Epoch Converter

What is a Unix Timestamp (Epoch Time)?

A Unix timestamp, also called epoch time, is a system for tracking time as a running total of seconds since January 1, 1970, 00:00:00 UTC — a moment known as the Unix Epoch. This standard was introduced with the Unix operating system in the early 1970s and has since become the universal method for storing and communicating time in software systems worldwide.

The value 0 represents midnight on January 1, 1970. A timestamp of 1704067200 represents January 1, 2024 at 00:00:00 UTC. Every second that passes, the Unix timestamp increments by 1. For millisecond precision, the value is multiplied by 1,000 — so the same moment in milliseconds would be 1704067200000. Microsecond timestamps multiply by 1,000,000, producing 16-digit numbers.

The JumpTools Epoch Converter automatically detects whether you have pasted a 10-digit (seconds), 13-digit (milliseconds), or 16-digit (microseconds) timestamp, eliminating the guesswork. This is particularly useful when switching between programming languages — Python's time.time() returns seconds, while JavaScript's Date.now() returns milliseconds.

Common Use Cases for Epoch Conversion

Unix timestamps are embedded in nearly every piece of modern software. Understanding how to read and convert them is a fundamental skill for developers, database administrators, and system engineers.

Database queries: SQL databases like MySQL and PostgreSQL store timestamps in DATETIME or TIMESTAMP columns. When debugging queries, you may encounter raw epoch values in query logs or explain outputs. Converting these to human-readable dates instantly tells you when a record was created or modified.

API responses: REST APIs commonly return timestamps as Unix values in JSON responses. For example, "created_at": 1704067200 is far more compact and unambiguous than a formatted date string. When inspecting API responses in tools like Postman or browser DevTools, epoch conversion lets you understand the timeline of events.

Log file analysis: Server access logs, application logs, and security audit trails often record events as Unix timestamps for performance reasons. Converting log timestamps helps you correlate events across systems with different timezone configurations — since epoch time is always UTC-based.

JWT tokens: JSON Web Tokens contain iat (issued at) and exp (expiration) claims as Unix timestamps. When debugging authentication issues, converting these values tells you exactly when a token was issued and when it expires.

Output Formats: ISO 8601, RFC 2822, and SQL DATETIME

Different systems expect time in different formats. Our converter outputs all the major formats simultaneously so you can copy exactly what your system needs.

ISO 8601 (2024-01-01T00:00:00.000Z) is the international standard used by web APIs, JSON data, and modern databases. The trailing Z indicates UTC. This format is unambiguous and sorts correctly alphabetically.

RFC 2822 (Mon, 01 Jan 2024 00:00:00 +0000) is the format used in email headers and HTTP responses. You will see this in the Date field of HTTP responses and SMTP message headers.

SQL DATETIME (2024-01-01 00:00:00) is the format accepted by MySQL, PostgreSQL, SQLite, and most relational databases. Use this when constructing or debugging SQL queries with date comparisons.

The relative time output ("2 hours ago", "in 3 days") is especially useful when working with event-driven systems or reviewing recent log entries — it instantly conveys how far in the past or future a timestamp is without mental arithmetic.