Frequently Asked Questions
Find answers to common questions about DevNestTools and our free online tools.
Are all the tools on DevNestTools really free?
Yes. Every tool is completely free with no hidden costs, premium tiers, or usage limits.
Do I need to create an account to use the tools?
No. Every tool works instantly without signup or registration.
Can I use these tools on mobile?
Yes. All tools are fully responsive and work seamlessly on phones, tablets, laptops, and desktop computers.
Why don't some tools work offline?
Most tools work entirely offline after the page loads because all processing happens in your browser. The IP Lookup tool is the only exception, as retrieving your public IP requires an internet connection.
How do I report a bug or request a new tool?
Visit our Contact page to report bugs, suggest improvements, or request new tools. We welcome your feedback.
Is my data safe when I use these tools?
Yes. Almost all processing happens locally in your browser, meaning your files and data are never uploaded to a server. The only exception is the IP Lookup tool, which must make a network request to retrieve public IP information.
Do you show ads on this site?
Yes. DevNestTools uses Google AdSense to support the site. See our Disclosure and Privacy Policy pages for more information.
Does the JSON Beautifier validate my JSON or just format it?
Both. It formats JSON into a readable structure and validates the syntax, highlighting errors and indicating where problems occur.
Is it safe to paste sensitive JSON into the tool?
Yes. Formatting and validation happen entirely in your browser, so your JSON data is never uploaded or stored on a server.
Does minifying my code change how it runs?
No. Minification removes whitespace, comments, and unnecessary characters while preserving the original functionality of your code.
Can I un-minify code back to a readable format?
Yes. The beautify option reformats minified code into a readable layout, although original comments and formatting cannot be restored.
Will compressing my image reduce visible quality?
At moderate compression levels, image quality remains virtually unchanged. Any noticeable differences usually appear only when zooming in closely or printing.
Which image formats are supported?
The Image Compressor supports JPG, PNG, and WebP image formats.
When should I use Base64 instead of a regular image file?
Base64 is ideal for small icons or logos embedded directly into HTML or CSS to reduce HTTP requests. It is not recommended for large images because Base64 increases file size by around 33%.
Do the QR codes expire?
No. QR codes generated by this tool are static, meaning they permanently contain your encoded data and do not expire.
What can I encode into a QR code?
You can generate QR codes for URLs, plain text, email addresses, phone numbers, SMS messages, and Wi-Fi credentials.
Why does the tool show some information as "Unavailable"?
Modern browsers intentionally restrict access to certain hardware and system details for privacy and anti-fingerprinting purposes. This is a browser limitation rather than a problem with the tool.
Why is my IP location only approximate?
IP geolocation databases estimate your location based on your internet provider's IP address. They generally identify your city or region, not your precise physical location.