Developer Tools

JSON Formatter & Validator

Paste your JSON into this JSON formatter to pretty-print, minify, and validate instantly. Customizable indentation, syntax highlighting, and error detection.

CSS Box Shadow Generator

Generate CSS box shadows visually with multiple layers, inset shadows, and live preview. Copy clean code with one click.

CSS Gradient Generator

Create CSS gradients visually with linear, radial, and conic types. Add color stops, adjust angles, and copy the generated code.

Base64 Encode/Decode

Encode text to Base64 or decode Base64 strings instantly. Supports UTF-8 with auto-detection, one-click copy, and file encoding.

Color Converter

Convert HEX, RGB, HSL, and CMYK instantly. Live colour swatch, shorthand hex expansion, and one-click copy for every format.

Regex Tester

Online regex tester that highlights matches in real time. See capture groups, match details, and use common pattern presets.

Code to Image Converter

Turn code snippets into beautiful images with syntax highlighting, themes, and custom backgrounds. Export as PNG for sharing.

Cron Expression Builder

Build and validate cron expressions visually. See the human-readable schedule and next execution times for any crontab instantly.

CSS Border Radius Generator

Create CSS border radius values with independent corner controls, preset shapes, and a live preview. Copy the code instantly.

.htaccess Generator

Generate htaccess rules for 301 redirects, rewrite URL, HTTPS, caching, and WordPress. Copy or download the file instantly.

Password Strength Analyzer

Analyze how strong your password is in real time. Checks length, character variety, common patterns, and estimates time to crack.

JWT Decoder

This JWT decoder lets you inspect JSON Web Tokens in your browser. View header, payload, signature, expiration status, and claims instantly.

URL Encode/Decode

Free URL encoder and decoder for percent-encoding full URLs and query parameters. Supports both encodeURI and encodeURIComponent modes.

HTML Minifier

Minify or beautify HTML by removing comments, collapsing whitespace, and simplifying boolean attributes. See exact bytes saved instantly.

CSS Minifier & Beautifier

A CSS minifier and beautifier that reduces file size or formats compressed CSS for readability. Shows original size, minified size, and savings.

JavaScript Minifier

Minify JavaScript by removing comments and whitespace. See original vs minified size with bytes saved and percentage reduction.

SQL Formatter

Format and prettify messy SQL queries with proper indentation, keyword casing, and line breaks. Runs entirely in your browser.

HTML Entity Encode/Decode

Use this HTML entity encoder decoder to convert special characters to HTML entities and back. Encode text for safe embedding or decode entity references.

HTML Formatter

Free HTML formatter that prettifies messy markup with proper indentation or minifies to reduce size. 2-space, 4-space, or tab options, online and free.

JavaScript Formatter

Format and prettify minified JavaScript or JSON with proper indentation and line breaks. Configurable tab size, runs in your browser.

Color Contrast Checker

Check color contrast ratios against WCAG 2.1 standards. See pass/fail results for AA and AAA levels with live preview and suggestions.

Markdown Preview

This markdown preview tool lets you write and render Markdown side by side. Supports headers, lists, code blocks, links, bold, italic, and more.

JSON Tree Viewer

Paste JSON and explore it as an interactive collapsible tree. Search, copy paths, and inspect values at any depth.

CSS Glassmorphism Generator

Generate CSS glassmorphism effects with backdrop blur, transparency, and border controls. Live preview over a colorful background.

CSS Clip Path Generator

Generate CSS clip-path shapes visually. Drag polygon points, adjust circles and ellipses, and copy the generated code.

Meta Tag Generator

Generate HTML meta tags, Open Graph, and Twitter Card tags for your pages. See a live preview of how links appear when shared.

Chmod Calculator

Calculate Unix file permissions with an interactive chmod calculator. Toggle read, write, and execute for owner, group, and other.

PX to REM Converter

Free PX to REM converter with configurable base font size, quick reference table, and bulk conversion for multiple values at once.

