Generators
.htaccess Generator
Generate .htaccess rules for Apache servers. HTTPS redirect, caching, GZIP compression, security headers, and custom redirects.
Free Web Developer Tools
Online utilities for developers — formatters, generators, converters, and more. All tools run in your browser, no data is sent to any server.
Calculators
Aspect Ratio Calculator
Calculate aspect ratios from dimensions or find dimensions from ratios. Common presets and CSS aspect-ratio output.
Converters
Base64 Encode/Decode
Encode text to Base64 or decode Base64 strings online. Supports URL-safe encoding.
Calculators
Bitwise Calculator
Perform bitwise operations (AND, OR, XOR, NOT, shifts) on numbers. View results in decimal, hex, binary, and octal.
Design
Border Radius Generator
Design CSS border-radius visually with linked or individual corner controls. Presets for circle, pill, and squircle shapes.
Design
Box Shadow Generator
Create custom CSS box shadows with multiple layers, color, blur, spread, and inset options. Live preview and copy CSS.
Checkers
Browser Feature Detector
Detect which web APIs and CSS features your browser supports. Tests 36 features across Core, CSS, APIs, and Storage categories.
Calculators
Byte Unit Converter
Convert between byte units — bits, bytes, KB, MB, GB, TB, PB. Toggle between SI (1000) and IEC (1024) standards.
Calculators
Chmod Calculator
Visual chmod permission calculator. Toggle read, write, execute per user/group/other. Shows numeric and symbolic notation.
Converters
Color Converter (HEX/RGB/HSL)
Convert colors between HEX, RGB, HSL, RGBA, HSLA, and HEX8 formats instantly with a visual color picker.
Design
Color Palette Generator
Generate harmonious color palettes from any base color. Complementary, analogous, triadic, and monochromatic schemes.
Checkers
Contrast Checker (WCAG)
Check color contrast ratios against WCAG 2.1 AA and AAA guidelines for accessible web design.
Generators
CORS Header Configurator
Generate CORS (Cross-Origin Resource Sharing) headers for Apache, Nginx, and Express.js. Configure origins, methods, and credentials.
Generators
Cron Expression Builder
Build cron expressions visually with dropdowns and common presets. See human-readable descriptions of your schedule.
Reference
Crontab Cheatsheet
Interactive cron expression builder and reference. Build cron schedules visually and browse common patterns.
Generators
CSP Header Generator
Generate Content-Security-Policy headers. Configure directives for scripts, styles, images, fonts, and more.
Design
CSS Animation Generator
Build CSS animations visually with keyframe editor, timing functions, and live preview. Generate @keyframes and animation CSS.
Design
CSS Clip-Path Maker
Create CSS clip-path shapes visually. Drag points to customize polygons, circles, and ellipses with live preview.
Design
CSS Filter Generator
Generate CSS filter effects with live preview. Adjust blur, brightness, contrast, grayscale, hue-rotate, and more.
Design
CSS Gradient Generator
Create beautiful CSS gradients visually. Choose colors, direction, and type, then copy the CSS code.
Design
CSS Grid Layout Generator
Build CSS Grid layouts visually. Set columns, rows, gaps, templates, and alignment. Copy ready-to-use CSS code.
Formatters
CSS Minifier
Minify CSS to reduce file size by removing comments, whitespace, and unnecessary characters. Includes beautifier.
Converters
CSS Units Converter
Convert between px, rem, em, %, vw, vh, pt, cm, mm, and in. Configurable base font size and viewport dimensions.
Converters
CSV to JSON Converter
Convert CSV data to JSON arrays with auto-detection of delimiters. Table preview, custom options, and proper CSV parsing.
Design
Cubic Bezier Editor
Create custom CSS cubic-bezier timing functions with a visual curve editor. Drag control points and preview animations.
Calculators
Development Timeline Estimator
Estimate project timelines using PERT methodology. Optimistic, likely, and pessimistic estimates with Gantt visualization.
Checkers
Diff Checker (Text Compare)
Compare two texts side-by-side with highlighted additions, deletions, and line numbers. Unified and split view modes.
Generators
Docker Compose Generator
Generate Docker Compose YAML files with an interactive builder. Add services, configure ports, volumes, and environment variables.
Reference
Emoji Picker & Copy
Browse and search 500+ emojis by category. Click to copy. Shows Unicode code points and remembers recent picks.
Checkers
Encoding Detector
Detect text encoding format: UTF-8, Base64, URL-encoded, HTML entities, hex, binary, JWT. Auto-decode detected formats.
Generators
Env File Generator
Generate .env files with key-value pairs. Choose from presets for Node.js, Laravel, Django, and Rails projects.
