Unix Timestamp Converter
Convert Unix timestamps to dates and dates to timestamps, in seconds or milliseconds.
Current Unix time
Timestamp → date
Date → timestamp
What is Unix time?
Unix time (epoch) counts the seconds since 1 January 1970 00:00:00 UTC. Databases, APIs, logs and programming languages often store dates this way; 1735689600, for example, is 1 January 2025 00:00 UTC.
Two-way conversion
- Enter a timestamp to see it in ISO 8601, UTC and your local time
- Pick a date and time to get the Unix timestamp in seconds and milliseconds
Seconds or milliseconds?
10-digit values are seconds and 13-digit values are milliseconds (like JavaScript's Date.now()). The tool detects this automatically. All calculations happen in your browser.
How to use Unix Timestamp Converter
- Enter a timestamp or a date.
- The unit is detected automatically.
- Review the UTC, local and ISO 8601 values.
- Copy the value you need.
Why use this tool?
Understand timestamps instantly while reading logs, writing queries or testing APIs.
FAQ
How do I know a timestamp is in milliseconds?
13-digit timestamps are milliseconds; the tool detects this automatically.
What is the year 2038 problem?
Unix time stored in a signed 32-bit integer overflows on 19 January 2038. Modern systems use 64 bits to avoid it.
Does it account for my time zone?
Yes, the local time is shown in your device's time zone alongside UTC.
Related tools
JWT Decoder
Decode a JWT's header and payload and see exp, iat and nbf as readable dates.
Open toolCron Expression Generator
Build cron schedules from presets and read a plain-English explanation of when they run.
Open toolYouTube Timestamp Generator
Convert between seconds and HH:MM:SS and build YouTube chapter lines for your description.
Open toolUUID / GUID Generator
Generate random UUID v4 (GUID) identifiers in bulk for database keys and IDs.
Open tool