Free Developer Tools

Useful browser-based utilities for developers, creators and everyday web tasks. Format, convert, encode, decode, test and optimize your data and code without installing software.

Updated: August 2026
Showing 19 developer tools

JSON Formatter

Format and beautify JSON data for easier reading, debugging and development.

Open Tool

Base64 Encoder / Decoder

Encode text into Base64 or decode Base64 data directly in your browser.

Open Tool

URL Encoder / Decoder

Encode or decode URL strings and special characters quickly and safely.

Open Tool

QR Code Generator

Create QR codes for URLs, text and other information directly from your browser.

Open Tool

Password Generator

Generate strong random passwords with customizable characters and security options.

Open Tool

Case Converter

Convert text between uppercase, lowercase, title case and other useful formats.

Open Tool

UUID Generator

Generate secure random UUID v4 identifiers individually or in bulk.

Open Tool

Unix Timestamp Converter

Convert Unix timestamps to readable dates and dates back to Unix timestamps.

Open Tool

JWT Decoder

Decode JWT headers and payloads, inspect timestamps and view token expiration information.

Open Tool

Regex Tester

Test regular expressions, highlight matches and inspect matched values instantly.

Open Tool

Hash Generator

Generate SHA-256, SHA-384 and SHA-512 cryptographic hashes instantly.

Open Tool

JSON to CSV Converter

Convert JSON arrays into CSV format and download the result instantly.

Open Tool

CSV to JSON Converter

Convert CSV data into formatted JSON and download the result instantly.

Open Tool

HTML Minifier

Minify HTML code by removing unnecessary whitespace and comments to reduce file size.

Open Tool

CSS Minifier

Minify CSS code by removing comments, whitespace and unnecessary characters.

Open Tool

JavaScript Minifier

Minify JavaScript code by removing comments and unnecessary whitespace to reduce file size.

Open Tool

SQL Formatter

Format messy SQL queries for easier reading or minify them into compact SQL.

Open Tool

JSON ↔ XML Converter

Convert JSON data to XML or XML data to JSON directly in your browser.

Open Tool

Markdown Previewer

Write Markdown and preview the formatted result instantly as you type.

Open Tool

No developer tool found

Try another search keyword.

Free Online Developer Tools

EasyTools365 provides browser-based utilities that can help with common development and web tasks. You can format JSON, encode Base64, process URLs, generate identifiers, inspect tokens, test regular expressions, create hashes, convert data and optimize code.

Developer Utilities for Everyday Web Work

These tools are designed for quick tasks where you may not want to install a separate desktop application. Open a tool, enter or paste your data, perform the operation and review the result directly in your browser.

Developer Tool Categories

Formatters
JSON, HTML and SQL formatting.
Converters
JSON, CSV, XML, URLs and timestamps.
Encoding
Base64 and URL encoding utilities.
Testing
Regex testing and data inspection.
Security Utilities
Passwords, hashes, UUIDs and JWT inspection.
Optimization
HTML, CSS and JavaScript minifiers.

How to Use These Tools

  1. Choose the developer tool that matches your task.
  2. Enter or paste the required data.
  3. Review the generated or converted result.
  4. Copy or download the result when the tool provides that option.
  5. For sensitive information, avoid entering data into tools unless you understand how the page processes it.

More EasyTools365 Tools