Timestamp Converter
Convert between Unix timestamps and human-readable dates in multiple formats
Introduction
Got a Unix timestamp like 1704369600 and need to know what date that is? Or need to convert a specific date into a timestamp for your code or database query? This tool converts between Unix timestamps and readable dates instantly. Handles both seconds (10 digits) and milliseconds (13 digits) formats automatically. Shows the result in multiple formats: your local time, UTC, ISO 8601 for APIs, and relative time like '3 hours ago' or 'in 2 days'. Everything happens in your browser—your timestamps never leave your computer. Good for debugging API responses, writing database queries, analyzing server logs, or testing time-based features. Hit the Current Time button to grab the current timestamp. Copy any format with one click. No sign-up, no limits, works entirely offline once loaded.
Who Should Use This Tool?
- Backend developers debugging API responses with Unix timestamps
- Database administrators writing queries with timestamp filters
- DevOps engineers analyzing server logs with timestamp entries
- QA testers verifying time-based features and date handling
- Frontend developers working with date pickers and time displays
- System administrators coordinating time between different systems
- Data analysts converting timestamps in exported data files
- Technical support staff investigating time-related user issues
- API developers testing timestamp parameters and responses
- Mobile app developers handling push notification scheduling
How This Tool Works
The Timestamp Converter works in both directions—converting Unix timestamps to human-readable dates and vice versa. When you enter a Unix timestamp, the tool automatically detects whether it's in seconds (10 digits) or milliseconds (13 digits) format and converts it accordingly. For timestamp-to-date conversion, it displays the result in multiple formats simultaneously: your local timezone (with automatic daylight saving time adjustment), UTC (universal coordinated time that's the same everywhere), ISO 8601 format (the international standard used by APIs and databases), and relative time (human-friendly descriptions like '3 hours ago' or 'in 2 days'). When converting dates to timestamps, you can either use the built-in date picker to select any date and time, or click the Current Time button to instantly grab the current moment. The tool then generates both the seconds and milliseconds versions of the timestamp. All conversions happen instantly in your browser using JavaScript's Date object, which means your data stays completely private. The interface updates in real-time as you type, so you can see the conversion results immediately without clicking any buttons. Each output format includes a copy button that lets you quickly paste the result wherever you need it—into your code, database query, API call, or terminal command.
Try Timestamp Converter Now
Use the interactive tool below to get instant results
Real-Time Conversion
Convert between Unix timestamps and human-readable dates instantly. Automatic unit detection for timestamps.
Conversion Mode
Enter Timestamp
Enter a Unix timestamp in seconds or milliseconds. Unit is detected automatically.
⏰ Quick Reference
• Unix Timestamp: Seconds since January 1, 1970 (UTC)
• Seconds: 10-digit number (e.g., 1704369600)
• Milliseconds: 13-digit number (e.g., 1704369600000)
• Current time: 1769876098 (seconds) or 1769876098077 (ms)
How to Use Timestamp Converter
Pick Your Direction
Converting a timestamp to a date? Or a date to a timestamp? Pick which way you need. The tool remembers your choice. You can switch anytime without losing what you typed.
Enter Your Input
For timestamps: paste your Unix timestamp. Could be seconds (10 digits like 1704369600) or milliseconds (13 digits like 1704369600000)—the tool figures it out. For dates: use the date picker or hit Current Time to grab right now.
See All the Formats
Results show up instantly in your local timezone, UTC, ISO 8601 format (good for APIs and databases), and relative time (like '5 minutes ago'). Everything updates as you type.
Copy What You Need
Hit the copy button next to whichever format you want. Paste it into your code, database query, API call, or wherever you need it.
Use Cases for Timestamp Converter
Debugging API Responses
API returns 1704369600 and you need to know what date that is? Convert it to see if the timestamp makes sense. Helps catch timezone bugs or check if the API is returning the right data.
Writing Database Queries
Need to query records from January 4, 2024? Convert that date to a Unix timestamp and use it in your WHERE clause. Or convert timestamps from query results to readable dates to verify you got the right rows.
Reading Server Logs
Log lines show timestamps like 1704369600. Convert them to readable dates to figure out when errors happened or how long between events. Way easier than trying to do timestamp math in your head.
Testing Time Features
Testing scheduling, expiration dates, or time-sensitive features? Generate specific timestamps for past or future dates to test edge cases. Make sure your code handles dates correctly.
Coordinating Between Systems
One system uses seconds, another uses milliseconds, and you need them to match? Convert between formats to make sure everything is talking about the same moment in time.
Key Features
Goes Both Ways
Convert timestamp to date or date to timestamp
Auto Detects Format
Figures out if your timestamp is in seconds or milliseconds
Your Local Time
Shows time in your timezone with daylight saving handled automatically
UTC Time
Universal time that is the same everywhere
ISO 8601 Format
Standard format for APIs and databases (like 2024-01-04T12:00:00.000Z)
Relative Time
Shows things like '3 hours ago' or 'in 2 days'
Current Time Button
Grab the current timestamp with one click
Copy Any Format
Copy button for each result format
Date Picker
Easy date and time picker for selecting dates
Instant Results
Converts as you type with no delay
Frequently Asked Questions
What is a Unix timestamp?
A number representing how many seconds (or milliseconds) have passed since January 1, 1970 at midnight UTC. It is the standard way computers store dates and times because it works the same everywhere, no matter what timezone you are in. Easy to compare, easy to do math with, and every programming language understands it.
How do I know if my timestamp is in seconds or milliseconds?
Count the digits. Seconds timestamps have 10 digits (like 1704369600). Milliseconds timestamps have 13 digits (like 1704369600000). The tool auto-detects based on length. JavaScript uses milliseconds. Most Unix systems and APIs use seconds.
Why is local time different from UTC?
Local time adjusts for your timezone. UTC is the same everywhere in the world—no timezone offset. If you are in New York (EST), your local time is UTC minus 5 hours. If you are in India (IST), it is UTC plus 5 hours 30 minutes. The tool shows both so you can see the difference.
What is ISO 8601 format used for?
ISO 8601 looks like 2024-01-04T12:00:00.000Z and is the international standard for dates and times. The Z at the end means UTC. This format sorts correctly as text, works in every database and API, and does not have any ambiguity about what date you mean. Use it when storing or sending timestamps.
Are my timestamps kept private?
Yep. Everything happens in your browser. Your timestamps never get sent to any server or stored anywhere. Safe to use with production data.