Frequently Asked Questions
Find answers to common questions about CodeUtil developer tools
Is CodeUtil free to use?
Yes, all tools on CodeUtil are completely free with no limitations. No registration or payment required. Use JSON formatter, regex tester, Base64 encoder, and all other tools without any restrictions.
Is my data secure?
Absolutely. All processing happens entirely in your browser using JavaScript. Your data never leaves your device and is never sent to any server. This makes CodeUtil perfect for working with sensitive information.
Do the tools work offline?
Yes! Once the page is loaded, all tools work without an internet connection. The processing is done entirely in your browser using client-side JavaScript.
What is the JSON Formatter used for?
The JSON Formatter helps you format, validate, and beautify JSON data. It can fix common syntax errors, pretty-print minified JSON, and validate your JSON structure. Perfect for debugging APIs and configuration files.
How does the Regex Tester work?
The Regex Tester lets you test regular expressions against sample text with live highlighting. You can see matches in real-time, test different regex flags (global, multiline, case-insensitive), and get instant feedback on your patterns.
What encoding formats are supported?
CodeUtil supports multiple encoding formats: Base64 (text and files), URL encoding/decoding, HTML entity encoding, and more. Each tool handles both encoding and decoding operations.
How does the JWT Decoder work?
The JWT Decoder extracts and displays the header and payload of JSON Web Tokens. It does not verify signatures - it only decodes the token content. Never share real JWTs containing sensitive data.
What hash algorithms are available?
The Hash Generator supports MD5, SHA-1, SHA-256, and SHA-512 algorithms. You can hash text strings and compare hashes. Note: MD5 and SHA-1 are not recommended for security purposes.
How accurate is the Cron Generator?
The Cron Generator creates standard 5-field cron expressions (minute, hour, day, month, weekday). It includes a visual editor and shows the next execution times to verify your schedule is correct.
Can I convert between YAML and JSON?
Yes! The YAML/JSON converter can convert in both directions. It preserves data types and handles complex nested structures. Great for working with configuration files across different formats.
What is the Timestamp Converter for?
The Timestamp Converter converts Unix timestamps (seconds or milliseconds since epoch) to human-readable dates and vice versa. Supports multiple timezones and date formats.
Does CodeUtil support dark mode?
Yes! Click the moon/sun icon in the top right corner to toggle between light and dark themes. Your preference is automatically saved in your browser.
What browsers are supported?
CodeUtil works in all modern browsers - Chrome, Firefox, Safari, Edge, and their mobile versions. We recommend using the latest version of your browser for the best experience.
Can I use these tools on mobile?
Yes, all tools are fully responsive and work on mobile devices and tablets. The interface adapts to your screen size for comfortable use on any device.
Who maintains CodeUtil?
CodeUtil is developed and maintained by Sikulovi s.r.o. We regularly add new tools and improve existing ones based on user feedback.