Developer · Free Tool
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and back — seconds or milliseconds, local time and UTC.
About this tool
Convert a Unix timestamp into a human-readable date (shown in both your local timezone and UTC), or pick a date and time to get its timestamp. The tool auto-detects whether a timestamp is in seconds or milliseconds, and shows the live current timestamp.
Unix time counts seconds since January 1, 1970 UTC and is the universal machine format for dates in databases, logs, APIs, and JWT tokens — this converter is the fastest way to make those numbers readable.
Common uses
- Decode created_at or exp values from an API response or JWT
- Find the exact timestamp for a scheduled job or query filter
- Check what moment a log entry's epoch value refers to
Frequently asked questions
How do I know if a timestamp is seconds or milliseconds?
Length is the giveaway: current timestamps are 10 digits in seconds and 13 digits in milliseconds. The tool auto-detects this, and 10-digit values will remain valid until the year 2286.
What is the year-2038 problem?
Systems storing Unix time in signed 32-bit integers overflow on January 19, 2038. Modern 64-bit systems and languages are unaffected.
Is my data uploaded to a server?
No. This tool runs entirely in your browser using JavaScript — nothing you type is transmitted, logged, or stored anywhere. You can even use it offline once the page has loaded.