JSON Formatter & Validator
Format, prettify, and validate JSON instantly in your browser. No upload required — completely private and free.
XML Formatter & Validator
Format, prettify, and validate XML instantly in your browser. No upload required — completely private and free.
HTML Minifier
Minify and compress HTML code instantly in your browser. Remove comments, collapse whitespace, and reduce file size. Free and private.
CSS Minifier
Minify and compress CSS stylesheets instantly in your browser. Remove comments, collapse whitespace, and reduce file size. Free and private.
JavaScript Minifier
Minify and compress JavaScript code instantly in your browser. Remove comments, collapse whitespace, and reduce file size. Free and private.
URL Encoder / Decoder
Encode and decode URLs and URI components instantly in your browser. Free, private, and no upload required.
Base64 Encoder / Decoder
Encode text or files to Base64 and decode Base64 strings instantly in your browser. Free, private, and no upload required.
MD5 Hash Generator
Generate MD5 hashes from text or files instantly in your browser. Free, private, and no upload required.
SHA Hash Generator
Generate SHA-1, SHA-256, and SHA-512 hashes from text or files instantly in your browser. Uses the Web Crypto API — completely private and free.
Bcrypt Password Generator
Generate secure bcrypt password hashes instantly in your browser. Choose your cost factor and hash passwords client-side — completely private and free.
UUID / GUID Generator
Generate UUID v4 (GUID) values instantly in your browser. Free, private, and client-side — no data sent to any server.
JWT Token Decoder
Decode JWT (JSON Web Token) header and payload instantly in your browser. Free, private, and client-side — no data sent to any server.
Cron Expression Generator
Generate, explain, and validate cron expressions instantly in your browser. Visual builder and expression parser — free, private, and client-side.
Regex Tester
Test and debug regular expressions instantly in your browser. Highlight matches, view capture groups, and use replace mode — free and private.
IP Address Lookup & Geolocation
Look up any IP address and get geolocation data including country, region, city, ISP, and more. Free, fast, and private.
MAC Address Vendor Lookup
Look up the manufacturer and vendor of any device by its MAC address OUI. Instantly identify network hardware makers. Free, fast, and private.
DNS Record Lookup & Query
Look up DNS records for any domain. Query A, AAAA, CNAME, MX, TXT, NS, SOA records instantly using Cloudflare DoH. Free and private.
HTTP Headers Viewer
View your browser request headers and explore common HTTP headers with descriptions. Free, fast, and private.
User-Agent Parser
Parse any User-Agent string to detect browser, OS, device type, and rendering engine. Free, instant, and fully client-side.
.htaccess to Nginx Config Converter
Convert Apache .htaccess rules to Nginx configuration instantly in your browser. Free, private, and client-side — no data sent to any server.
cURL Command to Fetch/Axios Converter
Convert cURL commands to JavaScript fetch() or Axios code instantly in your browser. Free, private, and client-side — no data sent to any server.
Postman Collection to OpenAPI Converter
Convert Postman Collection v2.1 JSON to OpenAPI 3.0 YAML or JSON instantly in your browser. Free, private, and client-side — no data sent to any server.
OpenAPI to TypeScript Interfaces
Convert OpenAPI 3.0 schemas to TypeScript interfaces and types instantly in your browser. Free, private, and client-side — no data sent to any server.
CSS Flexbox Layout Generator
Visually generate CSS Flexbox layouts with live preview. Adjust flex-direction, justify-content, align-items, and more — free and client-side.
CSS Grid Layout Generator
Visually generate CSS Grid layouts with live preview. Adjust grid-template-columns, rows, gap, justify-items, align-items, and more — free and client-side.
CSS Gradient Generator
Visually generate CSS gradients with live preview. Create linear, radial, and conic gradients with custom color stops — free and client-side.
Box Shadow Generator
Visually generate CSS box-shadow with live preview. Add multiple shadow layers, adjust blur, spread, color, and inset — free and client-side.
