Timestamp Converter
Convert Unix timestamp to human-readable date and vice versa
Timestamp to Date
Date to Timestamp
Common Timestamp Formats
Unix Timestamp
Seconds since Jan 01 1970. (e.g. 1672531200)
JavaScript Date
Milliseconds since Jan 01 1970. (e.g. 1672531200000)
ISO 8601
YYYY-MM-DDTHH:mm:ss.sssZ
RFC 2822
Wed, 01 Jan 2023 00:00:00 +0000
Convert Unix timestamps to human-readable dates and vice versa instantly. Essential for debugging application logs, working with time-series databases, interpreting API responses, and understanding epoch-based time values across different timezones.
Unix Timestamps and Epoch Time Explained for Application Developers
A Unix timestamp (also called epoch time or POSIX time) is an integer representing the number of seconds that have elapsed since January 1, 1970, 00:00:00 UTC — a reference point known as the Unix epoch. Millisecond-precision timestamps divide the elapsed time into thousandths of a second, yielding values 1,000 times larger. The Unix timestamp format has become the universal standard for storing and transmitting time values in software because it is timezone-independent, compact, easily comparable with simple arithmetic, and natively supported by every programming language and database system.
Despite their ubiquity, Unix timestamps are not human-readable — `1709827200` tells a developer nothing useful until converted. This conversion step is where bugs frequently hide: confusing seconds with milliseconds (a 1000× difference), applying the wrong timezone offset, or misunderstanding how DST transitions affect local time calculations.
This timestamp converter handles all common scenarios: converting Unix seconds or milliseconds to local time, UTC, and formatted human-readable strings; converting date strings back to Unix timestamps; displaying the current timestamp in real-time; and annotating edge cases like the Y2K38 problem (32-bit integer overflow on January 19, 2038). Multiple output formats support ISO 8601, RFC 2822 (email headers), and natural language representations.
Debugging Application and Server Logs
Convert numeric timestamps in log files, error reports, and monitoring dashboards to readable dates so you can correlate incidents with specific events without doing mental epoch math.
Working with Time-Based APIs and JSON Responses
API responses commonly return `created_at`, `updated_at`, and `expires_at` as Unix timestamps. Convert them instantly to understand when records were created or when tokens and sessions expire.
Setting Expiration Times for Caches and Tokens
Calculate the correct Unix timestamp for 'one hour from now', 'midnight UTC', or 'end of day in EST' to use in cache TTLs, JWT `exp` claims, and session cookie expiration values.
Cross-Timezone Scheduling and Event Planning
Convert a Unix timestamp to multiple timezone representations simultaneously for coordinating releases, incidents, and meetings across globally distributed development teams.
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Enter a Unix Timestamp or Select a Date
Paste a Unix timestamp (in seconds or milliseconds) into the timestamp field, or click the date/time picker to select a specific moment. The tool auto-detects whether the input is in seconds (10 digits) or milliseconds (13 digits).
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View the Converted Output in Multiple Formats
Results display instantly in your local timezone, UTC, ISO 8601 (e.g., `2024-03-08T12:00:00Z`), RFC 2822, Unix seconds, Unix milliseconds, and a natural language description like 'March 8, 2024 at 12:00 PM UTC'.
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Select Your Timezone for Local Time Display
Use the timezone dropdown to view the converted timestamp in any IANA timezone (e.g., America/New_York, Europe/London, Asia/Tokyo), accounting for DST transitions automatically.
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Copy the Result in Your Preferred Format
Click the copy button next to any output field to transfer that specific format to your clipboard — useful for pasting ISO timestamps into database queries or Unix values into configuration files.
Automatic Seconds vs. Milliseconds Detection
The tool intelligently distinguishes between 10-digit Unix timestamps (seconds) and 13-digit timestamps (milliseconds) — a common source of off-by-1000 errors in applications that mix timestamp formats.
Multiple Output Formats Simultaneously
Displays the converted value in ISO 8601, RFC 2822, UTC, local time, and human-readable relative format (e.g., '3 days ago', 'in 5 hours') all at once, so you can grab whichever representation your use case requires.
Global Timezone Support with DST Awareness
Full IANA timezone database support (600+ timezones) with automatic daylight saving time adjustments, so converting historical timestamps from any timezone produces accurate local time values.
Real-Time Current Timestamp Display
The current Unix timestamp (in both seconds and milliseconds) is shown live and updates every second, giving you an accurate value to copy directly into code, curl commands, or database inserts.
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