Unix Timestamp Converter

How the Unix Timestamp Converter works

Unix time (or epoch time) counts seconds elapsed since January 1, 1970 00:00:00 UTC. It is the foundation of most timestamp systems in programming. This tool converts in both directions: paste any epoch value to get the human-readable date in UTC and local time, or enter a date to get its epoch equivalents in both seconds and milliseconds. The live counter at the top shows the current Unix timestamp updating every second.

Why Developers Constantly Need a Unix Timestamp Converter

Open almost any server log, database record, API response, or JWT token and you'll find a Unix timestamp. A number like 1700000000 means absolutely nothing to a human eye — but to a computer it's a precise point in time. This converter translates instantly in both directions: paste any epoch number and see the corresponding date in UTC, your local timezone, and ISO 8601; or pick a date and get the epoch equivalents in both seconds and milliseconds. The live counter at the top shows the current Unix timestamp updating every second — useful for quick sanity checks when debugging time-sensitive code.

Key Features

• Live current timestamp: Shows the current Unix time in both seconds and milliseconds, updating every second — the fastest way to get the current epoch without opening a console.
• Epoch to Date conversion: Supports both seconds and milliseconds input — select the correct unit to avoid off-by-1000× errors in your conversions.
• 4 date formats: UTC, your local timezone, ISO 8601, and day of week — showing the same moment in every format you're likely to need.
• Date to Epoch conversion: Pick any date and time from the datetime-local picker and get both the seconds and milliseconds epoch values — with copy buttons on each.
• Instant conversion: Both converters update as you type — no button press required. The live feedback helps catch typos in long timestamp values immediately.

Real-Life Use Cases

• Debugging log files: Server and application logs frequently store timestamps as epoch values. Convert the numbers to see exactly when an error or event occurred in human time.
• Validating JWT tokens: JSON Web Tokens contain iat (issued at) and exp (expiry) claims as Unix timestamps. Convert them to verify a token isn't expired or wasn't issued in the future.
• API response debugging: REST and GraphQL APIs often return timestamps as Unix epochs in JSON. Convert them to understand the data without guessing.
• Database timestamp queries: When writing SQL queries with epoch timestamp columns, use the Date → Epoch converter to build the correct comparison values.
• Scheduled job verification: Confirm that a cron job or scheduled task ran at the expected time by converting its logged timestamp to a human-readable date.

Who Can Use This Tool

Primarily backend developers, full-stack engineers, and DevOps professionals who work with timestamps in logs, APIs, databases, and authentication systems. QA engineers verifying that time-based features work correctly will reach for it when examining test data. Data analysts parsing raw event data with epoch columns will use it to make sense of their datasets. Students learning about server-side programming encounter Unix timestamps early and often — this is the quickest way to develop an intuitive feel for what a timestamp value corresponds to in real time.

Tips & Best Practices

• 13 digits = milliseconds, 10 digits = seconds: The fastest way to check whether you're looking at seconds or milliseconds — a timestamp around 1700000000000 is milliseconds, 1700000000 is seconds.
• JavaScript Date.now() returns milliseconds: If you're working in JavaScript, remember to divide by 1000 to get seconds: Math.floor(Date.now() / 1000).
• Always consider timezone when converting: The UTC result is the authoritative time. Your local time result will differ based on your timezone — be careful when comparing timestamps from servers in different regions.
• Use ISO 8601 for storage and APIs: If you're designing a system, consider storing timestamps as ISO 8601 strings instead of epochs — they're human-readable and unambiguous about timezone.
• Negative timestamps = pre-1970: Epoch can represent dates before January 1, 1970 — negative values go back in time from the Unix epoch.