Epoch Converter (Unix Timestamp)
Convert Unix time ⇆ human-readable date with UTC and timezone support. Detect seconds vs milliseconds automatically.
Epoch Cheatsheet
| Event | UTC | Epoch (sec) | Epoch (ms) |
|---|---|---|---|
| Unix Epoch Start | 1970-01-01 00:00:00 | 0 | 0 |
| Year 2038 boundary | 2038-01-19 03:14:07 | 2147483647 | 2147483647000 |
| ISO Week starts (example) | 2025-01-06 00:00:00 | 1736112000 | 1736112000000 |
Tips & How to Use
- 1. Paste an epoch timestamp or pick Now.
- 2. Choose a time zone to format output (UTC is always shown as well).
- 3. For date → epoch, enter a date/time and choose how to interpret it (UTC or selected time zone).
- 4. Use Copy or Share Link to keep your results.
- 5. We auto-detect seconds vs milliseconds. You can force the mode if needed.
Related Tools
🔌 API for Developers
Use our free REST API for Unix timestamp conversion. Supports GET/POST requests, 100 requests/hour rate limit, built-in caching and logging system.
API Features:
- Convert Epoch → Date/Time and Date/Time → Epoch
- Supports 400+ timezones
- Rate limit: 100 requests/hour
- Caching system (1 hour TTL)
- Auto-detect seconds/milliseconds
Frequently Asked Questions (FAQ)
Unix timestamp or Epoch time is the number of seconds that have passed since January 1, 1970, 00:00:00 UTC (Unix Epoch start). It's commonly used to store time in computer systems, databases, APIs, and programs because it's a single number independent of timezones.
Example: 1685550000 = 31 May 2023, 18:00:00 UTC
- 10 digits = seconds, e.g.,
1685550000 - 13 digits = milliseconds, e.g.,
1685550000000
JavaScript typically uses milliseconds (Date.now()), while Unix and PHP use seconds. This tool auto-detects, and you can force the mode if needed.
- Enter Unix timestamp in the Epoch Input field
- Select your desired timezone (e.g., UTC, America/New_York)
- Click Convert
- Get human-readable date/time instantly (with UTC always shown)
Supports both seconds and milliseconds with auto-detection.
- Go to Date/Time → Epoch tab
- Pick your date/time (supports seconds precision)
- Choose to interpret as UTC or Local time (based on selected timezone)
- Click Convert
- Get Unix timestamp in both seconds (10 digits) and milliseconds (13 digits)
100% safe because all processing happens in your browser only (client-side processing). No data is sent to any server. Your data remains completely private and secure.
✓ No data collection
✓ No server uploads
✓ Works offline (after page load)
Supports 400+ timezones worldwide, including:
- UTC, GMT - Universal time standards
- America/New_York (EST/EDT)
- Europe/London (GMT/BST)
- Asia/Tokyo (JST)
- Asia/Bangkok (UTC+7)
- Australia/Sydney
Use the Search Time Zone field to find your timezone.
Yes! We provide a free REST API for Unix timestamp conversion. Features include:
- ✅ Convert epoch to date/time and vice versa
- ✅ Support for GET and POST requests
- ✅ Rate limit: 100 requests per hour per IP
- ✅ Built-in caching system (1 hour TTL)
- ✅ Full timezone support (400+ timezones)
- ✅ Auto-detection of seconds vs milliseconds
- ✅ Complete API documentation
View the API Documentation for details, examples, and code samples.
Common Use Cases & Examples
🔍 Debug Logs & Timestamps
Convert timestamps from log files, error messages, or database records to find when issues occurred.
Log: Error at 1735689600 → 1 Jan 2025
⚙️ API Development & Testing
Test APIs using Unix timestamps for data like created_at, expires_at, last_modified fields.
{"expires_at": 1735689600}
📅 Event Scheduling
Convert event times, meetings, or deadlines to Unix timestamps for calendar apps or reminder systems.
Meeting: 15 Jan 2025 14:00 → 1736949600
🌐 Timezone Conversion
Convert times across timezones for international meetings or events with participants from different countries.
Bangkok 10:00 → NY 22:00 (prev day)
🔐 JWT Token Expiration
Check JWT token expiration dates (exp claim) which use Unix timestamps.
{"exp": 1735689600, "iat": 1735603200}
💾 Database Queries
Create WHERE conditions for database queries that store time as Unix timestamps.
WHERE created_at > 1735689600
📖 Quick Reference Guide
Common Unix Timestamp Formats
| Format | Example | Used in |
|---|---|---|
| Seconds (10 digits) | 1735689600 |
Unix, PHP, Python |
| Milliseconds (13 digits) | 1735689600000 |
JavaScript, Java |
| Microseconds (16 digits) | 1735689600000000 |
Python (time.time()) |
Important Unix Epoch Dates
| Event | Date (UTC) | Timestamp |
|---|---|---|
| Unix Epoch Start | 1970-01-01 | 0 |
| Year 2000 (Y2K) | 2000-01-01 | 946684800 |
| Year 2038 Problem | 2038-01-19 | 2147483647 |
| 2025 Start | 2025-01-01 | 1735689600 |
Code Examples in Various Languages
// Get current timestamp (ms)
Date.now() // 1735689600000
// Convert to seconds
Math.floor(Date.now() / 1000)
// From timestamp
new Date(1735689600000)// Get current timestamp (sec)
time(); // 1735689600
// From timestamp
date('Y-m-d H:i:s', 1735689600);
// To timestamp
strtotime('2025-01-01');import time, datetime
# Get current timestamp
time.time() # 1735689600.0
# From timestamp
datetime.fromtimestamp(1735689600)-- Get current timestamp
SELECT UNIX_TIMESTAMP();
-- From timestamp
SELECT FROM_UNIXTIME(1735689600);
-- WHERE query
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