippets into beautiful shareable PNG images.

Epoch Countdown Timer

Live Unix epoch clock with countdown timer to any date.

Box Shadow Generator

Generate CSS box-shadow with visual preview and live controls.

CSS Gradient Generator

Create linear and radial CSS gradients with color picker and angle control.

Flexbox Generator

Visual flexbox layout builder with live preview and CSS output.

.env ↔ JSON Converter

Convert between .env files and JSON format.

Text to Binary

Convert text to binary representation and back.

ASCII Art Generator

Convert text into ASCII art using canvas rendering.

Docker Run to Compose

Convert docker run commands to docker-compose.yml format.

Nginx Config Generator

Generate Nginx reverse proxy configs with SSL, gzip, and caching.

SQL to MongoDB

Convert SQL queries to MongoDB shell commands.

DNS Lookup

Query DNS records (A, AAAA, MX, NS, TXT, CNAME) for any domain.

SSL Certificate Checker

Check SSL certificate validity, issuer, expiration, and protocol for any domain.

Calculator

IP Subnet Calculator

Calculate network address, broadcast, host range, and subnet mask from CIDR notation.

Robots.txt Generator

Generate robots.txt files with custom user-agent rules and sitemap URL.

Color Palette Generator

Generate harmonious color palettes using color theory (analogous, complementary, triadic).

Border Radius Visualizer

Visualize and generate CSS border-radius with individual corner controls.

XML Formatter

Format and minify XML documents with proper indentation.

Productivity

Pomodoro Timer

Focus timer with 25-minute work sessions and 5-minute breaks.

Typing Speed Test

Test your typing speed (WPM) and accuracy with random programming quotes.

Barcode Generator

Generate barcode images from text with download option.