Developer Tools,
in your browser.
A growing collection of lightweight, privacy-first utilities for developers. No sign-ups, no server calls — just pure client-side magic.
All Tools
Browse our growing collection of developer utilities
Code Playground
7Run code directly in your browser. JavaScript, TypeScript, Python, PHP, SQL, HTML, and CSS supported.
JavaScript Playground
Run JavaScript code in your browser. Test and debug your code with instant console output.
CSS Playground
Write HTML and CSS with real-time preview. Experiment with styles instantly.
HTML Preview
Write full HTML documents with live preview. Supports inline CSS and JavaScript.
SQL Playground
Run full SQL in the browser with SQLite. Supports CREATE, INSERT, UPDATE, DELETE, SELECT, ALTER, DROP and more.
Python Playground
Run Python code in your browser using Pyodide. Execute scripts with standard library support.
TypeScript Playground
Run TypeScript code in your browser. Transpile to JavaScript and see console output instantly.
PHP Playground
Run PHP code in your browser using PHP-WASM. Execute scripts with core function support.
CSS Tools
8Generate CSS code visually. Gradients, shadows, flexbox, grid, and more.
Color Picker
Pick colors and convert between HEX, RGB, and HSL formats. Copy color values with one click.
CSS Glass Generator
Create beautiful glassmorphism effects with live preview. Adjust blur, opacity, border, and get ready-to-use CSS code.
Gradient Generator
Create beautiful CSS gradients with a visual editor. Linear, radial, and conic gradients supported.
Box Shadow Generator
Generate CSS box-shadow with live preview. Create layered shadows easily.
Border Radius Generator
Generate CSS border-radius with visual preview. Create complex rounded corners.
Flexbox Generator
Generate Flexbox CSS with interactive preview. Master flex layouts easily.
CSS Grid Generator
Generate CSS Grid layouts visually. Define rows, columns, and gaps with ease.
CSS Specificity Calculator
Calculate the specificity weight of CSS selectors to debug style conflicts.
Format Converters
14Convert data between different formats. JSON, YAML, CSV, HTML, Markdown, and more.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Supports seconds and milliseconds.
JSON to Markdown Table
Convert JSON data to clean Markdown tables instantly. Perfect for documentation and README files.
YAML ↔ JSON Converter
Convert between YAML and JSON formats instantly. Support for complex nested structures.
CSV ↔ JSON Converter
Convert CSV data to JSON and vice versa. Perfect for data migration and API integration.
HTML ↔ Markdown Converter
Convert between HTML and Markdown formats. Preserve formatting and structure.
Unit Converter
Convert between different units: length, weight, temperature, and more.
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal.
Text Case Transformer
Transform text between camelCase, PascalCase, snake_case, kebab-case, Title Case, and more.
Indentation Converter
Convert between tabs and spaces, or switch between 2-space and 4-space indentation.
Punycode Converter
Encode and decode internationalized domain names with Punycode.
JSON Path Extractor
Extract values from JSON using JSONPath-like expressions.
Time Zone Converter
Convert times between different world time zones instantly.
CSV to SQL Converter
Convert CSV data into SQL INSERT statements with schema inference.
JSON to TypeScript
Generate TypeScript interfaces from JSON data structures.
Encoders & Decoders
6Encode and decode text, URLs, images, and binary data.
Base64 Encode & Decode
Encode text to Base64 or decode Base64 back to text. Supports UTF-8 and URL-safe Base64.
URL Encode & Decode
Encode URLs with percent-encoding or decode encoded URLs back to readable text instantly.
HTML Encoder/Decoder
Encode special characters to HTML entities or decode HTML entities back to text.
Image to Base64
Convert images to Base64 encoded strings. Drag and drop, then copy the result.
HEX ↔ Binary Converter
Convert between hexadecimal and binary formats. Quick and accurate conversion.
Base64 to Image
Convert Base64 encoded strings back to images. Preview and download.
Security Tools
9Generate passwords, hashes, and parse security tokens.
JWT Parser
Decode and inspect JWT tokens. View header, payload, and signature details in a readable format.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text input. Fast, secure, and client-side.
Password Generator
Generate strong, secure random passwords. Customize length, character sets, and exclude ambiguous characters.
HMAC Generator
Generate HMAC signatures using SHA-1, SHA-256, SHA-384, or SHA-512 algorithms.
