Dev ToolBox
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The ultimate offline developer multitool: 35+ fast coding & debugging utilities
- Downloads
- 28+
- on Google Play
- Price
- Free
- No in-app purchases
- Updated
- Mar 13
- 2026 · v1.0.0
Screenshots
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!
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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