Timestamp Converter
Convert Unix timestamps and date strings instantly.
Tool code processes selected files and entered content in your browser and does not submit them to a TOOLGRID processing endpoint. TOOLGRID measures tool usage, not the content you enter.
- No TOOLGRID input upload
- No account
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What this tool does
Switch between epoch values and readable UTC/local date outputs.
Timestamp Converter turns raw epoch values into readable dates and converts date strings back to numeric timestamps.
It supports both Unix seconds and Unix milliseconds.
Where this tool earns its place
Convert Unix timestamps from application logs into human-readable dates to understand when events occurred.
Convert the exp claim from a JWT payload (a Unix timestamp) into a readable date to verify when the token expires.
Convert stored Unix timestamps from a database query result into readable dates without writing a conversion function.
What to check before relying on the result
- Performance and maximum practical input size depend on browser memory, device speed, and the structure of the input.
- Review the generated result before replacing or publishing an original file.
Open a nearby browser tool when you need to validate, convert, or reuse the result.
How to use
01Use Cases
Convert Unix timestamps from application logs into human-readable dates to understand when events occurred.
Convert the exp claim from a JWT payload (a Unix timestamp) into a readable date to verify when the token expires.
Convert stored Unix timestamps from a database query result into readable dates without writing a conversion function.
Convert timestamps from API request logs or headers to understand the timing of events during debugging.
Convert two timestamps to dates and mentally calculate the duration between events.
Tips & Tricks
- 01Unix timestamps are in seconds, not milliseconds
Standard Unix timestamps count seconds since Jan 1 1970. JavaScript's Date.now() returns milliseconds. If your timestamp has 13 digits, divide by 1000 to convert to seconds.
- 02Check your timezone
The converter shows time in your browser's local timezone by default. When comparing with server logs, confirm whether the logs use UTC.
- 03Use ISO 8601 for storage
When storing timestamps in databases or APIs, prefer ISO 8601 format (e.g. 2026-04-26T10:30:00Z) over raw Unix timestamps for human readability.
FAQ
02What is a Unix timestamp?
A Unix timestamp is the number of seconds that have elapsed since January 1, 1970, 00:00:00 UTC. It's a universal way to represent a moment in time across systems and timezones.
Why does my timestamp give the wrong date?
If your timestamp has 13 digits, it's in milliseconds (JavaScript convention) — divide by 1000 to get seconds. The tool accepts both formats.
Does the converter account for timezones?
The output is shown in your browser's local timezone. The raw Unix timestamp itself is always UTC-based.
Can I convert a date to a Unix timestamp?
Yes. Enter a date in the date input and the tool shows the corresponding Unix timestamp.
What's the maximum date a Unix timestamp can represent?
A 32-bit Unix timestamp overflows on January 19, 2038 (the Year 2038 problem). 64-bit timestamps, used by modern systems, are valid for hundreds of billions of years.