Timestamp Batch Converter

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Timestamp Converter

Convert between Unix timestamps and human-readable dates. Current timestamp shown live.

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Example

Convert mixed timestamp values

Auto mode detects common 10-digit seconds and 13-digit millisecond timestamps.

Input


                        1700000000
1700000000000
2026-06-08T12:00:00Z

Output


                        Each line is converted into UTC, local, ISO, seconds, and milliseconds columns.

Practical Notes

A 10-digit Unix timestamp is usually seconds. A 13-digit value is usually milliseconds.
Unix timestamps represent a UTC moment. Local time only changes how that moment is displayed.
Use the single Timestamp Converter when you need live current time or one detailed conversion.

How to Use

1. Paste one timestamp or date string per line.
2. Choose auto-detect, seconds, milliseconds, or date string mode.
3. Click Convert Batch to produce a table and CSV output.
4. Copy the CSV when you need to move the results into a spreadsheet or ticket.

Features

Converts many timestamp values in one pass
Auto-detects seconds, milliseconds, and readable date strings
Outputs UTC, local time, ISO, Unix seconds, and milliseconds
Exports copy-ready CSV for spreadsheets and debugging notes
Handles blank lines and labels safely
Runs locally in your browser

Use Cases

Reviewing many API timestamps from logs or database exports
Checking seconds vs milliseconds mistakes in bulk
Preparing timestamp examples for documentation
Comparing UTC and local display values before debugging time-zone issues

Frequently Asked Questions

Can this convert both seconds and milliseconds?

Yes. Auto mode treats large numeric values as milliseconds and smaller Unix-style values as seconds. You can also force seconds or milliseconds manually.

Can I paste ISO date strings?

Yes. Auto mode and Date string mode can parse values such as 2026-06-08T12:00:00Z when the browser Date parser supports the format.

Does this handle time zones?

It displays each converted moment in UTC and in your browser local time. Date strings with explicit offsets are interpreted according to that offset.

Is my timestamp data uploaded?

No. Batch conversion runs locally in your browser.