🕐 TIMESTAMP → DATE
Enter a Unix timestamp
📅 DATE → TIMESTAMP
Enter a date and time
// WORLD CLOCK — CURRENT TIME IN KEY ZONES
// convert Unix timestamps instantly
Convert Unix timestamps to human-readable dates and vice versa. Supports seconds, milliseconds, multiple timezones, and ISO 8601 — free, no sign-up required.
Paste a Unix timestamp (seconds or milliseconds) in the top-left panel. Pick a timezone and click Convert to see the human-readable date.
Use the datetime picker in the top-right panel to select a date and time. Choose the timezone the input is in and click Convert.
Click the copy icon next to any output row to grab that value. Use the live clock banner at the top to copy the current Unix time instantly.
Timestamp Converter is a free browser-based tool that converts Unix epoch timestamps to human-readable dates and vice versa. It auto-detects seconds vs milliseconds, supports 17 timezones, outputs ISO 8601, RFC 2822, and relative formats, and includes a live ticking clock showing the current Unix time at a glance.
A Unix timestamp (also called epoch time) is the number of seconds that have elapsed since January 1, 1970, at 00:00:00 UTC. It is a universal, timezone-independent way to represent a point in time, widely used in databases, APIs, log files, and JWT tokens.
A 10-digit number is almost always seconds (valid through the year 2286). A 13-digit number is milliseconds. This tool auto-detects the precision — if the input is larger than 10¹¹, it treats it as milliseconds and divides by 1000 before converting.
ISO 8601 is the international standard for representing dates and times, for example 2024-11-14T22:13:20+00:00. The format is unambiguous, sortable alphabetically, and understood by virtually every programming language and database engine.
The Unix epoch (January 1, 1970 00:00:00 UTC) was chosen by the early Unix developers as a convenient reference point. It predates most of the systems that would later adopt the standard, so most timestamps encountered in practice are positive numbers.
On systems that store Unix time as a 32-bit signed integer, the maximum value overflows on January 19, 2038. Modern 64-bit systems are not affected. This tool uses JavaScript's 64-bit floating point numbers, so it handles dates far beyond 2038 correctly.
Yes. Negative timestamps represent dates before January 1, 1970 UTC. For example, -86400 is December 31, 1969. This tool handles negative values correctly as long as the date is within the range supported by JavaScript's Date object.
Unix timestamps are everywhere in modern software. Every database row with a created_at column, every JWT token with an exp claim, every server log entry, every HTTP header with a Last-Modified field — all of these rely on the Unix epoch as their time reference. When you are debugging an API response, inspecting a database record, or verifying an authentication token, you need to convert that opaque integer into a date you can actually read. This tool makes that conversion instant.
One of the most common sources of confusion with Unix timestamps is precision. The original Unix standard uses seconds, producing 10-digit numbers like 1700000000. JavaScript, Java, and many modern APIs use milliseconds, producing 13-digit numbers like 1700000000000. This converter auto-detects which precision you have entered and adjusts automatically. Both the seconds and milliseconds values are shown in the output so you always have the right format for your target system.
Unix timestamps are always in UTC by definition — they represent an absolute point in time with no timezone attached. The timezone only matters when you display the timestamp as a human-readable date. This converter lets you select from 17 common timezones when converting a timestamp to a date, so you can see exactly what time that epoch represents in New York, London, Tokyo, Ho Chi Minh City, or any other zone. When converting a date back to a timestamp, you specify which timezone the date input is in so the conversion produces the correct absolute time in UTC.
Each conversion produces multiple output formats side by side. The UTC date and time is shown in a simple, readable format. The ISO 8601 string includes timezone offset and is suitable for use in APIs, databases, and configuration files. The RFC 2822 format matches what you see in email headers and HTTP responses. A relative time indicator shows how long ago or how far in the future the timestamp is, which is useful for quickly assessing the age of a log entry or token.
JWT tokens contain three timestamp claims: iat (issued at), exp (expiry), and sometimes nbf (not before). These are all Unix timestamps in seconds. When a token is rejected as expired, the fastest way to understand why is to paste the exp value here and see exactly when it expired. Similarly, API rate limit headers often include a X-RateLimit-Reset value as a Unix timestamp indicating when the limit resets.
The world clock section at the bottom of the converter shows the current time in eight major timezones simultaneously, updating every second. This is useful when you need to schedule a meeting across multiple timezones, verify that a timestamp falls within business hours in a specific region, or simply orient yourself when working with global systems.