Frequently Asked Questions

DevUtilHub is a free collection of 24+ online developer tools for encoding, decoding, hashing, formatting, and debugging. All tools run client-side in your browser for maximum privacy and speed.

Yes! All tools on DevUtilHub are 100% free to use with no hidden costs, premium tiers, or feature limitations. We're funded by respectful, non-intrusive ads that don't block tool functionality.

No. DevUtilHub requires zero sign-ups, no email verification, and no user accounts. Just visit the site and start using tools immediately.

Absolutely. All tools process data 100% client-side in your browser using JavaScript. Your data never leaves your device, is never sent to our servers, and is never stored. When you close the browser tab, all data is permanently deleted.

No. We do not collect, store, or transmit any data you enter into our tools. We don't track IP addresses, browsing behavior, or use analytics scripts. The only data stored locally is your dark mode preference via localStorage.

Our tools use modern JavaScript libraries that run entirely in your browser. For example, our Base64 encoder uses built-in browser APIs (btoa/atob), and our JSON formatter uses native JSON.parse(). No server processing is needed.

DevUtilHub works on all modern browsers including Chrome, Firefox, Safari, Edge, and Brave. We recommend using the latest browser version for best performance. Mobile browsers are fully supported.

Yes! All tools are fully responsive and optimized for mobile devices. You can use DevUtilHub on smartphones and tablets with the same functionality as desktop.

Enter your regular expression pattern (e.g., /pattern/flags) in the first field, then add test strings in the second field (one per line). Matching lines will be highlighted in real-time. You can copy results with the copy button.

Base64 encoding converts binary data into ASCII text format. It's commonly used for embedding images in HTML/CSS, sending binary data in JSON, encoding credentials for HTTP authentication, and email attachments.

No! Base64 is NOT encryption—it's just an encoding format. Anyone can decode Base64 strings. Never use Base64 to store passwords or sensitive data. Use proper encryption instead.

Use our JWT Debugger tool. Paste your JWT token into the input field, and it will automatically decode and display the header, payload, and signature. Remember: decoding is not verification. Do not trust unverified JWTs.

We support MD5, SHA-1, SHA-256, and SHA-512 hash generation. All hashing happens client-side in your browser using the Web Crypto API for security.

Yes! You can use DevUtilHub tools for personal projects, commercial work, client projects, and educational purposes—completely free.

We use Google AdSense to fund hosting, development, and maintenance costs. Ads are non-intrusive and never block tool functionality. We respect your experience while keeping all tools free.

We use minimal localStorage to save your dark mode preference. Google AdSense may use cookies for ad personalization. You can opt out of personalized ads via Google Ads Settings.

We love suggestions! Email us at [email protected] with your tool idea. We prioritize requests based on developer demand and feasibility.

Please report bugs to [email protected]. Include the tool name, browser version, and steps to reproduce. We typically fix critical bugs within 24-48 hours.

Currently, we don't offer embeddable widgets. However, you can link to specific tools. If you're interested in embedding, contact us at [email protected].

We add new tools regularly based on user feedback and keyword research. Follow us or check back monthly for new additions. Our goal is 50+ tools by end of 2025.