About DevToolBox

What is DevToolBox

DevToolBox is a free collection of online tools designed to streamline developers' daily tasks. You can easily perform common conversion and validation tasks like JSON formatting, character counting, Base64 encoding, URL encoding, and Unix timestamp conversion right in your browser.

Client-Side Processing

The most important feature of DevToolBox is that all processing runs entirely in your browser. Your input data is never sent to any server.

This means:

• Your data is never transmitted externally, so you can safely process data containing sensitive information
• After the page loads, tools work offline even with an unstable internet connection
• Processing is fast because no server roundtrip is needed

Simplicity and Usability

DevToolBox aims to provide only the essential features in a simple, straightforward way. The intuitive interface lets you start using tools immediately without disrupting your development workflow.

• No account registration required - just open the page and start using it
• Minimal ad placement - tool usability is the top priority
• Responsive design - works comfortably on PC, tablet, and smartphone
• Dark mode support - switch themes based on your preference or OS settings

Available Tools

Format & Beautify

• JSON Formatter - Format, minify, and validate JSON data
• SQL Formatter - Format SQL and capitalize keywords
• XML Formatter - Format, minify, and validate XML data
• Markdown Preview - Real-time Markdown preview

Encode & Decode

• Base64 Encode/Decode - Convert between text and Base64
• URL Encode/Decode - Encode and decode URL strings
• HTML Entity Converter - Encode and decode HTML special characters
• Image Base64 Converter - Convert between images and Base64 data URLs
• Escape Converter - Convert and restore backslash escapes

Text Processing

• Character Counter - Real-time character, line, and byte counting
• Regex Tester - Real-time regex pattern testing
• Diff Checker - Highlight differences between two texts
• Text Case Converter - Convert to camelCase, snake_case, etc.
• Lorem Ipsum Generator - Generate dummy text
• Slug Generator - Generate URL-friendly slugs

Data Conversion

• YAML-JSON Converter - Convert between YAML and JSON
• CSV-JSON Converter - Convert between CSV and JSON
• TOML-JSON Converter - Convert between TOML and JSON
• JSON to TypeScript - Generate TypeScript type definitions from JSON
• JSON Path Finder - JSON tree view and path queries

Converters

• Unix Timestamp Converter - Convert between timestamps and dates
• Color Converter - Convert between HEX, RGB, and HSL
• Number Base Converter - Convert between binary, octal, decimal, and hexadecimal
• Byte Converter - Convert between B, KB, MB, GB, TB, and PB

Generators

• Hash Generator - Generate MD5, SHA-1, SHA-256, and SHA-512 hashes
• UUID Generator - Generate UUID v4 (bulk generation supported)
• Password Generator - Generate secure passwords
• QR Code Generator - Generate QR codes from text or URLs

CSS & Design

• CSS Gradient Generator - Create linear and radial gradients
• Box Shadow Generator - Intuitive box-shadow configuration
• Flexbox Playground - Interactive Flexbox property manipulation
• Border Radius Generator - Configure border-radius

Developer Tools

• JWT Decoder - Decode and verify JWT tokens
• Cron Expression Parser - Parse cron expressions and show schedules
• Chmod Calculator - Calculate file permissions
• HTTP Status Codes - Status code reference
• .gitignore Generator - Generate .gitignore templates
• Meta Tag Generator - Generate SEO and OGP meta tags
• OGP Preview - Preview OGP settings

Contact

If you have any feedback or feature requests for DevToolBox, please let us know via the GitHub repository Issues. New tool requests are welcome.