Border Radius Playground
Visually adjust CSS border-radius with live preview. Design circles, pills, squircles and more — free and client-side.
Neumorphism CSS Generator
Generate neumorphism (soft UI) CSS with live preview. Adjust colors, shadows, and shapes to create beautiful soft-raised elements — free and client-side.
Glassmorphism CSS Generator
Create stunning glassmorphism card effects with real-time preview. Customize blur, opacity, and colors instantly.
SVG Placeholder Image Generator
Generate custom SVG placeholder images for web development. Set dimensions, colors, and text instantly.
Lorem Ipsum Generator
Generate placeholder text in various lengths and themes for your designs and mockups.
Random User Data Generator (JSON/CSV)
Generate realistic fake user data for testing and development. Export as JSON or CSV instantly.
Password Strength Checker
Check your password strength instantly. Get real-time feedback on security, entropy, and time to crack estimates.
Keycode / ASCII Character Tool
Press any key to see its keyCode, charCode, and Unicode value. Browse the complete ASCII character table.
Dockerfile Generator for Node.js
Generate production-ready Dockerfiles for Node.js apps. Supports Express, Next.js, NestJS, and more with best practices.
.gitignore Generator
Generate .gitignore files for any tech stack. Select your languages, frameworks, and tools to get a clean, organized ignore file.
README.md Template Generator
Generate professional README.md templates for your GitHub projects. Customize sections, badges, and formatting in seconds.
Changelog Formatter
Format changelogs following the Keep a Changelog standard. Create new entries or clean up existing CHANGELOG.md files.
chmod Permission Calculator
Calculate Unix file permissions with chmod. Convert between symbolic and numeric (octal) notation instantly.
Unicode Character Finder
Search and find Unicode characters by name, codepoint, or category. Copy characters, HTML entities, and codepoints instantly.
REST API Tester
Test REST APIs directly in your browser. Send GET, POST, PUT, DELETE requests and inspect responses instantly — no install needed.
SSL Certificate Checker & Decoder
Check SSL certificates for any domain and decode PEM certificate files to view expiry dates, issuer, and certificate details.
WebSocket Connection Tester
Test WebSocket connections directly in your browser. Connect to any ws:// or wss:// server, send messages, and inspect real-time responses.
String Case Converter
Convert text between camelCase, PascalCase, snake_case, kebab-case, SCREAMING_SNAKE, and more — instantly, with one click.
Diff Checker
Compare two text blocks and find differences instantly. Highlights added, removed, and changed lines with color-coded visual diffs.
.env File Validator
Validate .env environment variable files for syntax errors, duplicate keys, empty values, and security issues. Runs locally in your browser.
Port Scanner
Check which common web ports are open or accessible on a hostname. Tests HTTP connectivity to ports 80, 443, 8080 and more — no install required.
CSS Triangles Generator
Generate CSS border-trick triangles instantly. Configure direction, color, and size, then copy the ready-to-use CSS code. Free, no install required.
QR Code Generator
Generate QR codes for URLs, text, and WiFi credentials instantly in your browser. Free, secure, and no upload required.
Barcode Generator
Generate barcodes (Code128, EAN-13, UPC-A, Code39) instantly in your browser. Free, secure, and no upload required.
Flowchart Maker
Create flowcharts from simple text syntax. Type your steps and see a live diagram instantly. Free, no sign-up required.
Directory Tree Generator
Generate ASCII directory tree structures instantly. Type your folder hierarchy and get a formatted tree with ├── └── │ characters.
3D CSS Cube Generator
Generate 3D CSS cube animations with custom colors, sizes, and effects. Copy the generated HTML and CSS code instantly.
Random Fake Address Generator
Generate realistic fake addresses for testing and development. Supports US, UK, Japan, Canada, Australia, Germany, and France. Free, instant, and runs in your browser.
Credit Card Number Validator Luhn Algorithm
Validate credit card numbers using the Luhn algorithm. Instantly detect card type (Visa, Mastercard, Amex, Discover, JCB, UnionPay). Free, private, and runs entirely in your browser.