Password Strength Checker
Analyze password strength, entropy, and provide security recommendations.
JWT Token Generator
Generate JWT tokens with custom payloads, secrets, and algorithms.
AES Encrypt/Decrypt
Encrypt and decrypt text using AES with support for CBC, ECB, and CTR modes.
Bcrypt Hash Generator
Generate and verify bcrypt password hashes with configurable rounds.
Certificate Decoder
Decode X.509 and PEM certificates to view subject, issuer, validity, and public key info.
Code Optimization
3Minify, beautify, and format your code for production.
Code Minifier
Minify JavaScript, CSS, and HTML code. Reduce file size for production deployment.
Code Beautifier
Beautify and format JavaScript, CSS, and HTML code. Make code readable with proper indentation.
Image Optimizer
Compress and resize images in your browser. Support JPEG, PNG, and WebP formats.
Text Tools
13Manipulate and analyze text. Word count, sorting, case conversion, and more.
Markdown Preview
Write and preview Markdown in real-time. Support for GitHub Flavored Markdown.
Lorem Ipsum Generator
Generate placeholder text for your designs. Customize paragraphs, words, or sentences.
Word Counter
Count words, characters, sentences, and paragraphs. Get detailed text statistics.
Slug Generator
Convert text to URL-friendly slugs. Perfect for blog posts and page URLs.
Text Diff Checker
Compare two texts and highlight the differences. Side-by-side diff view.
Case Converter
Convert text between different cases: camelCase, snake_case, PascalCase, and more.
ASCII Art Generator
Convert text to ASCII art. Choose from various fonts and styles.
Text Reverser
Reverse text characters, words, or lines. Multiple reversal modes available.
Remove Line Breaks
Remove line breaks from text. Join paragraphs into a single line.
Text Sorter
Sort lines of text alphabetically or numerically. Ascending or descending order.
Remove Extra Spaces
Clean up text by removing extra spaces, blank lines, and tabs.
Duplicate Line Remover
Remove duplicate lines from text while preserving or sorting order.
Line & Character Counter
Count lines, characters, words, and bytes in your text instantly.
Dev Tools
5Essential developer tools. Regex testing, cron expressions, HTTP status codes, and more.
Regex Tester
Test and debug regular expressions with real-time matching, syntax highlighting, and explanation.
Cron Generator
Generate cron expressions easily with a visual builder. Get human-readable descriptions of your schedule.
HTTP Status Lookup
Look up HTTP status codes and their meanings. Quick reference for developers.
MIME Type Lookup
Search and lookup MIME types for file extensions. Quick reference for web developers.
URL Parser
Parse and decompose URLs into components: protocol, host, path, query, hash.
Design Tools
3Generate colors, palettes, and placeholder images for your designs.
Color Palette Generator
Generate beautiful color palettes for your designs. Export to various formats.
Placeholder Image Generator
Generate placeholder images for your designs. Customize size and colors.
Favicon Generator
Generate favicon images in multiple sizes from any image. Support custom padding and background.
Generators
11Generate UUIDs, QR codes, Lorem Ipsum, and slugs.
UUID Generator
Generate RFC 4122 compliant UUIDs (v4). Create single or bulk UUIDs with one click.
QR Code Generator
Create QR codes from any text or URL. Customize size and download as PNG image.
Barcode Generator
Generate barcodes in multiple formats including CODE128, EAN, UPC, and more.
JSON Schema Generator
Generate JSON Schema from sample JSON data for API validation.
Random Data Generator
Generate random mock data including names, emails, addresses, UUIDs, and passwords.
Meta Tags Generator
Generate HTML meta tags, Open Graph, and Twitter Card markup.
Robots.txt Generator
Generate robots.txt files to control web crawler access to your site.
XML Sitemap Generator
Generate XML sitemaps for search engine optimization.
Dockerfile Generator
Generate Dockerfiles interactively by selecting base images, ports, and commands.
Nginx Config Generator
Generate Nginx server configuration blocks for reverse proxy, SSL, and more.
.htaccess Generator
Generate Apache .htaccess rules for redirects, password protection, and caching.
Validation
2Validate emails, URLs, and other data formats.
Reference
2Quick reference tables for ASCII characters and other technical data.
JSON Tools
2Work with JSON data. Formatting, validation, and conversion.
XML Tools
2Format, validate, and work with XML documents.