What is a Unix timestamp?
A Unix timestamp counts seconds (or milliseconds) since January 1, 1970 UTC. It’s widely used in APIs, databases, and logs because it’s simple to compare and store.
Unix Timestamp Converter
Convert between Unix epoch timestamps and human-readable dates in either direction.
How it works
- 1
Fill in the form fields the tool shows.
- 2
Change modes or toggles if available.
- 3
Copy the generated output when it looks right (often updates live).
Why use this tool
- Runs entirely in your browser — nothing is uploaded to a server.
- 100% free, no sign-up, no limits.
- Works in any modern browser — no app install, no extension, no account.
How to use Unix Timestamp Converter
Complete the fields in Unix Timestamp Converter. Output is produced in your browser from those inputs — copy it when ready.
Tips for better results
Empty optional fields if you want a minimal result. Invalid combinations should surface an error message.
Privacy and offline-friendly processing
Whenever possible, Unix Timestamp Converter processes your data locally with JavaScript in this page. That means drafts, secrets, and unfinished work stay on your device by default. Prefer this workflow when you do not want to upload sensitive text, tokens, passwords, or files to a third-party service.
Frequently asked questions
Seconds or milliseconds — how do I know which to use?
Toggle the milliseconds checkbox; most Unix systems use seconds, while JavaScript’s Date.now() uses milliseconds.
Can I get the current timestamp?
Yes, click "Now" to instantly fill in the current timestamp or date.
Is my data uploaded when I use this tool?
For most FlyUtils tools, no. Processing happens in your browser with JavaScript. If a tool ever needs a server, that will be stated clearly on the page.
Is Unix Timestamp Converter free to use?
Yes. Unix Timestamp Converter is free, with no sign-up and no artificial usage caps for normal personal and work use.
Does Unix Timestamp Converter work on mobile?
Yes. The page is mobile-first, so you can paste input, tweak options, and copy results from a phone or tablet.