Timestamp Converter
Convert Unix timestamp to date online in your browser. Free tool outputs seconds, milliseconds, ISO 8601 UTC, and local time. No upload, no account, no server processing.
Runs locally in your browser. Your input is not uploaded to DevToolMate servers.
Seconds vs milliseconds
Absolute values below 1e12 are treated as seconds. Larger values are treated as milliseconds.
Developer Quick Tips
- Paste Unix timestamp or ISO 8601 string; tool outputs seconds, milliseconds, ISO 8601 UTC, UTC offset, and device local time instantly.
- Values below 1e12 are seconds; larger values are milliseconds. Tool shows both so you verify the right format.
- Leave input empty to convert your device's current time to Unix epoch and all formats instantly.
- All conversion runs locally in your browser; your timestamp never leaves your device.
- Accepts Linux timestamps, ISO 8601 strings with Z or UTC offset, and numeric Unix values in seconds or milliseconds.
Frequently asked questions
How do I convert a Unix timestamp to date online?
Paste your Unix timestamp (seconds or milliseconds) or ISO 8601 string into the input field. Timestamp Converter processes it locally in your browser and outputs Unix seconds, Unix milliseconds, ISO 8601 UTC, UTC offset, and device local time instantly.
Can I convert a Linux timestamp to date?
Yes. Linux timestamps are Unix timestamps (seconds since Jan 1, 1970 UTC). Paste your Linux timestamp into Timestamp Converter and it will output the date in ISO 8601, local time, and other formats, all in your browser.
What's the difference between Unix seconds and milliseconds?
Unix seconds count from Jan 1, 1970 UTC (e.g., 1725436800). Unix milliseconds multiply by 1000 (e.g., 1725436800000). Timestamp Converter treats values below 1e12 as seconds and larger values as milliseconds, then outputs both formats so you can verify.
How do I convert Unix timestamp to date with a UTC offset?
Timestamp Converter accepts ISO 8601 strings with UTC offset (e.g., 2024-09-12T14:30:00+02:00) and outputs the corresponding Unix timestamp, ISO 8601 UTC, and your device's local time. All conversion runs in your browser.
How do I generate the current timestamp online?
Leave the input field empty and click convert. Timestamp Converter will use your device's current time and output it as Unix seconds, Unix milliseconds, ISO 8601, and local time.
What is an epoch and how do I convert epoch to date?
Epoch is the Unix epoch: Jan 1, 1970 00:00:00 UTC. Unix timestamps count seconds or milliseconds from that moment. Paste any epoch value into Timestamp Converter and it outputs the corresponding date in ISO 8601, UTC offset, and your device's local time.
Does Timestamp Converter support RFC 3339 and ISO 8601 formats?
Yes. Timestamp Converter accepts ISO 8601 strings with Z (UTC) or UTC offset (e.g., 2024-09-12T14:30:00Z or 2024-09-12T14:30:00+02:00) and outputs ISO 8601 UTC. RFC 3339 is a profile of ISO 8601, so RFC 3339 timestamps are supported.
Is Timestamp Converter free and does it upload my data?
Yes, it is free with no account required. All conversion runs locally in your browser. Your input is never uploaded to DevToolMate servers.
Related tools
- Unix Timestamp Converter: Convert Unix timestamp to date online, free and browser-local. Handles seconds, milliseconds, ISO 8601, negative epochs, and Discord timestamps. No upload, no account.
- ISO 8601 Converter: ISO 8601 converter: transform Unix timestamps and dates to UTC format online. Browser-local, no upload, no account. Handles seconds, milliseconds, RFC 3339.