IBAN Validator MOD-97 Check
Validate IBAN numbers instantly using the MOD-97 algorithm. Check country code, format, and check digits. Free, private, runs entirely in your browser.
Bank Code Parser & Validator
Parse and validate international bank identifier codes. Break down any code into its components.
Zip Code / Postal Code Lookup
Validate and look up postal code formats for countries worldwide. Check if your ZIP or postal code matches the correct format.
Text Encoding Configurator
Encode and decode text in multiple formats: Base64, URL Encoding, HTML Entities, Hex, Binary, Unicode Escape, ROT13, and Morse Code. Fast, free, and client-side.
Ping Sweep Script Generator
Generate ping sweep scripts for network scanning in Bash, PowerShell, or Python.
Subnet Mask Calculator
Calculate network address, broadcast address, and host range for any IP/CIDR combination.
IPv4 to IPv6 Converter
Convert IPv4 addresses to IPv6 format including mapped and compatible representations.
CIDR to IP Range Calculator
Convert CIDR notation to IP address range, showing network, broadcast, and all host addresses.
WiFi Password QR Generator
Generate a QR code for your WiFi network so guests can connect instantly by scanning.
URL Parameters Extractor
Extract and analyze URL query parameters, path, host, and all URL components instantly.
Clean URL Generator
Strip UTM parameters, fbclid, gclid, and other tracking tags from URLs instantly.
Deep Link Generator
Generate deep links for iOS and Android apps including YouTube, Instagram, Spotify and more.
App Store Link Maker
Generate geo-specific App Store and Google Play links for any app and country.
Spotify URI to Web Link Converter
Convert Spotify URIs to web links or vice versa, and generate embed codes for any track, album, or playlist.
Amazon Affiliate Link Cleaner
Clean Amazon URLs and add your affiliate tag to generate short, clean affiliate links.
Mailto: Link Generator
Generate mailto: links with pre-filled subject, body, CC, and BCC for websites and emails.
Tel: Link Generator
Generate clickable tel: links for phone numbers to use on websites and in HTML.
SMS Link Generator
Generate clickable sms: links with pre-filled messages for websites and HTML.
Magnet Link Parser & Builder
Parse magnet links to extract info hash, trackers, and metadata, or build magnet links from components.
Wayback Machine Link Finder
Generate Web Archive (Wayback Machine) links to view, browse, and save any URL's history.
CSS Animation Builder
Build CSS keyframe animations visually. Preview animations in real-time and copy the generated CSS code instantly.
Code Typing Speed Test
Test your coding typing speed with real code snippets. Measure WPM, accuracy, and improve your developer typing skills.
Regular Expression Crossword Puzzle
Solve crossword puzzles where every row and column must match a regular expression pattern. Learn regex through fun interactive puzzles.
JavaScript Syntax Quiz
Test your JavaScript syntax knowledge with multiple-choice questions covering variables, functions, arrays, objects, promises, and ES6+ features.
CSS Selectors Quiz
Test your CSS selectors knowledge with multiple-choice questions covering element selectors, pseudo-classes, pseudo-elements, combinators, and specificity.
HTML5 Elements Quiz
Test your HTML5 knowledge with multiple-choice questions covering structural elements, semantic tags, forms, media, and attributes.
Dummy JSON API for Frontend Testing
Generate realistic dummy JSON data for frontend testing. Fetch users, products, posts, comments, todos, recipes, and quotes from the dummyjson.com API instantly. No auth required.
Web Scraper CSS Selector Tester
Test CSS selectors against any webpage or pasted HTML. Build and debug web scraping rules with live match highlighting and extracted value preview.
