Unix Timestamp Converter
Convert between Unix timestamps and readable dates
Timestamp → Date
Date → Timestamp
What is a Unix Timestamp Converter?
A Unix timestamp converter translates between Unix epoch time (seconds or milliseconds since 1 January 1970 UTC) and human-readable dates. Developers use it for API debugging, log analysis, database fields, JWT expiry checks, and JavaScript date work.
Convert both directions without installing software — paste a timestamp from server logs or pick a datetime to get epoch values for test fixtures, documentation, and support tickets.
How to Use This Unix Timestamp Converter
- Timestamp → Date: Paste a Unix timestamp (10-digit seconds or 13-digit milliseconds) and read the local and UTC datetime.
- Click Now to insert the current Unix timestamp in seconds.
- Date → Timestamp: Open the date picker, choose date and time, click Convert, and read seconds and milliseconds.
- Use the Now button when you need the current epoch for API tests or log correlation.
Notes
Unix time is defined in UTC. Local time display uses your browser timezone. Values beyond standard range may show an error. This tool is for development and general reference only — validate critical systems against your platform’s date library.
Remember that MySQL, PostgreSQL, JavaScript, Python, and Go may use seconds or milliseconds by default — always check your stack’s convention before writing to production databases or mobile clients.
Frequently Asked Questions
What is a Unix timestamp?
It is the count of seconds (or milliseconds) since the Unix epoch: 1970-01-01 00:00:00 UTC, excluding leap seconds in common programming practice.
Seconds vs milliseconds?
Classic Unix uses 10-digit seconds (e.g., 1718409600). JavaScript and many APIs use 13-digit milliseconds (e.g., 1718409600000). This tool accepts both and detects by length.
What timezone is shown?
Converted dates show your local timezone plus UTC for reference. Epoch itself is timezone-independent; only display labels change.
Why does my API use a different format?
Some systems use ISO 8601 strings instead of integers. Convert here first, then format with your language’s date library (JavaScript Date, Python datetime, etc.).
What is the Year 2038 problem?
32-bit signed Unix seconds overflow after 03:14:07 UTC on 19 January 2038. Modern systems often use 64-bit integers or milliseconds, but legacy embedded systems may still be affected — plan migrations early if you maintain old infrastructure.
Does daylight saving time affect Unix time?
No. Epoch seconds are defined in UTC and do not shift with DST. Only the local display string changes when your timezone rules apply offsets for summer and winter time.
Related Tools
See Timezone Converter, Age Calculator, and JSON Formatter when debugging APIs, scheduling across regions, or pretty-printing responses.