Unix Timestamp Converter
Developer & DataConvert between Unix timestamps and human-readable dates.
Convert both ways between Unix time and a calendar date.
Unix timestamp → date
Enter a timestamp to convert.
Date → Unix timestamp
Pick a date and time to convert.
Unix time counts seconds since 1 January 1970 UTC (the epoch). All conversions run in your browser.
What is Unix Timestamp Converter?
Unix Timestamp Converter translates Unix time to and from human-readable dates, both ways. Type a timestamp to see the local time, UTC, ISO 8601, and a relative description, or pick a date and time to get the epoch value in seconds and milliseconds. It auto-detects whether your number is in seconds or milliseconds and includes a Now button for the current time. Everything runs in your browser — nothing is uploaded.
How to use Unix Timestamp Converter
Convert a timestamp
Type or paste a Unix timestamp into the left field. If it has 13 or more digits it is read as milliseconds; otherwise it is treated as seconds.
Read the date breakdown
The tool shows the moment in your local time, UTC, ISO 8601 format, and as a relative phrase like "in 3 days" or "2 hours ago".
Convert a date
Use the date and time picker on the right to choose a moment in your local timezone and instantly see its Unix value in both seconds and milliseconds.
Jump to now
Click the Now button at any time to load the current moment into both sides, so you can read off the current timestamp.
Copy any value
Every output row has a copy button — grab the exact seconds, milliseconds, ISO string, or formatted date you need for your code or logs.
Common uses
- Convert a Unix timestamp from a log or database into a readable date
- Get the current epoch time in seconds or milliseconds
- Turn a specific calendar date into a Unix timestamp for a query
- Check whether a stored value is in seconds or milliseconds
- See a timestamp in UTC and your local timezone side by side
- Produce an ISO 8601 string for an API request or config file
Why choose FreeTools
100% private
Your files are processed inside your browser and are never uploaded to a server.
Free, no account
No sign-up, no watermark, no paywalled “premium” tier. Just open a tool and use it.
Instant
No upload, no queue, no server round-trip — work starts the moment you drop a file.
Runs in your browser
Built on open web standards. Works on any modern desktop browser, nothing to install.
No upload size caps
Nothing leaves your device, so there’s no server file-size limit — only your machine’s memory.
Yours to keep
Results download straight to your device in clean, standard file formats.