Design
Flexbox Playground
Interactive CSS Flexbox playground. Experiment with flex-direction, justify-content, align-items, wrap, gap, and more.
Reference
Git Command Reference
Searchable reference of 45 git commands with syntax, flags, examples, and descriptions. Organized by category.
Generators
GitHub Actions Generator
Generate GitHub Actions workflow YAML files. Configure triggers, Node.js versions, build steps, and deployment targets.
Design
Glassmorphism Generator
Create frosted glass CSS effects with customizable blur, transparency, and border. Live preview over gradient backgrounds.
Design
Gradient Text Generator
Create gradient text effects with CSS. Choose linear or radial gradients, customize colors, and preview in real-time.
Converters
Hash Generator (MD5/SHA)
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text input. Real-time computation using Web Crypto API.
Checkers
Headline Analyzer
Analyze headlines for effectiveness. Score based on word count, power words, emotional impact, and readability.
Reference
HTML Character Reference
Searchable reference of 130+ HTML entities with character preview, entity names, numbers, hex codes, and categories.
Converters
HTML Entity Encoder/Decoder
Encode special characters as HTML entities or decode entities back to characters. Named, decimal, and hex formats.
Generators
HTML Table Generator
Build HTML tables visually with an editable grid. Set rows, columns, headers, borders, and import from CSV.
Converters
HTML to Markdown Converter
Convert HTML to clean Markdown. Handles headings, links, images, lists, tables, code blocks, and formatting.
Reference
HTTP Status Code Reference
Searchable reference of 63 HTTP status codes with descriptions, categories, and common usage examples.
Converters
Image to Base64 Converter
Convert images to Base64 data URIs for embedding in HTML, CSS, or JavaScript. Supports drag-and-drop upload.
Calculators
IPv4 Subnet Calculator
Calculate IPv4 subnet details. Get network address, broadcast, host range, wildcard mask, and binary representation.
Formatters
JavaScript Minifier
Minify JavaScript code by removing comments and whitespace. Client-side processing for privacy.
Formatters
JSON Formatter & Validator
Format, validate, and minify JSON data online. Paste your JSON and get instant formatting with syntax highlighting.
Converters
JSON to CSV Converter
Convert JSON arrays to CSV and CSV to JSON. Handles nested objects with dot notation. Custom delimiters and table preview.
Converters
JSON to Go Struct
Convert JSON data to Go struct definitions with json tags. Handles nested structs and proper Go naming conventions.
Converters
JSON to Python Dataclass
Convert JSON data to Python dataclass definitions with type annotations. Supports Optional types and frozen classes.
Converters
JSON to TypeScript
Convert JSON data to TypeScript interfaces. Handles nested objects, arrays, and optional properties.
Converters
JWT Decoder
Decode and inspect JSON Web Tokens. View header, payload, expiration status, and claims without server-side processing.
Reference
Keyboard Shortcuts Reference
Quick reference for keyboard shortcuts in VS Code, Chrome DevTools, Git, Terminal, macOS, and Windows.
Checkers
Keyword Density Checker
Check keyword density in your content. Analyze word frequency, n-gram phrases, and optimize for target keywords.
Generators
Lorem Ipsum Generator
Generate placeholder text in paragraphs, sentences, or words. Plain text or HTML format.
Converters
Markdown to HTML Converter
Convert Markdown to HTML with live preview. Supports headings, lists, links, code blocks, and more.
Generators
Meta Tag Generator
Generate HTML meta tags for SEO, Open Graph, and Twitter Cards with a live Google SERP preview.
Reference
MIME Type Lookup
Search 90 MIME types by file extension or type string. Categorized reference with copy-to-clipboard support.
Design
Neumorphism Generator
Generate soft UI (neumorphic) CSS effects with customizable depth, intensity, and shape states. Flat, concave, convex, and pressed.
Generators
Nginx Config Generator
Generate Nginx server block configurations. Configure SSL, PHP-FPM, reverse proxy, caching, and security headers.
Calculators
Number Base Converter
Convert numbers between binary, octal, decimal, hexadecimal, and custom bases (2-36). Live conversion as you type.
Seo
Open Graph Preview
Preview how your links appear on Facebook, Twitter, LinkedIn, and Slack. Generate Open Graph and Twitter Card meta tags.
Generators
Password Generator
Generate secure random passwords with customizable length, character types, and strength meter. Bulk generation supported.
Checkers
Password Strength Analyzer
Analyze password strength in real-time. Check entropy, character diversity, crack time estimates, and get improvement suggestions.
Converters
Pixel to REM Converter
Convert between px and rem units with a configurable base font size. Quick reference table and batch conversion.
Design
Placeholder Image Generator
Generate placeholder images with custom dimensions, colors, and text. Download as SVG or PNG for mockups and prototypes.
