Unix Timestamp Converter
convert between unix timestamps and human-readable dates. supports batch processing, detailed analysis, and multiple formats.
quick actions
timestamp to date
auto-detects format • supports decimals • live conversion
Use the converter above to process individual timestamps
Switch to Batch tab for bulk processing
Quick Refs
How to Convert Unix Timestamps
- 1
Enter a timestamp or date
Paste a Unix timestamp (seconds or milliseconds since epoch) to convert it to a human-readable date, or pick a date and time to get the corresponding timestamp.
- 2
Auto-detected precision
The tool automatically detects whether your input is in seconds (10 digits) or milliseconds (13 digits) and converts accordingly.
- 3
Review the conversion
See the result in multiple formats at once: ISO 8601, RFC 2822, relative time ("3 hours ago"), and your local timezone alongside UTC for easy cross-reference.
- 4
Batch convert if needed
Paste multiple timestamps (one per line) to convert them all at once. This is ideal for parsing log files, database exports, or API response histories.
Key Features
Bidirectional Conversion
Convert Unix timestamps to human-readable dates and vice versa. Supports seconds, milliseconds, and microsecond precision.
Timezone Awareness
Displays results in both UTC and your local timezone simultaneously, eliminating confusion when working with distributed systems across time zones.
Batch Processing
Convert multiple timestamps at once by pasting them line by line, saving significant time when analyzing logs or database dumps.
Multiple Output Formats
See results in ISO 8601, RFC 2822, relative time, local format, and other predefined formats so you can copy exactly what your application expects.
Current Time Quick-Fill
Instantly populate the current Unix timestamp with one click, useful as a quick reference when debugging time-sensitive code.
Entirely Client-Side
All conversions happen in your browser. No data is transmitted, making this safe for timestamps from private logs or security-sensitive systems.
When to Use a Unix Timestamp Converter
Unix timestamps appear everywhere in software development—database records, API responses, JWT tokens, log files, cron schedules, and cache expiration headers. While machines read epoch integers effortlessly, humans need them translated into calendar dates and clock times. This tool bridges that gap instantly, showing you exactly when an event occurred without writing throwaway conversion code.
Debugging time-related bugs is one of the most common use cases. When a user reports an issue at a certain time and your logs record events as epoch milliseconds, you need fast, reliable conversion. Batch mode lets you paste an entire column of timestamps from a database query and see all the corresponding dates at a glance, dramatically speeding up incident investigation.
The tool is equally valuable for building time-based features. When setting token expiration, cache TTLs, or scheduled job intervals, you can verify that the timestamp you are about to write into code actually corresponds to the intended date and time. Timezone display helps prevent the classic off-by-N-hours mistake when a server is in UTC but you are thinking in local time.
Frequently Asked Questions
What is a Unix timestamp?
A Unix timestamp (also called epoch time) is the number of seconds that have elapsed since January 1, 1970 00:00:00 UTC, not counting leap seconds. It is the standard way computers represent points in time as a single integer, used across virtually all operating systems and programming languages.
How do I tell if a timestamp is in seconds or milliseconds?
A seconds-based timestamp (e.g., 1712600000) has 10 digits and represents a date in the current era. A milliseconds-based timestamp (e.g., 1712600000000) has 13 digits. The tool auto-detects the precision based on the number of digits.
Does this tool handle dates before 1970?
Yes. Dates before the Unix epoch are represented as negative timestamps. Enter a negative number and the tool will correctly convert it to dates before January 1, 1970. For example, -86400 corresponds to December 31, 1969.
Can I convert timestamps from log files?
Absolutely. Use the batch processing mode to paste multiple timestamps from log files, one per line. The tool converts them all simultaneously and displays the results in a list you can copy for further analysis.
Is the conversion affected by my local timezone?
The tool always shows both UTC and your browser local timezone for every conversion. The underlying timestamp is timezone-agnostic (it always counts from UTC epoch), but the human-readable display adapts to your location so you can see both perspectives.
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