Regex Cheat Sheet

Interactive regex reference with anchors, quantifiers, groups, lookahead, and flags. Each pattern has a try-it button for the regex tester.

HTTP Status Codes Reference

Searchable reference of all HTTP status codes with descriptions. Filter by category - 1xx, 2xx, 3xx, 4xx, and 5xx responses.

Credit Card Validator

Validate credit card numbers using the Luhn algorithm. Detect Visa, Mastercard, Amex, and more card types instantly.

IBAN Validator

Use this IBAN validator to check International Bank Account Numbers with mod-97 checksum verification. Detects country, check digits, and BBAN format.

YAML to JSON Converter

This YAML to JSON converter lets you switch between YAML and JSON formats instantly. Bidirectional with a lightweight browser-based parser.

JSON to CSV Converter

Convert JSON arrays to CSV format and back. Auto-detect columns, flatten nested objects, preview as a table, and download as a .csv file.

XML to JSON Converter

This XML to JSON converter transforms XML documents into JSON and back. Handles attributes, nested elements, and sibling arrays.

Subnet Calculator

Free subnet calculator - get network address, broadcast address, usable host range, wildcard mask, and IP class from any CIDR or subnet mask.

XML Formatter

Format, beautify, and validate XML online with syntax highlighting. Paste minified XML and get clean indented output instantly.

CSS Loader Generator

Create animated CSS loading spinners with customisable style, size, colour, and speed. Copy the generated CSS and HTML with one click.

CSS Cubic Bezier Generator

Design CSS transition timing functions by dragging control points on a visual bezier curve editor. Copy the cubic-bezier value.

CSS Triangle Generator

Generate pure CSS triangles using the border trick. Pick direction, size, and colour with a live preview. Copy the CSS code.

Bcrypt Hash Generator

Generate and verify bcrypt password hashes in your browser. Adjustable cost factor from 4 to 12 rounds, with instant verification mode.

HMAC Generator

Generate HMAC signatures using SHA-256, SHA-384, SHA-512, or SHA-1 with your secret key. Output in hex or base64 format, all in your browser.

Encryption/Decryption Tool

Encrypt and decrypt text using AES-256-GCM with a password. Uses PBKDF2 key derivation and the Web Crypto API, entirely in your browser.

Markdown Table Generator

Build markdown tables visually with a spreadsheet-like editor. Add rows and columns, set alignment, import CSV, and copy the generated markdown.

Google Fonts Pair Finder

Browse 10 curated heading and body Google Fonts pairings. Live preview with custom text and one-click CSS import code, all free.

PPI Calculator

Calculate pixels per inch for any screen. Enter resolution and size to get PPI, aspect ratio, total pixels, and display classification.

JavaScript Keycode Finder

Press any key to see its JavaScript keyCode, key, code, which, and location values. Includes a common keycodes reference table.

User Agent Parser

Parse and detect browser, OS, device type, and engine from any user agent string. Auto-detects your current browser.

MIME Types Reference

Look up MIME types by file extension or search by type string. Covers text, image, audio, video, font, and application types.

ASCII Table

Complete ASCII table showing decimal, hex, octal, binary, and character codes for all 128 values. Searchable, filterable, click to copy.

Screen Resolution Checker

Free screen resolution checker that detects viewport size, device pixel ratio, color depth, and orientation. Live-updating with breakpoint references.

Phone Number Formatter

Parse and format phone numbers into international, national, and E.164 formats. Auto-detects country from prefix with validation.

Email Normalizer

Normalize email addresses by removing dots, plus aliases, and fixing case. Handles Gmail, Outlook, and Yahoo rules. Supports batch mode.

Docker Run to Compose Converter

Convert docker run commands to docker-compose.yml format. Parses ports, volumes, env vars, networks, and all common flags automatically.

Basic Auth Generator

Generate HTTP Basic Authentication headers from a username and password. Outputs Base64, full header, curl command, and fetch example.

RSA Key Pair Generator

Generate RSA key pairs in your browser using the Web Crypto API. Choose 1024, 2048, or 4096-bit keys and export in PEM format.