iToolz

Developer Tools

Essential tools for developers — format, encode, decode, and test

12 tools available

JSON Formatter

Format, validate, and beautify JSON data with syntax highlighting, error detection, and tree view

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HTML Encoder/Decoder

Encode and decode HTML entities, special characters, and Unicode symbols for safe web content

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URL Encoder/Decoder

Encode and decode URLs and query parameters for safe transmission in web applications and APIs

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Base64 Encoder/Decoder

Encode and decode text or binary data in Base64 format for embedding images, APIs, and data transfer

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JWT Decoder

Decode and inspect JSON Web Token headers, payloads, and signatures with expiration time validation

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Regex Tester

Test, debug, and validate regular expressions with real-time matching, group highlighting, and flag support

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CSS Minifier

Minify CSS code to reduce file size and improve page load performance with compression statistics

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JavaScript Minifier

Minify and compress JavaScript code for production deployment with size reduction reporting

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HTML Beautifier

Format and auto-indent messy HTML code into clean, readable markup with configurable indentation

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Markdown Previewer

Write Markdown in a live editor and preview the rendered HTML output with full syntax support

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Color Picker

Pick any color from a visual palette and get instant HEX, RGB, and HSL values ready to copy

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Code Diff Tool

Compare two code snippets side by side with syntax-aware diffing and color-coded change highlighting

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About Developer Tools

iToolz offers 12 free developer tools that run entirely in your browser. No sign-up, no data collection, no limits. Every tool is instant and works on any device — desktop, tablet, or mobile.

Available Tools

  • JSON Formatter — Format, validate, and beautify JSON data with syntax highlighting, error detection, and tree view
  • HTML Encoder/Decoder — Encode and decode HTML entities, special characters, and Unicode symbols for safe web content
  • URL Encoder/Decoder — Encode and decode URLs and query parameters for safe transmission in web applications and APIs
  • Base64 Encoder/Decoder — Encode and decode text or binary data in Base64 format for embedding images, APIs, and data transfer
  • JWT Decoder — Decode and inspect JSON Web Token headers, payloads, and signatures with expiration time validation
  • Regex Tester — Test, debug, and validate regular expressions with real-time matching, group highlighting, and flag support
  • CSS Minifier — Minify CSS code to reduce file size and improve page load performance with compression statistics
  • JavaScript Minifier — Minify and compress JavaScript code for production deployment with size reduction reporting
  • HTML Beautifier — Format and auto-indent messy HTML code into clean, readable markup with configurable indentation
  • Markdown Previewer — Write Markdown in a live editor and preview the rendered HTML output with full syntax support
  • Color Picker — Pick any color from a visual palette and get instant HEX, RGB, and HSL values ready to copy
  • Code Diff Tool — Compare two code snippets side by side with syntax-aware diffing and color-coded change highlighting