All Tools
110 tools across 5 catalogs
Developer Tools
Formatters, encoders, generators, and web utilities for developers.
Formatters
JSON Formatter & Validator
Format, validate, and beautify JSON data with syntax highlighting.
YAML Validator
Validate YAML syntax and convert to JSON. Supports Docker Compose, Kubernetes, CI/CD configs.
JSON Minifier
Minify or format JSON with size comparison. Reduce JSON file size by removing whitespace.
SQL Formatter
Format and beautify SQL queries with keyword highlighting.
HTML Beautifier
Format HTML and XML with proper indentation.
CSS Formatter
Beautify and minify CSS code.
XML Formatter
Format and beautify XML documents with proper indentation.
Encoders
Base64 Encode/Decode
Encode text to Base64 or decode Base64 back to text instantly.
Text to Binary
Convert text to binary, hexadecimal, decimal, or octal. Two-way conversion with format selector.
JWT Encoder
Build and sign a JSON Web Token with HS256, HS384 or HS512. Signing runs in your browser — your secret is never sent anywhere.
Base64 to Image
Decode a base64 string or data: URL back into an image, preview it, and download the file. Detects the type and size.
URL Encode/Decode
Encode or decode URLs and query string parameters.
JWT Decoder
Decode and inspect JSON Web Tokens (JWT) header and payload.
HTML Entity Encode/Decode
Convert special characters to/from HTML entities.
Unicode Escape/Unescape
Convert between Unicode escape sequences and readable text.
Generators
Mermaid Diagram Editor
Create flowcharts, sequence diagrams, ER diagrams, Gantt charts and more with Mermaid syntax.
Chmod Calculator
Calculate Linux file permissions. Convert between numeric (755) and symbolic (rwxr-xr-x) formats.
Random Number Generator
Generate random numbers with min/max, count, and unique options.
Barcode Generator
Generate barcodes in Code 128, EAN-13, UPC, Code 39, and more. Download as PNG.
Password Strength Checker
Score a password, see how long a brute-force attack would take, and get told exactly what is weak about it. Runs entirely in your browser.
UUID Generator
Generate random UUID v4 identifiers for your applications.
Regex Tester
Test and debug regular expressions with real-time matching.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text.
Password Generator
Generate strong, secure passwords with custom length and rules.
Cron Expression Builder
Visual builder for cron expressions with presets and human-readable preview.
Fake Data Generator
Generate fake names, emails, addresses, and phone numbers for testing.
Meta Tag Generator
Generate HTML meta tags for SEO, Open Graph, and Twitter Cards.
.gitignore Generator
Generate .gitignore files by selecting languages and frameworks.
README Generator
Generate README.md templates with customizable sections.
Converters
JSON ↔ YAML Converter
Convert between JSON and YAML formats instantly.
JSON Schema Generator
Generate JSON Schema from sample JSON data with automatic type and format detection.
ENV to JSON Converter
Convert .env files to JSON and back. Handles export prefixes, comments, quoting and escapes the way dotenv does.
Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa.
Number Base Converter
Convert numbers between Binary, Octal, Decimal, and Hexadecimal.
JSON ↔ CSV Converter
Convert JSON arrays to CSV and CSV back to JSON.
JSON → TypeScript
Generate TypeScript interfaces from JSON data automatically.
Web
HTTP Status Reference
Searchable reference for all HTTP status codes with descriptions.
API Tester
Send HTTP requests (GET, POST, PUT, DELETE) and inspect responses. Like Postman in your browser.
SQL Playground
Run SQL queries in your browser with in-memory SQLite. Practice joins, aggregations, and more.
Screen Resolution
Check your screen resolution, viewport size, pixel ratio, Tailwind breakpoint, and device info.
What is My IP
Detect your public IP address, timezone, connection type, and browser info.
Code Playground
Live HTML, CSS, and JavaScript editor with instant preview. Like CodePen in your browser.
Robots.txt Generator
Build robots.txt with visual editor for crawl rules and sitemap.
Productivity Tools
Text utilities, timers, converters, and tools to boost your workflow.
Text
Mind Map
Create mind maps from indented text. Visualize ideas and hierarchies instantly.
Meeting Notes
Structured meeting notes template with agenda, action items, and Markdown export.
Text to Slug
Convert text to URL-friendly slugs. Supports kebab-case, snake_case, dot.case with accent removal.
Emoji Picker
Search and copy emojis by category. 150+ emojis across 8 categories with recent history.
Character Counter
Count characters, words, sentences, paragraphs. Check Twitter, Instagram, and other platform limits.
Word Counter
Count words, characters, sentences, and paragraphs in your text.
Lorem Ipsum Generator
Generate placeholder text in paragraphs, sentences, or words.
Markdown Editor
Write and preview Markdown with live rendering side by side.
Text Diff Checker
Compare two texts and highlight the differences line by line.
Case Converter
Convert text between UPPER, lower, Title, camelCase, snake_case, kebab-case, and more.
