About Timestamp Converter
The Timestamp Converter translates Unix timestamps into human-readable dates and back. Paste an epoch value — it auto-detects whether it's in seconds or milliseconds — and see the local time, UTC, ISO 8601 string and relative time ('3 days ago') at once.
The reverse direction converts any date and time from your local zone into Unix seconds and milliseconds, and a Now button grabs the current timestamp instantly.
Unix time (seconds since January 1, 1970 UTC) is everywhere in logs, APIs, databases and JWTs — this tool makes those opaque numbers readable during debugging.
How to Use the Timestamp Converter
- Paste a Unix timestamp (10-digit seconds or 13-digit milliseconds) to decode it.
- Or pick a date and time to get its Unix seconds and milliseconds.
- Use the Now button for the current epoch time.
Features
- Auto-detects seconds vs milliseconds
- Shows local, UTC, ISO 8601 and relative time
- Two-way conversion with a Now shortcut
- Handles dates far into the past and future
Frequently Asked Questions
How does it know if my timestamp is seconds or milliseconds?
Values of a trillion (10¹²) or more are treated as milliseconds — in seconds that would be the year 33,658, so the split is unambiguous for real-world dates.
What was the year 2038 problem?
Systems storing Unix time in signed 32-bit integers overflow on January 19, 2038. Modern 64-bit systems (and JavaScript) are unaffected.
Is the Timestamp Converter free?
Yes, the Timestamp Converter is completely free with no usage limits. No signup, no account and no installation required.
Does the Timestamp Converter work on mobile?
Yes. The Timestamp Converter is fully responsive and works in any modern browser on phones, tablets and desktops.
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