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Developer Tools

Free developer tools online — JSON formatter & validator, Base64 encoder/decoder, JWT decoder, regex tester, SQL formatter, CSV/YAML/XML converters and 20+ more coding utilities.

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JSON Formatter & Validator Online

Format, validate and beautify JSON data online

Base64 Encoder & Decoder

Encode and decode Base64 strings online

JWT Decoder

Decode and inspect JWT tokens online

Regex Tester with Explanation

Test regex patterns with real-time matching and explanations

UUID Generator Online

Generate random UUID v4 identifiers online

URL Encoder & Decoder

Encode and decode URL strings online

HTML Entity Encoder & Decoder

Encode and decode HTML entities online

CSS Minifier

Minify CSS code to reduce file size

JavaScript Minifier

Minify JavaScript code to reduce file size

SQL Formatter & Beautifier

Format and beautify SQL queries online

Cron Expression Parser

Parse cron expressions into human-readable text

HTML Formatter

Beautify and indent HTML code

JSON to YAML Converter

Convert JSON data to YAML format

YAML to JSON Converter

Convert YAML data to JSON format

XML Formatter

Beautify and indent XML documents

HTTP Status Codes Reference

Searchable HTTP status code reference

ASCII / Unicode Table

Interactive ASCII and character code reference

CSV to JSON Converter

Convert CSV data to JSON array

JSON to CSV Converter

Convert JSON array to CSV format

Markdown to HTML Converter

Convert Markdown to HTML with preview

Chmod Calculator

Calculate Unix file permissions

Placeholder Image Generator

Generate custom SVG placeholder images

Code Snippet Generator

Generate common code snippets and boilerplate