Calculators
Project Cost Calculator
Calculate project costs with team roles, hourly rates, overhead, and profit margin. Breakdown by role with burn rate analysis.
Generators
QR Code Generator
Generate QR codes from text or URLs with customizable size, colors, and error correction level. Download as PNG.
Checkers
Readability Score Calculator
Calculate readability scores including Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog, and more.
Calculators
Reading Time Calculator
Calculate reading and speaking time for any text. Get word count, sentence count, paragraph count, and detailed statistics.
Reference
Regex Cheatsheet
Interactive regex reference with live testing. Search patterns by category, test against sample strings, and copy expressions.
Checkers
Regex Tester
Test regular expressions in real-time with match highlighting, capture group details, and flag support.
Checkers
Responsive Breakpoint Viewer
Preview websites at common responsive breakpoints. Test mobile, tablet, and desktop views with custom dimensions.
Generators
Robots.txt Generator
Build robots.txt files visually. Add user-agent rules, allow/disallow paths, sitemap URL, and common presets.
Generators
Schema Markup Generator
Generate JSON-LD structured data for 8 schema types: Article, LocalBusiness, Product, FAQ, HowTo, Person, Organization, Event.
Checkers
Screen Resolution Detector
Detect your screen resolution, viewport size, device pixel ratio, color depth, and matching device name. Live updates on resize.
Calculators
Sprint Velocity Calculator
Track sprint velocity with average, standard deviation, and backlog forecasting. Visual trend chart for agile teams.
Formatters
SQL Formatter
Format and beautify SQL queries with proper indentation, keyword uppercasing, and syntax highlighting. Minify option included.
Converters
SQL to MongoDB Converter
Convert SQL queries to MongoDB query syntax. Supports SELECT, WHERE, INSERT, UPDATE, DELETE, ORDER BY, and LIMIT.
Generators
SRI Hash Generator
Generate Subresource Integrity (SRI) hashes for scripts and stylesheets. Supports SHA-256, SHA-384, and SHA-512.
Generators
SSH Config Generator
Generate SSH client configuration files. Define host aliases, connection settings, identity files, and proxy configurations.
Checkers
SSL Certificate Decoder
Decode and inspect PEM-encoded SSL/TLS certificates. View subject, issuer, validity dates, and Subject Alternative Names.
Calculators
Story Points Estimator
Fibonacci-based story point estimation tool. Select point cards, track tasks, and export estimates as CSV.
Design
SVG Favicon Generator
Create SVG favicons from emoji or characters. Preview at multiple sizes and get HTML link tags ready to paste.
Converters
SVG Optimizer
Optimize SVG code by removing comments, metadata, and unnecessary attributes. Preview optimized SVG and see size savings.
Design
SVG Wave Generator
Generate SVG wave dividers for your website. Customize height, layers, colors, and complexity with live preview.
Design
Tailwind CSS Color Finder
Find the closest Tailwind CSS color for any hex value. Browse the complete Tailwind color palette with all shades.
Converters
Text Case Converter
Convert text between 11 case formats: UPPER, lower, Title, Sentence, camelCase, PascalCase, snake_case, kebab-case, and more.
Design
Text Shadow Generator
Generate CSS text-shadow effects with live preview. Create multiple shadows, use presets for neon, 3D, and retro effects.
Calculators
Typography Scale Calculator
Calculate a modular type scale with customizable base size and ratio. Generate CSS custom properties for your typography system.
Calculators
Unix Permissions Visualizer
Visualize and calculate Unix file permissions. Convert between octal, symbolic notation, and interactive checkboxes.
Converters
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates. View current time, relative dates, and multiple formats.
Converters
URL Encoder/Decoder
Encode or decode URLs and URI components online. Supports space-as-plus encoding.
Converters
URL Slug Generator
Convert titles and text to clean URL slugs. Options for separator, case, max length, and accent transliteration.
Generators
UUID Generator
Generate random UUIDs (v4) and timestamp-based UUIDs online. Bulk generation with formatting options.
Calculators
Viewport Units Calculator
Convert between px and viewport units (vw, vh, vmin, vmax). Auto-detect viewport size with formula reference.
Checkers
Word & Character Counter
Count words, characters, sentences, and paragraphs with reading time estimation and keyword frequency analysis.
Formatters
XML Formatter
Format, validate, and minify XML with proper indentation and syntax highlighting. Shows tag count statistics.
Generators
XML Sitemap Generator
Generate valid XML sitemaps from a list of URLs. Set change frequency, priority, and last modified dates.
Converters
YAML to JSON Converter
Convert between YAML and JSON formats. Supports nested objects, arrays, and common YAML features bidirectionally.
