Timestamp Converter — Unix Timestamp to Date | GadgetSurge

About Timestamp Converter

A Unix timestamp (also called Epoch time) is the number of seconds that have elapsed since 00:00:00 UTC on 1 January 1970. It is the universal standard for representing moments in time in software — used in databases, APIs, log files, JWT tokens, and file systems across every platform and programming language.

This free timestamp converter works in both directions: paste a Unix timestamp to get a human-readable date and time, or enter a date to get the corresponding Unix timestamp. It supports both second-precision and millisecond-precision timestamps, which are common in JavaScript APIs.

Timestamps are timezone-independent by definition — a Unix timestamp represents the same moment in time regardless of where you are. The converter shows both the UTC time and the local time in your selected timezone so you can verify the exact moment being represented.

Common situations where you need a timestamp converter include debugging JWT expiry claims (the exp field is a Unix timestamp), reading database created_at fields, interpreting API rate limit reset times, and working with log files that use numeric timestamps.

How to Use Timestamp Converter

1. Enter a Unix timestamp (in seconds or milliseconds) to convert it to a human-readable date.
2. Or enter a date and time to convert it to a Unix timestamp.
3. Select your timezone to see the local equivalent.
4. Copy the result with the Copy button.

Common Use Cases

• Debugging JWT tokens: Convert the exp, iat, and nbf claims in JWT payloads from Unix timestamps to readable dates to check expiry times.
• Reading API responses: Many APIs return timestamps as Unix epoch values. Convert them to understand when an event occurred or when a resource expires.
• Log file analysis: Server and application logs often use Unix timestamps. Convert them to local time to correlate events with real-world times.
• Database record inspection: Convert created_at, updated_at, and deleted_at timestamp columns to readable dates when inspecting database records.
• Checking rate limit resets: API rate limit headers often include a reset timestamp. Convert it to know exactly when your rate limit will lift.
• Generating timestamps for testing: Convert a specific future or past date to a Unix timestamp to use in test data, mock API responses, or scheduled jobs.

Frequently Asked Questions

What is a Unix timestamp?

A Unix timestamp is the number of seconds (or milliseconds) since January 1, 1970 00:00:00 UTC, known as the Unix Epoch. It provides a single, timezone-independent number to represent any moment in time. For example, the timestamp 1700000000 represents November 14, 2023 22:13:20 UTC.

What is the difference between seconds and milliseconds timestamps?

Unix timestamps are traditionally in seconds, giving a 10-digit number. JavaScript's Date.now() and many modern APIs return milliseconds, giving a 13-digit number. If your timestamp has 13 digits, it is in milliseconds. Divide by 1000 to convert to seconds. This converter handles both automatically.

What is the maximum Unix timestamp?

A 32-bit signed integer can store Unix timestamps up to 2147483647, which represents January 19, 2038 03:14:07 UTC. This is the "Year 2038 problem". Modern systems use 64-bit integers which can represent dates billions of years into the future.

Why do APIs use timestamps instead of date strings?

Unix timestamps are unambiguous — they represent a single moment in time regardless of timezone, locale, or date format conventions. Date strings like "01/02/03" are ambiguous (is it January 2 or February 1? 2003 or 1903?). Timestamps eliminate this ambiguity and are trivial to compare and sort.

How do I get the current Unix timestamp?

In JavaScript: Math.floor(Date.now() / 1000) for seconds, or Date.now() for milliseconds. In Python: import time; int(time.time()). In Unix shell: date +%s. This tool also displays the current timestamp in real time.