Free Online Utility Tools
QR codes, timers, timezone and timestamp conversion, and date calculations: the everyday utilities, each on its own page.
All Utility tools
About these tools
These are the tools you reach for once and need to work immediately: generating a QR code for a link or a poster, converting a Unix timestamp from a log into a readable date, working out what time a meeting falls in another timezone, or timing something precisely. The QR Code Generator produces codes for links, plain text and contact details, and the resulting image is generated in your browser so you can download it without an account or a watermark. The time tools cover the awkward cases properly: the Timezone Converter accounts for daylight saving rules rather than applying a fixed offset, and the Age Calculator returns an exact figure in years, months and days rather than a rounded year count.
Frequently asked questions
Do the QR codes expire?
No. The generator produces a standard static QR code that encodes your content directly, so it works forever. It is not a redirect through a tracking service that could be shut down or start charging.
Can I use these QR codes commercially?
Yes. The generated image is yours to use, including on printed materials, packaging and signage. There is no watermark and no attribution requirement.
How do I convert a Unix timestamp to a date?
Paste the timestamp into the Timestamp Converter. It handles both seconds and milliseconds and converts in both directions, between epoch values and human-readable dates.
Does the timezone converter handle daylight saving?
Yes. It uses the browser's IANA timezone database rather than fixed UTC offsets, so daylight saving transitions are applied correctly for the date you select.