Remove Duplicate Lines
Remove duplicate lines, trim whitespace, sort alphabetically.
String Escape/Unescape
Escape and unescape strings for JSON, HTML, URL, and SQL.
Text Repeater
Repeat text N times with custom separator.
Notepad
Simple browser-based notepad with auto-save to local storage.
Text to Speech
Read text aloud using browser's Web Speech API with voice selection.
Converters
PDF to Text
Extract text from PDF files in your browser. Download as .txt or copy to clipboard.
Markdown to HTML
Convert Markdown to clean HTML with live preview. Download as .html file.
HTML to Markdown
Convert HTML to Markdown. Supports headings, lists, tables, code blocks, links, and images.
Roman Numeral Converter
Convert between Arabic numbers and Roman numerals (1-3999). Two-way conversion.
Word to PDF
Write in Markdown and save as PDF. Live preview with formatting.
Unit Converter
Convert between units of length, weight, temperature, and more.
Time
Pomodoro Timer
Stay focused with the Pomodoro technique — 25 min work, 5 min break.
Stopwatch
Online stopwatch with lap tracking. Precise to centiseconds.
Kanban Board
Drag-and-drop Kanban board for task management. Add columns, cards, and organize your workflow.
Countdown Timer
Countdown to a specific date and time with live display.
Timezone Converter
Convert time between 15+ timezones worldwide.
Calculators
Age Calculator
Calculate exact age in years, months, days. Zodiac sign, days until birthday, and more.
BMI Calculator
Calculate Body Mass Index with metric or imperial units. BMI category indicator.
Percentage Calculator
Calculate percentages — what is X% of Y, increase, decrease, and more.
Design & Media Tools
Color pickers, image tools, and CSS generators for designers.
Color
Color Picker & Converter
Pick colors and convert between HEX, RGB, HSL, and more.
HEX to RGB Converter
Convert colors between HEX, RGB, HSL formats. Two-way conversion with preview.
Image Colour Palette Extractor
Pull the dominant colours out of any image as hex, CSS variables or JSON. Uses median cut, so distinct hues stay distinct.
Contrast Checker
Check WCAG color contrast ratio for accessibility compliance (AA/AAA).
Palette Generator
Generate harmonious color palettes with multiple harmony modes.
Tailwind Color Finder
Find the closest Tailwind CSS color for any HEX value.
Color Blindness Simulator
Preview how colors look for different types of color vision deficiency.
Image
Image Compressor
Compress PNG, JPEG, and WebP images without losing quality.
Icon Finder
Search and browse 1500+ Lucide icons. Copy import or JSX code with one click.
Social Media Image
Create images for Instagram, Facebook, Twitter, LinkedIn with gradients and text. Download as PNG.
SVG Optimizer
Optimize and minify SVG files. Remove comments, metadata, empty attributes and more.
Image to PDF
Convert multiple images to a single PDF file. Each image becomes one page.
Aspect Ratio Calculator
Calculate aspect ratios, resize proportionally, and get CSS aspect-ratio values.
Image Resizer
Resize images by dimensions or percentage with aspect ratio lock.
Image to Base64
Convert image files to Base64 data URLs.
Placeholder Image Generator
Generate placeholder images with custom size, color, and text.
Image Format Converter
Convert images between PNG, JPEG, and WebP formats.
CSS
CSS Gradient Generator
Create beautiful CSS gradients with a visual editor and copy the code.
Font Pairing
Browse curated Google Font pairings with live preview. Copy CSS import code.
CSS Minifier
Minify or beautify CSS code. Remove comments, whitespace, and optimize selectors.
Box Shadow Generator
Create CSS box-shadow with a visual editor. Multiple layers, inset, copy code.
Border Radius Preview
Visual border-radius editor for all corners with CSS output.
Flexbox Playground
Interactive CSS Flexbox layout builder with live preview and code output.
CSS Grid Generator
Visual CSS Grid layout builder with live preview and code output.
Finance Tools
Calculators and planners for loans, budgets, and investments.
Calculators
Loan Calculator
Calculate monthly payments, interest, and amortization schedules.
Compound Interest Calculator
Calculate compound interest with multiple compounding frequencies.
Tip Calculator
Calculate tips and split bills between multiple people.
Discount Calculator
Calculate discounts, final prices, and compare multiple discount levels.
ROI Calculator
Calculate Return on Investment percentage and net gain/loss.
Business Tools
QR generators, invoice makers, and marketing utilities.
Marketing
QR Code Generator
Generate QR codes for URLs, text, Wi-Fi, and more.
Email Validator
Validate email addresses with format checks, typo detection, and disposable email warnings. Single or bulk mode.
UTM Builder
Build UTM-tagged URLs for campaign tracking in Google Analytics.
Hashtag Generator
Generate relevant hashtags for social media posts by topic.
Email Subject Line Tester
Score email subject lines for open rate optimization with 9 criteria.