Developer Tools

Formatters, encoders, and web utilities.

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JSON Formatter

Beautify, validate, and minify massive JSON strings instantly.

SQL Runner

Execute SQLite queries entirely in your browser using WebAssembly.

JWT Decoder

Decode JSON Web Tokens instantly and view claims in clear JSON format.

Regex Tester

Real-time regular expression matching with visual highlighting.
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Base64 & Hashing

Encode/decode Base64 and generate MD5 or SHA-256 hashes.

Markdown Editor

Live-preview Markdown editor with syntax highlighting.

Diff Checker

Compare two text files side-by-side to easily spot additions and removals.

Project Diff Checker

Compare entire directories to find added, removed, and modified files.

HTML5 Templates

Generate well-commented HTML5 boilerplate code for various webpage layouts instantly.

Free Online Developer Tools & Utilities

Welcome to the MessyTools Developer Hub. Whether you are debugging an API response, writing complex regular expressions, or comparing code versions, our suite of free online developer tools is here to streamline your workflow.

Essential Web Development Utilities

We understand that modern software development requires quick, accessible tools. That's why we've built a curated collection of utilities that run entirely in your browser:

  • JSON Formatter & Validator: Paste messy, unreadable JSON and instantly format it into a beautifully indented, readable structure.
  • SQL Online Runner: Execute SQLite queries, create tables, and manipulate data using a WebAssembly database engine right in your browser.
  • JWT Decoder: Instantly decode JSON Web Tokens into readable JSON to inspect header algorithms and payload claims directly in your browser.
  • Regex Tester: Write and test regular expressions in real-time with syntax highlighting and instant match feedback.
  • Diff Checkers: Compare text files, code snippets, or entire project structures to easily spot additions, deletions, and modifications.
  • HTML5 Template Generator: Instantly generate well-commented HTML5 starter templates for various webpage layouts.

    • Fast, Secure, and Private

    When you are working with sensitive code or proprietary data, security is paramount. Unlike server-based tools that transmit your data over the internet, the tools in our Developer Hub execute client-side. Your code never leaves your machine, ensuring complete privacy and maximum speed.

    Read our Blogpost