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Free Online Developer Tools

Free online developer tools for working with structured data, code snippets, encoding, decoding, formatting, and validation. Use these browser-based utilities to clean JSON, check XML, convert data formats, test strings, and speed up everyday development tasks.

All subcategories

Formatters Encoders & Decoders Data Converters Validators & Testers Generators

Tools

JSON Formatter Format, beautify, minify, and validate JSON for APIs, config files, and debugging. Base64 Encoder Decoder Encode text to Base64 and decode Base64 back to readable text. URL Encoder Decoder Encode or decode URLs, query strings, and special characters. UUID Generator UUID Generator for quick browser-based results. HTML Entity Encoder / Decoder HTML Entity Encoder / Decoder for quick browser-based results. JSON String Escape / Unescape JSON String Escape / Unescape for quick browser-based results. CSV to JSON Converter Convert CSV rows into JSON for development, data cleanup, and testing. JSON to CSV Converter Convert JSON arrays or objects into CSV text for spreadsheets and data exchange. Regex Tester Test a regular expression against sample text and review matches. HTML Beautifier HTML Beautifier for quick browser-based results. CSS Beautifier CSS Beautifier for quick browser-based results. Javascript Minifier Beautifier Javascript Minifier Beautifier for quick browser-based results. SQL Formatter SQL Formatter for quick browser-based results. XML Validator Validate XML syntax and find common parsing errors. XML to JSON Converter XML to JSON Converter for quick browser-based results. Unix Permission Calculator Unix Permission Calculator for quick browser-based results. Cron Job Generator Cron Job Generator for quick browser-based results.

Why use this tool?

  • Format and validate common data formats
  • Save time on small debugging and cleanup tasks
  • Use tools directly in the browser
  • Quickly copy results for development workflows
  • Access JSON, XML, encoding, and conversion tools together

Common use cases

  • Formatting JSON API responses
  • Checking XML syntax before saving a file
  • Encoding or decoding text for URLs and data transfer
  • Cleaning structured data during debugging
  • Preparing snippets for documentation or testing

Related searches

free online developer tools JSON formatter XML validator online code tools data converter online developer utilities

FAQ

What developer tools are available here? +

This category groups JSON, XML, encoding, decoding, formatting, conversion, validation, and generator tools for everyday development work.

Can I format JSON and validate XML? +

Yes. You can use dedicated JSON formatting tools and XML validation tools from this category.

Are these tools suitable for private code? +

Many tools run in the browser, but you should still avoid pasting highly sensitive secrets into any web page unless you have reviewed the tool behavior.

Do I need to install anything? +

No. These are browser-based utilities for quick tasks and small debugging workflows.

Are the tools full replacements for an IDE? +

No. They are lightweight helpers for formatting, checking, converting, and testing snippets, not full development environments.