Date & time tools
A clock worth leaving on screen, plus the date and timestamp maths you occasionally need. Nothing to install.
1 free tool · no sign-up · nothing uploaded
A clock you can actually leave running
The full-screen clock exists because the good desktop options are downloads, and the good web options are covered in advertising. This one is neither: open it, press full screen, and the controls fade away.
It offers the classic split-flap flip cards or plain glowing digits, six themes, sixteen time zones, and — where the browser allows it — a screen wake lock so the display does not dim halfway through a meeting.
Settings are remembered in your browser, so the second time you open it, it is already the clock you wanted.
The rest of the time tools
The Unix Timestamp Converter turns epoch numbers into readable dates and back, detecting seconds versus milliseconds automatically.
The Age Calculator does exact calendar arithmetic — real month lengths and leap years, not a 30-day approximation — which is also the fastest way to count the days between two dates.
Frequently asked questions
Is the clock accurate?
It reads your device's clock, so it is exactly as accurate as your computer. Time zone conversion uses the browser's own IANA database, which stays current with system updates.
Will my screen dim while the clock is showing?
Not while the browser grants a screen wake lock, which most current desktop browsers do in full screen. A small note appears on screen when the lock is active.
Does it work offline?
Yes. Once the page has loaded there is nothing further to fetch, so the clock keeps running with no connection.
Do I need to install anything?
No. It is a web page — no download, no extension, no account.