Developer Tools
Essential developer utilities right in your browser. JSON formatter, regex tester, Base64 encoder, JWT decoder, code minifier, and more.
17 tools available
JSON Formatter
Format, prettify, and validate JSON data with syntax highlighting and error detection.
JSON Validator
Validate JSON syntax and structure. Instantly identify and locate JSON errors.
Regex Tester
Test and debug regular expressions with live matching, flags, and match highlighting.
Code Minifier
Minify JavaScript, CSS, and HTML code to reduce file size and improve load times.
CSS Minifier
Minify CSS stylesheets by removing comments, whitespace, and redundant code to reduce file size.
JavaScript Minifier
Minify JavaScript code by removing comments and whitespace to reduce file size.
HTML Minifier
Minify HTML by removing comments, collapsing whitespace, and stripping optional tags.
Code Beautifier
Beautify and format JavaScript, CSS, HTML, and more with customizable indent settings.
HTML to JSX
Convert HTML markup to valid JSX syntax for React components automatically.
SQL Formatter
Format and beautify SQL queries with proper indentation and keyword capitalization.
Cron Expression Parser
Parse and explain cron expressions in plain English with next execution times.
JWT Decoder
Decode and inspect JSON Web Tokens — view header, payload, and verify signatures.
Base64 Encoder/Decoder
Encode and decode Base64 strings. Supports text, URLs, and file encoding.
URL Encoder/Decoder
Encode and decode URLs and query strings for safe transmission and parsing.
Diff Viewer
View side-by-side code diffs with syntax highlighting for any programming language.
HTML Encoder/Decoder
Encode and decode HTML entities to safely display code and special characters in web pages.
Markdown Preview
Write and preview Markdown with GitHub Flavored Markdown support including tables, code blocks, and task lists.