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Everyone
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About this app

DevBox is the ultimate productivity companion for software engineers and developers. Tired of searching for web-based tools that might compromise your data? DevBox provides a suite of essential utilities that work 100% offline, ensuring your code and tokens stay private on your device.

Key Features:

JSON Formatter: Instantly beautify, minify, and validate messy JSON strings with syntax highlighting.

UUID/GUID Generator: Generate multiple versions of random UUIDs in bulk with one tap.

Base64 Encoder/Decoder: Convert text or strings to Base64 format and back instantly.

JWT Decoder: Inspect and debug JSON Web Tokens. View Header and Payload without sending data to any server.

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

URL Encoder/Decoder: Safely handle URL components and special characters.

Base Converter: Real-time conversion between Hex, Decimal, Octal, and Binary.

Why choose DevBox?

Privacy First: No data ever leaves your device. Perfect for handling sensitive production logs or tokens.

Dark Mode Optimized: Designed by developers for developers, with a clean, high-contrast interface.

Fast & Lightweight: No splash screens or ads to slow you down.

Multi-Language Support: Available in English and Chinese.

Stop switching tabs and stay in the flow. Download DevBox and keep your essential tools right at your fingertips!

DevBox is a powerful productivity toolset designed for software engineers. Say goodbye to online conversion websites that require an internet connection and may even leak sensitive data. DevBox provides a suite of commonly used tools that run entirely offline, ensuring your code, tokens, and data privacy always remain on your local device.

Core Features:

JSON Formatting: One-click beautification, compression, and validation of JSON code, with syntax highlighting support.

UUID Generator: Batch generate random UUIDs/GUIDs for various versions, supporting custom formats.

Base64 Encoding/Decoding: Quickly convert between text and Base64 format.

JWT Parser: Offline view of JSON Web Token headers and payloads, essential for debugging.

Timestamp Conversion: Convert between Unix timestamps and Beijing time (local time), supporting seconds/milliseconds.

URL Encoding/Decoding: Securely handle URL parameters and special characters, resolving garbled text issues.

Number System Conversion: Real-time simultaneous conversion between hexadecimal, decimal, octal, and binary.

Why Choose Developer Box?

Privacy and Security: All processing is completed locally, without requesting unnecessary permissions or uploading any data.

Minimalist and Efficient: Clean interface, no ad interference, instant startup.

Dark Mode: Deeply adapted for dark mode, comfortable for prolonged use.

Completely offline: Tools are always available, whether you're on a plane or on a local network.

Boost your development efficiency, starting now. Download the Developer Box today and take your toolbox with you!
Updated on
Apr 7, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection
Data is encrypted in transit

App support

About the developer
深圳市浮游鲲鹏网络技术有限公司
wuxiaodan1404@gmail.com
中国 广东省深圳市 福田区福田街道福山社区彩田路2010号中深花园B座2601-A67 邮政编码: 518000
+852 5544 0002

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