Unix Timestamp Converter

Epoch Time ↔ Human-Readable Date

Instantly convert Unix timestamps to readable dates and back. Auto-detects seconds or milliseconds, shows UTC, local time, ISO 8601, RFC 2822, and relative time, plus a visual timeline. All calculations happen in your browser — your data never leaves your device.

🔒 Calculated in your browser — your data never leaves your device

Current Unix Timestamp —

Timestamp Unit

Timestamp seconds

Date & Time local

Time format:

Conversion formula
Unix timestamp (seconds) × 1000 = JavaScript Date (milliseconds)

UTC
—
Coordinated Universal Time

Local Time

—

ISO 8601

—

YYYY-MM-DDTHH:mm:ssZ

RFC 2822

—

Email / HTTP header format

Relative

—

From now

Timeline — Epoch to Now

Jan 1, 1970 (Epoch) Now

Conversions use your browser's built-in Date object and your device's local timezone setting. Results are accurate to the second.

Timestamp (sec)	UTC Date	Event

How to Use the Unix Timestamp Converter

Enter a Timestamp or a Date

Type a Unix timestamp into the Timestamp field, or pick a date and time using the Date & Time field. The converter is fully bidirectional — entering a timestamp calculates the date instantly, and entering a date calculates the timestamp. No button press required.

Confirm the Unit

By default the tool auto-detects whether your number is in seconds (10 digits, the Unix standard) or milliseconds (13 digits, used by JavaScript and Java) based on length. Use the pill selector to force one or the other if you already know the unit.

Read Your Results and Timeline

The result cards show your converted date in UTC, your local timezone, ISO 8601, RFC 2822, and relative time. The visual timeline places your entered date on a line between the Unix Epoch (January 1, 1970) and right now, so you can see at a glance how far back — or forward — your timestamp sits.

Copy or Print Your Conversion

Click Copy Result to copy the primary UTC value to your clipboard. Click Print to generate a clean, printer-friendly summary that includes your result cards, the timeline, the calculation formula, and the reference table — all formatted for paper.

Frequently Asked Questions

What is a Unix timestamp?

How do I know if my timestamp is in seconds or milliseconds?

What happens on January 19, 2038?

Why are Unix timestamps always in UTC?

Can a Unix timestamp be negative?

Is my data safe when using this converter?

Unix Timestamp Converter

How to Use the Unix Timestamp Converter

Frequently Asked Questions

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