XPath Tester
Test XPath expressions against XML documents in your browser
JSONPath Tester
Test JSONPath expressions against JSON data in your browser
GraphQL Query Formatter
Format and beautify GraphQL queries, mutations and subscriptions
cURL Builder UI
Visually build cURL commands for HTTP requests
Webhook Catcher & Tester
Generate test webhook payloads and cURL commands for webhook testing
IFTTT Applet Maker
Design IFTTT-style automation applets and generate configuration JSON
Zapier Integration Setup Helper
Plan and document Zapier automation workflows with a visual builder
Notion Template Link Generator
Generate shareable Notion template duplicate links from any Notion page URL
Airtable Formula Tester
Test and validate Airtable formula syntax with a built-in function reference
Google Sheets Query Formatter
Format and build Google Sheets QUERY function syntax visually
Excel Formula Explainer
Paste any Excel or Google Sheets formula to get a plain-language explanation
Regular Expression Explainer
Paste any regex pattern to get a plain-language explanation of what it matches
Crontab Guru
Explain cron schedule expressions in plain language and calculate next run times
App Store Review URL Generator
Generate Apple App Store review links to make it easy for users to leave reviews for your app.
Play Store App Link Generator
Generate Google Play Store links for apps, including review and deep links
Git Commit Message Generator
Generate conventional commit messages following the Angular commit convention. Free, instant, and works entirely in your browser.
Pull Request Template Generator
Generate customizable GitHub and GitLab pull request templates in Markdown
Issue Template Generator
Generate GitHub and GitLab issue templates for bug reports and feature requests
Semantic Versioning Bumper
Bump semantic version numbers following semver.org rules for MAJOR, MINOR, and PATCH releases.
License Chooser
Choose the right open source license for your project and generate the license text
Markdown Badge Generator
Generate shields.io badges for GitHub READMEs with a visual builder
Tech Stack Icon Shield Generator
Generate tech stack badge shields with icons for your GitHub README
URL Shortener
Shorten long URLs using popular URL shortening services with one click
JSON to TOML Converter
Convert JSON objects to TOML format instantly. Clean, structured output perfect for config files and project settings.
TOML to JSON Converter
Convert TOML configuration files to JSON format instantly. Free, client-side, no data sent to servers.
TOML to YAML Converter
Convert TOML configuration files to YAML format instantly. Free, client-side, no data sent to servers.
YAML to TOML Converter
Convert YAML to TOML format instantly. Free, browser-based converter — no data sent to servers. Perfect for config file migration.
INI to JSON Converter
Convert INI configuration files to JSON format instantly. Supports sections, key-value pairs, comments, and quoted strings.
JSON to INI Converter
Convert JSON objects to INI configuration file format instantly. Supports sections, key-value pairs, arrays, and booleans.
Essential Developer Utilities
Modern software development involves constant format juggling — serialising data, encoding strings, generating hashes, testing patterns, and debugging API responses. Our developer tools are built to handle these everyday tasks without requiring you to install CLI tools, open a terminal, or visit multiple websites. Everything runs in your browser with zero setup.
Developer Workflow Tips
- Use the JSON formatter to quickly validate API responses before writing parsing code — it catches syntax errors instantly.
- When debugging encoding issues, try our Base64 and URL encoder/decoder to verify that strings are properly encoded at each layer.
- Generate strong .gitignore files for your stack to avoid accidentally committing build artefacts and sensitive files.
- Use the diff tool to compare configuration files across environments — it highlights exactly what changed.
- Keep the regex tester open while writing patterns — live testing catches edge cases before they reach production.
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Frequently Asked Questions
Are these tools suitable for production data?
Yes, with an important advantage: since all processing happens in your browser, sensitive data like API keys, tokens, and configuration files never leave your device. This makes our tools safer than cloud-based alternatives for handling production data.
Do the tools support large datasets?
Most tools handle data up to several megabytes comfortably. For very large files (e.g., 50MB+ JSON), performance depends on your device. We recommend using the tools for inspection and debugging rather than bulk data transformation.
Can I save my work between sessions?
Most tools let you copy or download the output. We don't store any data between sessions for privacy reasons, so make sure to save your results before closing the tab.