Unix Timestamp Converter — Epoch to Date & Date to Epoch

What Is a Unix Timestamp?

A Unix timestamp (also called Epoch time) is the number of seconds that have elapsed since January 1, 1970 00:00:00 UTC — the Unix Epoch. It is a simple, timezone-independent way to represent a moment in time as a single integer. Some systems use milliseconds instead of seconds (JavaScript's Date.now() returns milliseconds).

Where Timestamps Are Used

• Databases — MySQL, PostgreSQL, and SQLite all store date/time columns that map to Unix timestamps internally.
• APIs — JSON responses frequently include created_at or expires_at as Unix timestamps.
• JWT tokens — The exp, iat, and nbf claims are all Unix timestamps in seconds.
• Log files — Server and application logs stamp entries with Unix timestamps for easy sorting and filtering.
• Cache expiry — Laravel's cache and session systems store expiry times as Unix timestamps.

Seconds vs Milliseconds

Unix timestamps are traditionally in seconds (10 digits, e.g. 1700000000). JavaScript and many frontend APIs use milliseconds (13 digits, e.g. 1700000000000). If a timestamp looks too large or too small, switch the unit toggle above.

The Year 2038 Problem

32-bit systems store Unix timestamps as a signed 32-bit integer, which overflows on January 19, 2038. Modern 64-bit systems are unaffected — they can represent timestamps hundreds of billions of years into the future.

Timestamps in PHP and Laravel

• time() — Returns the current Unix timestamp in seconds
• strtotime('2024-01-01') — Converts a date string to a Unix timestamp
• date('Y-m-d H:i:s', $timestamp) — Formats a timestamp as a human-readable date string
• Carbon::createFromTimestamp($ts) — Creates a Carbon instance from a Unix timestamp
• now()->timestamp — Gets the current timestamp via Laravel's Carbon helper
• Carbon::parse('2024-01-01')->timestamp — Converts a date string to a timestamp via Carbon

In database migrations, Laravel's $table->timestamp('created_at') stores dates internally. Eloquent automatically casts created_at and updated_at to Carbon instances, which expose ->timestamp for the raw integer value.

Privacy & How It Works

All conversions happen entirely in your browser using JavaScript's built-in Date object. No timestamp, date, or any other data is transmitted to any server.

• No server calls — Conversion logic runs locally in JavaScript.
• Works offline — Once the page loads, no internet connection is needed.
• GDPR-safe — Zero data transmission, zero data collection.