Developer Utilities.
Fast, Local & Private.
71 essential developer utilities running 100% client-side in your browser. Zero server uploads, zero trackers, instant sub-millisecond execution.
All Developer Utilities (71)
CSV ↔ JSON
Convert between CSV and JSON formats
YAML ↔ JSON
Convert between YAML and JSON formats
Query Params to JSON
Parse URL query parameters into JSON
Timestamp ↔ Date
Convert between timestamps and human-readable dates
Base64 Encode/Decode
Encode and decode Base64 strings
Hash Generator
Generate MD5, SHA1, SHA256 hashes
JWT Parser
Decode and inspect JSON Web Tokens
UUID Generator
Generate various types of UUIDs
HAR File Viewer
View and analyze HTTP Archive files
Regex Tester
Test regular expressions against sample text
CSS Inliner
Inline CSS for email templates
CSS Units Converter
Convert between CSS units (px, em, rem, etc.)
Number Base Converter
Convert numbers between different bases
HEX ↔ RGB
Convert between HEX and RGB color formats
Image to Base64
Convert images to Base64 encoded strings
Image Resizer
Resize images while maintaining quality
SVG Viewer
Preview and inspect SVG files
Lorem Ipsum Generator
Generate placeholder text for designs
ENV to Netlify TOML
Convert environment variables to Netlify TOML format
URL Encode/Decode
Encode and decode URLs and query parameters for web development
HTML Encode/Decode
Encode and decode HTML entities and special characters for web development
Password Generator
Generate secure passwords with customizable length and character sets
Text Case Converter
Convert text between different cases: uppercase, lowercase, camelCase, PascalCase, and more
JSON Formatter / Validator
Validate, prettify, minify and inspect JSON
QR Code Generator
Generate customizable QR codes for URLs, text, WiFi, contact info and more
XML Formatter
Format, validate, and beautify XML documents with syntax highlighting
Markdown Preview
Live markdown editor with real-time preview and export options
SQL Formatter
Format, beautify and validate SQL queries with syntax highlighting for multiple database types
Image Optimizer
Compress and optimize images while maintaining quality with format conversion support
Scientific Calculator
Advanced mathematical calculator with scientific functions, unit conversions, and expression evaluation
ASCII Art Generator
Convert text and images to ASCII art with customizable fonts, styles, and character sets
Text Diff Checker
Compare two texts side-by-side to see differences.
JSON ➔ TypeScript & Zod
Convert JSON into TypeScript interfaces, types, and Zod schemas
Cron Expression Builder
Build, parse, and translate cron schedules with live upcoming execution preview
cURL ➔ Code Converter
Convert cURL terminal commands into JavaScript Fetch, Axios, Python, and Go
chmod Permissions Calculator
Calculate Unix file permissions with interactive matrix, octal, and symbolic codes
Social Meta Tag & Preview
Generate Open Graph and Twitter meta tags with live Google, Twitter, and Facebook preview
CIDR & Subnet Calculator
Calculate network ranges, usable host IPs, broadcast addresses, and subnets
Docker Compose & Dockerfile Validator
Analyze Dockerfiles and docker-compose files for security pitfalls, port collisions, and best practices
Nginx Config Generator
Generate production-ready Nginx server blocks with SSL, WebSocket proxy, and security headers
Git Command & Rebase Helper
Interactive recipe builder for undoing commits, rebasing, reflog recovery, and squashing
Systemd Service Generator
Generate Linux systemd .service configuration files with restart policies and logs
HTTP Status Code Reference
Searchable directory of standard HTTP response status codes with RFC specifications and fixes
HMAC Generator & Verifier
Generate and verify HMAC signatures (SHA-256, SHA-512) for webhooks and API authentication
RSA & ECDSA Key Pair Generator
Generate PKCS#8 private keys and SPKI public keys client-side with fingerprint verification
Bcrypt Hash Generator & Verifier
Generate Blowfish-based bcrypt password hashes and verify candidate strings with custom salt rounds
Basic Auth Header Generator
Encode credentials into HTTP Authorization Basic headers or decode tokens into usernames and passwords
File Checksum & Integrity Verifier
Calculate MD5, SHA-1, SHA-256, and SHA-512 hashes of local files with zero server uploads
WCAG Contrast Checker
Verify color contrast ratios for text and UI elements against WCAG AA and AAA accessibility standards
CSS Glassmorphism Generator
Design frosted-glass cards, blur filters, and shadows with instant Vanilla CSS and Tailwind exports
CSS Flexbox & Grid Sandbox
Interactive visual playground to test alignment, distribution, and layout mechanics for Flexbox and Grid
CSS Gradient Generator
Craft multi-stop linear, radial, and conic gradients with real-time CSS and Tailwind arbitrary classes
Image Color Palette Extractor
Extract dominant color palettes from any photo or graphic with zero server uploads using HTML5 Canvas
SVG Visualizer & Optimizer
Inspect SVG vector rendering, strip bloated editor metadata, round float coordinates, and minify XML
User-Agent Parser & Tester
Extract browser version, OS, rendering engine, device category, and bot crawler identities
OpenAPI & Swagger Spec Viewer
Visualize OpenAPI 3.0 and Swagger API specifications with endpoint schemas, parameters, and responses
Cookie & Storage Header Inspector
Inspect Set-Cookie headers for SameSite, HttpOnly, and Secure flags, and audit security vulnerabilities
HTML ➔ React JSX & Markdown
Transform standard HTML into valid React JSX with self-closing tags, camelCase styles, and className
Favicon & Web App Icon Generator
Generate standard favicon.ico, Apple Touch icons, Android PWA assets, and HTML meta tags
JSON to SQL Table & Inserts
Infer column schemas, generate CREATE TABLE definitions, and build batch INSERT statements
JSON to CSV & Table Grid
Flatten nested JSON objects, preview in an interactive spreadsheet grid, and export to CSV
XML ↔ JSON Converter
Convert XML documents into structured JSON objects, or serialize JSON trees into clean XML markup
JSON Escaper & Unescaper
Escape JSON payloads for .env and Docker CMD strings, or unescape double-escaped logs into formatted JSON
EXIF Metadata Remover & Inspector
Inspect embedded camera and GPS metadata from photos and strip all privacy-sensitive tags client-side
SEO URL Slug Generator
Convert blog titles, headings, and product names into clean, readable, search-engine-friendly URL slugs
Mock Data (Faker) Generator
Generate customizable synthetic datasets with names, emails, addresses, companies, and timestamps
NanoID & Unique Key Generator
Generate collision-resistant, URL-friendly unique IDs using cryptographically secure Web Crypto random values
Credit Card & IBAN Test Generator
Generate Luhn-compliant test payment numbers and valid MOD-97 IBANs for test suite verification
Word Counter & Readability Analyzer
Calculate Flesch Reading Ease, grade level complexity, reading time, and comprehensive text metrics
Duplicate Line Remover & Sorter
Eliminate duplicate lines, clean whitespace, and sort lists alphabetically or naturally
String Obfuscator & Cipher
Transform text using ROT13, Caesar cipher, 8-bit binary, hexadecimal strings, Morse code, and leetspeak