Unix Epoch Time Converter: Convert Timestamps Online
Convert Unix epoch timestamps to human-readable dates and vice-versa locally in your browser. Automatically detects seconds and milliseconds without uploading data to external servers.
Human Date ↔ Unix Converter
What Is a Unix Epoch Timestamp?
The **Unix Epoch** (or Unix Time) is a system for tracking time defined as the number of elapsed seconds since Thursday, January 1, 1970 at 00:00:00 Coordinated Universal Time (UTC). It does not account for leap seconds. Because this system tracks time as a single rising integer, it is widely used in databases, APIs, and operating systems to log actions, events, and records.
This tool processes your data locally in your browser, so no inputs need to be sent to our server. All timestamp conversions occur in your local web session RAM using client-side JavaScript date libraries, ensuring developer data privacy and working entirely offline.
Key Features
- Seconds & Milliseconds Auto-Detection: Gracefully detects 10-digit (seconds) vs 13-digit (milliseconds) input lengths.
- Bidirectional Calculations: Converts Unix integers to date formats, or parses standard date strings back to epoch seconds.
- Before 1970 Support: Handles negative integers to calculate timestamps before the 1970 epoch.
- Zero Logs Captured: Hashing and parsing execute entirely on your device, with no server-side request tracking.
How To Use
- 1 Epoch to Date: Type or paste your Unix timestamp value (e.g.,
1781882356) into the left field. - 2 Date to Epoch: Alternatively, enter a human date string in the right field to get epoch seconds.
- 3 Read Output: GMT/UTC and local time conversions display dynamically in the output cards.
- 4 Code Reference: Check programmatic snippets below for database, scripts, or query setups.
Developer Code Snippets for Epoch Conversion
To convert between human dates and Unix timestamps in your scripts, use the following code patterns:
JavaScript / Node.js
const seconds = Math.floor(Date.now() / 1000);
// Convert timestamp back to JS Date object
const date = new Date(seconds * 1000);
Python
from datetime import datetime
# Get current timestamp
seconds = int(time.time())
# Convert timestamp to date object
date = datetime.utcfromtimestamp(seconds)
SQL (PostgreSQL)
SELECT EXTRACT(epoch FROM NOW());
-- Convert integer back to timestamp
SELECT TO_TIMESTAMP(1781882356);
Important Concepts & FAQs
The Year 2038 Problem affects systems using signed 32-bit integers to store Unix timestamps. The maximum value a signed 32-bit integer can hold is 2,147,483,647, which represents January 19, 2038 (at 03:14:07 UTC). Past this moment, the integer wraps around to a negative number, resetting dates to 1901. Modern 64-bit systems and JavaScript's double-precision floating-point numbers handle numbers up to 9,007,199,254,740,991, which easily avoids any overflow issues for billions of years.
Unix timestamps represent absolute values in Coordinated Universal Time (UTC/GMT) regardless of physical location. Converting an epoch integer to a local date string uses the local browser timezone offset to adjust the hours and minutes accordingly.
No. This tool processes your data locally in your browser, so no inputs need to be sent to our server. All date calculations and format updates are completed within your local browser page thread.
Privacy Promise
This tool runs entirely inside your browser. Your files never leave your device.