Developer Tools
Free Online Developer Tools
Discover a collection of browser-based developer tools for working with JSON, CSV, Base64, URLs, regular expressions, CSS, and more. Convert data formats, test regex patterns, generate gradients, decode tokens, and format code instantly. All tools run locally in your browser with no uploads required.
Popular tools
JSON Formatter & Validator
Validate, format, and minify JSON instantly with live syntax feedback.
JWT Decoder
Decode JWT tokens instantly and inspect headers, payload claims, and expiration with a secure browser-based JWT decoder.
RegEx Tester
Test and debug regular expressions instantly with live match highlighting and capture group inspection.
UUID Generator
Generate random v4, time-based v1, and modern sortable v7 UUIDs instantly. Customize formatting, generate in bulk, and use them securely for database keys.
Hash Generator
Generate secure cryptographic hashes (MD5, SHA-1, SHA-256, SHA-384, SHA-512) instantly. Secure, fast, and entirely client-side for maximum privacy.
CSV to JSON Converter
Convert CSV data into JSON arrays or objects instantly with header support and customizable delimiters.
CSS Gradient Generator
Create linear and radial CSS gradients instantly with live preview and copy-ready background CSS code.
Data & API
Format, validate, and decode common data formats.
JSON Formatter & Validator
Validate, format, and minify JSON instantly with live syntax feedback.
JWT Decoder
Decode JWT tokens instantly and inspect headers, payload claims, and expiration with a secure browser-based JWT decoder.
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 strings instantly with a secure browser-based encoder and decoder.
URL Encoder / Decoder
Encode or decode URLs and query parameters instantly using a secure browser-based URL encoder and decoder.
RegEx & Text
Test patterns and transform text quickly.
RegEx Tester
Test and debug regular expressions instantly with live match highlighting and capture group inspection.
Case Converter
Convert text between camelCase, snake_case, PascalCase, kebab-case, uppercase, and lowercase instantly.
Duplicate Line Remover
Instantly remove duplicate lines from lists or text. Advanced options for case-sensitivity, whitespace trimming, and ignoring empty lines. 100% secure.
Conversion
Convert between developer-friendly formats.
Frontend / CSS
Generate UI-ready CSS snippets and effects.
CSS Box Shadow Generator
Generate complex, layered CSS box shadows visually with our intuitive builder. Copy clean CSS and Tailwind code instantly for your web projects.
CSS Grid Generator
Design complex CSS grid layouts visually. Adjust columns, rows, and gaps, then copy clean CSS or Tailwind code instantly for your web projects.
CSS Flexbox Playground
Interactive CSS flexbox generator. Visually adjust flex direction, alignment, and gap, then copy clean CSS or Tailwind code instantly.
CSS Gradient Generator
Create linear and radial CSS gradients instantly with live preview and copy-ready background CSS code.
Glassmorphism Generator
Generate frosted glass UI panels with adjustable blur, transparency, and borders. Copy ready-to-use glassmorphism CSS instantly.
Assets
Convert and generate assets for web projects.
Hashing & Security
Generate secure hashes, passwords, and identifiers.
UUID Generator
Generate random v4, time-based v1, and modern sortable v7 UUIDs instantly. Customize formatting, generate in bulk, and use them securely for database keys.
Hash Generator
Generate secure cryptographic hashes (MD5, SHA-1, SHA-256, SHA-384, SHA-512) instantly. Secure, fast, and entirely client-side for maximum privacy.