Dev Toolkit: JSON, API & Regex

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About this app

Developer Toolkit is a fast, lightweight collection of essential developer tools built for programmers, engineers, testers, and DevOps professionals.

Instead of installing multiple utilities, access powerful developer tools like JSON formatter, API tester, JWT decoder, timestamp converter, UUID generator, hash generator, regex tester, Base64 encoder, and URL encoder in one convenient app.

Perfect for Android developers, backend engineers, web developers, QA testers, and DevOps teams.

TOOLS INCLUDED

API Tester (REST API Client)

Send HTTP requests and test REST APIs directly from your phone.

• GET, POST, PUT, PATCH, DELETE requests
• Add headers and query parameters
• JSON request body support
• Pretty formatted API responses

Perfect for testing REST APIs and debugging backend endpoints.

JSON Formatter & Validator

Format, validate, and beautify JSON instantly.

• Beautify JSON for readability
• Minify JSON for compact output
• Syntax highlighting
• Copy formatted output

Great for debugging API responses and working with JSON data.

JWT Decoder

Decode JWT (JSON Web Token) tokens quickly.

• Decode JWT header and payload
• Pretty formatted JSON output
• View token time information
• Copy decoded values instantly

Useful for developers working with authentication systems such as OAuth, Firebase Auth, and API tokens.

Timestamp Converter (Unix / Epoch Time)

Convert Unix timestamps and epoch time instantly.

• Convert Unix timestamp to readable date and time
• Convert date and time to Unix timestamp
• Automatic seconds and milliseconds detection
• View UTC time and local time
• Relative time display (e.g. “5 minutes ago”)
• Copy results quickly

Perfect for debugging logs, APIs, and backend systems.

UUID Generator (GUID Generator)

Generate random UUIDs for testing and development.

• Generate UUID v4 instantly
• Batch UUID generation
• Uppercase and no-hyphen options
• Copy single UUID or copy all generated values

Useful for database IDs, API testing, and backend development.

Hash Generator

Generate cryptographic hashes instantly.

Supported algorithms:

• MD5
• SHA-1
• SHA-256
• SHA-512

Features:

• Instant hash generation
• Copy hash values quickly
• Useful for verifying data integrity and debugging APIs

Regex Tester

Test regular expressions quickly and easily.

• Live regex match highlighting
• Pattern validation
• Fast regex testing

Ideal for developers working with text parsing, data extraction, and validation.

Base64 Encoder / Decoder

Encode or decode Base64 data instantly.

• Fast Base64 text encoding
• Decode Base64 strings
• Copy results with one tap

Useful when working with API payloads, authentication headers, and encoded data.

URL Encoder / Decoder

Encode or decode URLs and query parameters easily.

• Full URL encoding and decoding
• Query parameter encoding
• Copy results instantly

Helpful for debugging query strings and API requests.

FEATURES

• Lightweight and fast developer tools
• Clean developer-friendly interface
• Instant copy and share results
• Most tools work offline
• Designed for productivity and quick debugging

PERFECT FOR

• Software developers
• Backend engineers
• Android developers
• Web developers
• DevOps engineers
• QA testers
• Students learning APIs and programming

Stop switching between multiple apps and keep all essential developer utilities in one powerful toolkit.

What’s new

🚀 New Developer Tools Added

This update brings three powerful utilities for developers:

• ⏱ Timestamp Converter – Convert Unix timestamps to readable dates and back
• 🆔 UUID Generator – Generate random UUIDs or GUIDs instantly
• 🔐 Hash Generator – Generate MD5, SHA-1, SHA-256 and SHA-512 hashes

Also includes:
• Relative time support in Timestamp Converter
• Batch UUID generation with copy-all support
• Improved performance and UI polish

More developer tools coming soon!