Quick Answer

Timestamp Converter is a free online Unix timestamp converter by ThinkaBell. It runs all conversions happen locally in your browser — no sign-up, no file uploads, and no data ever leaves your device.

Bidirectional conversion: Convert timestamps to dates and dates to timestamps instantly
Auto-detection: Automatically detects seconds vs milliseconds format
Live clock: Real-time current timestamp display that updates every second
Privacy-first: no data collection, no tracking, no uploads.
Free forever: no premium tiers, no hidden charges, no accounts.

Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and vice versa. Free online epoch converter with live clock, multiple formats, and instant results.

Working with APIs, databases, or log files that use Unix timestamps? This converter turns those raw numbers into readable dates — and the other way around. Enter a timestamp (seconds or milliseconds), or pick a date and time, and get the conversion instantly. The live clock shows the current epoch timestamp updating in real time. Everything runs in your browser — no data leaves your device.

Enter Unix Timestamp

Accepts seconds (10 digits) or milliseconds (13 digits). Auto-detected.

About This Tool

Timestamp Converter is a free online Unix timestamp conversion tool by ThinkaBell. It runs entirely locally in your browser — no sign-up, no server uploads, no data ever leaves your device.

Unix timestamps are everywhere in software development. APIs return them in JSON payloads, databases store them as integers, log files record events with epoch seconds, and JWT tokens encode expiration dates as timestamps. When you need to read these numbers or generate them from a human-readable date, this converter handles it instantly.

The tool supports both standard 10-digit second timestamps and 13-digit millisecond timestamps. It auto-detects which format you paste in, so you don't need to remember the difference. Paste "1700000000" and it knows you mean seconds. Paste "1700000000000" and it knows you mean milliseconds.

For developers working with JavaScript, the millisecond format is especially common — Date.now() returns milliseconds, and most JavaScript Date APIs expect millisecond input. For backend systems, databases like MySQL, PostgreSQL, and MongoDB often use second-precision timestamps. This tool bridges both worlds.

Converts Unix timestamps to human-readable date strings
Converts dates back to Unix timestamps
Auto-detects seconds vs milliseconds
Shows ISO 8601, UTC, and relative time formats
Live current timestamp clock
One-click copy for every output value
Keyboard shortcuts for power users
100% client-side — no data leaves your device

Why This Converter

Instant bidirectional conversion (timestamp to date, date to timestamp)
Auto-detection of seconds vs milliseconds format
Multiple output formats: ISO 8601, UTC, relative time
Live clock showing current epoch timestamp
Copy individual values with one click
No account, no signup, completely free

How to Use the Timestamp Converter

Converting between timestamps and dates takes just a few seconds. Here's how to get the most out of the tool.

Choose your conversion direction — Use the tabs to switch between "Timestamp → Date" and "Date → Timestamp" modes.
Enter your value — In timestamp mode, paste or type a Unix timestamp (10-digit seconds or 13-digit milliseconds). In date mode, select a date and time using the native pickers.
Click Convert — The tool processes your input and shows the result in multiple formats: Unix seconds, milliseconds, ISO 8601, UTC string, and relative time.
Copy any value — Click the copy button next to any output field to copy it to your clipboard.
Use keyboard shortcuts — Press Enter to convert, Ctrl+S to copy the first result, or Escape to clear.

Frequently Asked Questions

What is a Unix timestamp?

A Unix timestamp is the number of seconds that have elapsed since January 1, 1970, 00:00:00 UTC, known as the Unix epoch. It is a widely used standard for tracking time in computing systems, databases, APIs, and log files. Timestamps are timezone-independent integers, which makes them easy to store, compare, and sort programmatically.

Why are timestamps in seconds?

Seconds are the standard unit for Unix timestamps because they provide a simple, unambiguous way to represent a point in time as a single integer. Using seconds avoids complications with time zones, daylight saving, and calendar formats — making timestamps easy to store, compare, and sort across different systems and programming languages.

What is the Unix epoch?

The Unix epoch is midnight UTC on January 1, 1970 (00:00:00 UTC). All Unix timestamps count the number of seconds elapsed since this moment. Negative timestamps represent dates before the epoch, and positive timestamps represent dates after it. This starting point was chosen for its simplicity and because it coincided with the early days of Unix development.

How do I get the current timestamp?

This tool displays the live current Unix timestamp at the top, updating every second. In JavaScript you can use Math.floor(Date.now() / 1000) for seconds or Date.now() for milliseconds. In the terminal, run date +%s on Linux/Mac, or use PowerShell: [Math]::Floor((Get-Date -UFormat %s)).

What are milliseconds timestamps?

Milliseconds timestamps include three extra digits of precision beyond the standard Unix timestamp (e.g. 1700000000000 instead of 1700000000). They are commonly used in JavaScript (Date.now()), JSON APIs, and logging systems where sub-second timing matters. This tool auto-detects whether you enter seconds or milliseconds.

Key Terms

Unix Timestamp: The number of seconds elapsed since the Unix epoch (January 1, 1970, 00:00:00 UTC). Used as a universal time representation in computing.
Epoch: The starting point for a system's timekeeping. For Unix timestamps, the epoch is midnight UTC on January 1, 1970.
ISO 8601: An international standard for representing dates and times (e.g. 2023-11-14T22:13:20Z). Widely used in APIs, databases, and data exchange formats.