💻Best Free Developer Tools
Essential tools for web developers: formatters, converters, generators, and validators.
16 tools
JSON Formatter
Format, validate, and beautify JSON data with syntax highlighting.
Base64 Encoder/Decoder
Encode text to Base64 or decode Base64 strings back to plain text.
URL Encoder/Decoder
Encode or decode URL components for safe use in web addresses.
Regex Tester
Test regular expressions with real-time matching and group highlighting.
CSS Minifier
Minify CSS code by removing whitespace, comments, and unnecessary characters.
JavaScript Minifier
Minify JavaScript code to reduce file size.
HTML Prettifier
Format and indent HTML code for better readability.
SQL Formatter
Format and beautify SQL queries with proper indentation.
Markdown Preview
Write Markdown and see the rendered preview in real-time.
JWT Decoder
Decode and inspect JSON Web Tokens without verification.
Cron Expression Parser
Parse and explain cron expressions in human-readable format.
CSV to JSON
Convert CSV data to JSON format and vice versa.
XML to JSON
Convert XML data to JSON format.
YAML to JSON
Convert between YAML and JSON formats.
User Agent Parser
Parse and analyze browser user agent strings.
JSON to TypeScript
Generate TypeScript interfaces from JSON data.
About This Collection
A curated collection of the most useful online developer tools for formatting code, converting data formats, generating boilerplate, and debugging. All tools run in your browser — no installation or signup required.