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Screenshots

  • Dev ToolBox screenshot 1
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About Dev ToolBox

Supercharge Your Development Workflow!

Say goodbye to bookmarking dozens of websites for simple formatting, encoding, or generating tasks. Dev ToolBox is the ultimate all-in-one utility app built for coders, testers, and designers.

Whether you need to quickly format JSON, decode a JWT, test a Regex pattern, or generate a UUID, this app brings over 35 essential developer tools straight to your pocket. The best part? It works 100% offline, meaning your data stays secure on your device and you get lightning-fast results without needing an internet connection.

🛠️ Included Tools & Utilities:

Formatters & Parsers

JSON Formatter: Beautify or minify JSON strings instantly.

SQL Formatter: Clean up complex SQL queries.

XML Formatter: Format and validate XML data.

YAML to JSON: Seamlessly convert YAML files into JSON format.

Encoders & Decoders

Base64 Encoder/Decoder: Safely encode or decode text and data.

URL Encoder/Decoder: Prepare URLs for safe web transmission.

HTML Entity Coder: Encode or decode HTML entities safely.

JWT Decoder: Inspect JSON Web Tokens without pasting them online.

Generators & Security

SHA Hash Generator: Generate secure SHA-1, SHA-256, SHA-512 hashes.

UUID Generator: Create unique version 4 UUIDs on the fly.

QR Generator: Convert text, links, or data into scannable QR codes.

Lorem Ipsum Generator: Generate placeholder text for your UI designs.

Web & Design Tools

Color Converter: Convert seamlessly between HEX, RGB, HSL, and more.

CSS Unit Converter: Translate PX to REM, EM, VW, and VH effortlessly.

Aspect Ratio Calculator: Calculate exact dimensions for images and video.

Case Converter: Switch text between camelCase, snake_case, PascalCase, etc.

Text & Code Utilities

Regex Tester: Test and debug your regular expressions in real-time.

Text Diff Checker: Compare two blocks of text or code to find changes.

Markdown Preview: Write and preview Markdown files instantly.

String Inspector: Count characters, words, bytes, and analyze text.

System & Time

Unix Timestamp: Convert epochs to human-readable dates and vice versa.

Cron Expression: Parse and understand complex cron schedules.

Base Converter: Convert numbers between binary, octal, decimal, and hex.

Display Info: Check your device's screen resolution, density, and refresh rate.

...plus 10+ more tools designed to make your daily coding tasks easier!

🔒 Why Choose Dev ToolBox?

100% Offline & Private: No server calls. Your code and data never leave your device.

Blazing Fast: Native performance means no waiting for web pages to load.

Lightweight: Packed with features but takes up minimal space on your phone.

No Distractions: A clean, developer-focused UI designed for getting things done.

Simplify your workflow and carry your essential tools wherever you go. Download Dev ToolBox today!

What’s new

Version 1.0.0 · Updated March 13, 2026

Dev tool box with 35+ offline tools.

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