Unix Timestamp Converter (Epoch) Online
Convert a Unix timestamp to a readable date or a date to a timestamp. Real-time epoch clock, support for seconds and milliseconds, multiple timezones. Free, no sign-up.
Current Unix Timestamp
1773652324
2026-03-16T09:12:04.000Z
Timestamp → Date
Date → Timestamp
🔒 Your data never leaves your browser
100% secure
Your files are never shared
Ultra-fast
Processing in seconds
Privacy
Automatic deletion after 1h
How to convert Unix timestamps
Enter a timestamp or date
Paste a Unix timestamp (seconds or milliseconds) to convert it to a readable date, or fill in a date to get the corresponding timestamp.
Choose your timezone
Select a timezone to see the date in the correct local time. The tool auto-detects your local timezone by default.
Copy the results
Results are displayed in multiple formats (local, ISO 8601, UTC, relative). Click the copy button on any format to copy it.
The history of Unix Epoch
The Unix Epoch (January 1, 1970, 00:00:00 UTC) was chosen by Ken Thompson and Dennis Ritchie when developing Unix at Bell Labs. The date was chosen somewhat arbitrarily — it was recent enough to be useful, and the 32-bit counter could represent dates until 2038.
Since then, the Unix timestamp has become the universal standard for representing time in computing. Every major programming language, database, and operating system supports it natively.
Timestamps in APIs
REST APIs commonly use Unix timestamps instead of formatted date strings because they are timezone-agnostic, unambiguous, compact, and easy to compare mathematically. A timestamp like 1742045400 means exactly the same thing regardless of where the server or client is located.
Some APIs use seconds (Unix standard), others use milliseconds (JavaScript standard). Always check the API documentation. A quick way to tell: 10 digits = seconds, 13 digits = milliseconds.
Timezones and UTC: the source of bugs
Timezone-related bugs are among the most common in software development. A timestamp stored in UTC is absolute, but displaying it in a user's local timezone requires knowing their offset — which changes with daylight saving time.
Best practice: always store timestamps in UTC (or as Unix timestamps), and only convert to local time for display. Never store local times without timezone information.
The Y2K38 problem explained
On January 19, 2038 at 03:14:07 UTC, the Unix timestamp will reach 2,147,483,647 — the maximum value of a signed 32-bit integer. Systems still using 32-bit timestamps will overflow, potentially interpreting dates as December 13, 1901.
Most modern systems have already migrated to 64-bit timestamps, which can represent dates billions of years into the future. However, embedded systems, legacy databases, and older file formats may still be affected.
Code examples
Getting the current timestamp: JavaScript — Date.now() returns milliseconds, use Math.floor(Date.now()/1000) for seconds. Python — time.time() returns a float in seconds. PHP — time() returns seconds. Java — System.currentTimeMillis() returns milliseconds.
Converting a timestamp to a date: JavaScript — new Date(timestamp * 1000). Python — datetime.fromtimestamp(timestamp). PHP — date('Y-m-d H:i:s', timestamp). SQL — FROM_UNIXTIME(timestamp) in MySQL, to_timestamp(timestamp) in PostgreSQL.
Unix Timestamp Converter (Epoch) Online — Frequently asked questions
What is a Unix timestamp?
A Unix timestamp (also called Epoch time or POSIX time) is the number of seconds elapsed since January 1, 1970 at 00:00:00 UTC. It is a universal standard used by computer systems to represent time in a simple and unambiguous way.
What is the difference between seconds and milliseconds?
A timestamp in seconds has 10 digits (e.g., 1742045400). A timestamp in milliseconds has 13 digits (e.g., 1742045400000). JavaScript uses milliseconds (Date.now()), while Unix systems and most APIs use seconds. Our tool auto-detects the format.
What is the Year 2038 problem?
Systems that store Unix timestamps as signed 32-bit integers will not be able to represent dates after January 19, 2038 at 03:14:07 UTC. This is when the value exceeds the format capacity. The solution is to migrate to 64-bit integers, which most modern systems already do.
Is my data sent to a server?
No. The conversion happens entirely in your browser. No data passes through our servers.
Why is the timestamp the same everywhere in the world?
The Unix timestamp represents an absolute instant (seconds since Epoch in UTC). It does not depend on timezone. This is what makes it so useful for distributed systems — two servers in different timezones share exactly the same timestamp for the same moment.
How do I get the current timestamp in my code?
JavaScript: Date.now() (milliseconds) or Math.floor(Date.now()/1000) (seconds). Python: import time; time.time(). PHP: time(). Java: System.currentTimeMillis()/1000.
Similar tools
JSON Formatter
Format, validate and minify JSON online
Base64 Encode/Decode
Encode and decode text and images in Base64
URL Encode/Decode
Encode and decode URLs and query parameters
Regex Tester
Test regular expressions in real-time
UUID Generator
Generate UUID v4 and v7 identifiers
Password Generator
Generate strong, secure passwords