Free Online Developer Tools for Formatting, Encoding & Debugging
Format JSON, XML, and SQL queries, encode or decode Base64 strings, inspect JWT tokens, and generate UUIDs — all directly in your browser. These developer tools are built for quick debugging, API testing, and everyday coding tasks without installing extra software.
JSON Formatter & Validator
Format and validate JSON data instantly to improve readability and catch syntax errors while debugging APIs or configuration files.
Try now →XML Formatter
Clean up and structure XML code for better readability. Useful when working with feeds, APIs, or configuration files.
Try now →SQL Formatter
Format messy SQL queries into structured, readable statements to simplify debugging and query optimization.
Try now →Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 strings instantly for data transfer, APIs, and secure content handling.
Try now →JWT Decoder
Decode and inspect JSON Web Tokens (JWT) to view headers and payload details safely in your browser.
Try now →UUID Generator
Generate UUID v1 and v4 values instantly for databases, APIs, and distributed systems.
Try now →IP Address Lookup
Check IP address location, ISP, hostname, and geolocation details instantly using this online IP lookup tool.
Try now →SSL Checker
Verify SSL certificate validity, expiration date, and security details of any domain instantly.
Try now →DNS Lookup Tool
Perform DNS lookup to check A, AAAA, MX, TXT, NS, and CNAME records for any domain.
Try now →Timestamp Converter (Unix ↔ Human)
Convert Unix timestamps to human-readable dates and convert dates back to Unix time instantly.
Try now →HTML Formatter
Beautify and format HTML code for better readability and easier debugging of markup structures.
Try now →JSON Escape / Unescape
Escape or unescape JSON strings instantly for safe API transmission and debugging.
Try now →JSON to CSV Converter
Convert JSON data into CSV format instantly for spreadsheets, data analysis, and exports.
Try now →CSV to JSON Converter
Convert CSV files into structured JSON format for APIs, databases, and development workflows.
Try now →