About Dev Patrache

Dev Patrache is a free online developer toolkit operated by Patrache Studio. We provide a comprehensive collection of utilities that developers need in their daily workflow — all accessible directly in your browser. No sign-up required, no software to install. Just open the page and start working.

Our Mission

Every developer repeatedly performs routine tasks: formatting JSON, decoding Base64 strings, testing regular expressions, generating UUIDs, converting timestamps. These tasks should not require launching heavyweight desktop applications or visiting ad-laden websites that raise privacy concerns. Dev Patrache exists to provide fast, free, and privacy-respecting developer tools accessible to everyone. Whether you are a beginner writing your first lines of code or a senior engineer debugging production systems, our tools are here for you — regardless of your language or location.

Core Principles

• 100% Free: There are no hidden fees, no premium tiers, and no feature gates. Every single tool is fully available at no cost, and you never need to create an account.
• Browser-Based Processing: All data processing happens client-side in your browser. Nothing is sent to a server. This means zero network latency for tool operations, and many tools work offline once the page is cached.
• Privacy First: Your data never leaves your browser. We do not track, log, or store the content you process with our tools. You can safely handle code snippets, API keys, personal text, and any other sensitive information.
• Fast Loading: Built with static site generation (SSG), Dev Patrache loads instantly from CDN edge nodes worldwide. No server-side rendering delays, no spinner screens.
• 20 Languages: We support Korean, English, Japanese, Chinese (Simplified and Traditional), German, French, Spanish, Portuguese, Italian, Dutch, Swedish, Polish, Russian, Turkish, Arabic, Hindi, Indonesian, Vietnamese, and Thai — serving developers globally in their native language.
• Open and Transparent: We are upfront about how we operate, what data we collect (minimal analytics only), and how the site is sustained. No hidden agendas.

What We Offer

Dev Patrache provides over 90 tools across 12 categories, covering the most common developer needs.

• JSON Tools: Formatter, validator, tree viewer, JSON-to-YAML converter, and more for working with JSON data.
• Encoding/Decoding: Base64, URL encoding, HTML entities, JWT decoder, and other encoding format converters.
• Hash/Crypto: MD5, SHA-1, SHA-256, HMAC generators, and password hash verification tools.
• Text Tools: Text diff, character counter, Lorem Ipsum generator, case converter, and other text manipulation utilities.
• Regex/Code: Regex tester, code formatter, minifier/obfuscator, and syntax highlighter.
• Web/Network: HTTP status code reference, CORS tester, URL parser, and WebSocket testing tools.
• Generators: UUID, password, dummy data, QR code, and color palette generators.
• Converters: Unit converter, timestamp converter, number base converter, and color code converter.
• Image/Media: Image resizer, format converter, SVG editor, and favicon generator.
• Reference/Cheatsheets: HTTP status codes, MIME types, keyboard shortcuts, ASCII table, and other quick-reference materials.
• IP/DNS: My IP lookup, DNS lookup, WHOIS lookup, and subnet calculator.
• Other Utilities: Cron expression parser, Markdown previewer, environment variable parser, and more.

How We Sustain This Site

Dev Patrache is supported by non-intrusive Google AdSense advertisements. This advertising revenue allows us to keep every tool completely free for all users. We display only minimal ads that do not disrupt the user experience — no pop-ups, no interstitials, no autoplay video ads. All tools function normally even if you use an ad blocker.

Contact

If you have questions, suggestions, or want to report a bug, please visit our contact page. We also welcome requests for new tools or improvements to existing ones.