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Free Browser-Based Developer Tools
Privacy-first tools that run entirely in your browser. No uploads, no tracking, no signup required.
Most Popular Tools
Our most-used privacy-first developer tools
JSON Formatter & Validator
Format, validate, and minify JSON data instantly in your browser.
Base64 Encode / Decode
Encode text to Base64 or decode Base64 strings instantly in your browser.
PDF Merge
Combine multiple PDF files into one document
UUID Generator
Generate random UUIDs (v4) instantly in your browser.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes in your browser.
Formatters
JSON Formatter & Validator
Format, validate, and minify JSON data instantly in your browser.
SQL Formatter
Format and beautify SQL queries with proper indentation
HTML Formatter
Format and beautify HTML code online
XML Formatter & Validator
Format, validate, and minify XML with syntax highlighting and error detection.
JavaScript Formatter & Minifier
Format and minify JavaScript code online
CSS & JS Minifier & Beautifier
Minify or beautify CSS/JavaScript code - compress for production or format for readability
HTML Live Preview
Real-time HTML code renderer with instant visual preview
Encoders & Decoders
Base64 Encode / Decode
Encode text to Base64 or decode Base64 strings instantly in your browser.
URL Encode / Decode
Encode or decode URL components instantly in your browser.
JWT Decoder
Decode and inspect JWT tokens and bearer tokens online. View header, payload, signature, and expiration status.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes in your browser.
HTML Entity Encoder & Decoder
Encode and decode HTML entities in real time
GZIP Compress/Decompress
Compress and decompress GZIP files online
Generators
UUID Generator
Generate random UUIDs (v4) instantly in your browser.
QR Code Generator
Generate QR codes for URLs, text, or any data instantly in your browser.
Favicon Generator
Generate favicons from text or emoji in multiple sizes with customizable colors and styles.
Mock Data Generator
Generate realistic fake data for testing and development
Cron Expression Builder
Build and validate cron expressions with a visual editor
Password Generator
Generate secure, random passwords instantly in your browser.
Lorem Ipsum Generator
Generate placeholder text for your designs and layouts.
Placeholder Image Generator
Generate placeholder images with custom size, color, text, and format. Download as PNG, WebP, or SVG.
Robots.txt Generator
Generate robots.txt file to control search engine crawler access
Meta Tags Generator
Generate HTML meta tags and Open Graph tags with live social media preview
CSS Gradient Generator
Generate beautiful CSS gradients with live preview. Linear, radial, and conic gradients.
Markdown Table Generator
Create and edit Markdown tables with WYSIWYG interface. Export instantly.
Converters
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates instantly.
Color Converter
Convert colors between HEX, RGB, HSL, and other formats instantly.
YAML / JSON / TOML Converter
Convert between YAML, JSON, and TOML config formats
JSON to CSV Converter
Convert JSON data to CSV format online
CSV to JSON Converter
Convert CSV data to JSON format online
Number Base Converter
Convert numbers between Binary, Octal, Decimal, and Hexadecimal instantly.
Markdown to HTML Converter
Convert Markdown to HTML in real time with live preview and source code view.
HTML to Markdown Converter
Convert HTML to clean Markdown format with support for tables, code blocks, and links.
SVG to PNG Converter
Convert SVG to PNG with custom resolution and scaling
Hex to Text Converter
Convert between hexadecimal, binary, ASCII and text formats
Text Tools
Diff Checker
Compare two texts and highlight the differences line by line.
Markdown Preview
Write Markdown and preview the rendered HTML output in real-time.
Regex Tester
Test and debug regular expressions with live matching
Text Case Converter
Convert text to different case formats online
Word Counter
Count words, characters, sentences, and paragraphs
JSON Diff Checker
Compare two JSON objects and visualize differences. Semantic JSON comparison.
Data Tools
Image Tools
Image Format Converter
Convert images between PNG, JPEG, and WebP formats in your browser.
Image Compressor
Compress images to reduce file size while maintaining visual quality.
Image to PDF Converter
Convert images to PDF documents right in your browser.
Image to Base64 Encoder
Convert images to Base64 data URI or plain Base64 string
SVG Optimizer
Optimize and compress SVG files by removing unnecessary code and metadata