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Cosmovex

// Developer Tools

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DevBuddy: Offline Dev Toolkit

Developer Toolsby Cosmovex

Your pocket developer toolkit.

A comprehensive suite of offline-first developer utilities. JSON formatter, regex tester, base64 encoder, color picker, UUID generator, and 30+ tools every developer needs daily.

30+ ToolsOffline-FirstFast & LightweightNo Ads

About DevBuddy: Offline Dev Toolkit

DevBuddy is the Swiss Army knife for developers. It packs 30+ essential developer utilities into a single, fast, offline-first app. No internet required — every tool works instantly on your device. Format and validate JSON, test regular expressions with live highlighting, encode and decode Base64/URL/HTML, generate UUIDs, pick and convert colors between HEX/RGB/HSL, calculate hashes (MD5, SHA-1, SHA-256), convert between number systems, diff text, generate Lorem Ipsum, and much more. DevBuddy is designed for developers who need quick access to everyday tools without opening a browser or laptop. Clean dark UI, zero ads, zero tracking.

Screenshots

See it in action

DevBuddy: Offline Dev Toolkit screenshot 1DevBuddy: Offline Dev Toolkit screenshot 2DevBuddy: Offline Dev Toolkit screenshot 3DevBuddy: Offline Dev Toolkit screenshot 4DevBuddy: Offline Dev Toolkit screenshot 5DevBuddy: Offline Dev Toolkit screenshot 6
Features

Everything You Need

JSON Formatter & Validator

Paste any JSON and instantly format, minify, or validate it. Tree view for exploring nested structures. Copy formatted output with one tap.

Regex Tester

Write regular expressions and test them against sample text with live match highlighting. See capture groups, flags, and match counts in real-time.

Encoders & Decoders

Base64, URL encoding, HTML entities, JWT decoder, and more. Encode or decode any string instantly. Perfect for debugging API payloads.

Color Picker & Converter

Pick colors visually or convert between HEX, RGB, HSL, and HSV. Copy color values in any format. View color palettes and complementary colors.

Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text. Compare hashes to verify file integrity.

UUID & Random Generator

Generate UUID v4, random strings, passwords, and tokens. Customize length, character sets, and format. Bulk generation supported.

Ready to Try DevBuddy: Offline Dev Toolkit?

Free to download. No account required. Available on Android and iOS.

FAQ

Frequently Asked Questions

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