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.
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 any Unix timestamp to convert to date. Below 1e12 = seconds; above = milliseconds. Outputs Unix seconds, Unix milliseconds, ISO 8601 UTC, and local time.
- Leave input blank to generate timestamp online using your device clock. Useful for quick 'now' checks during debugging.
- Accept ISO 8601 strings like 2026-08-23T10:00:00Z directly. Converter parses both epochs and date strings in one step.
- Add optional IANA zone (e.g., America/New_York) to see named timezone output. Pair with Timezone Converter for full region workflows.
- Discord timestamps use Unix seconds. Paste a Discord snowflake or epoch to convert to readable date and time in your browser.
Frequently asked questions
How do I convert a Unix timestamp to date online?
Paste your Unix timestamp into the input field. The tool treats values below 1e12 as seconds and larger values as milliseconds, then outputs Unix seconds, Unix milliseconds, ISO 8601 UTC, UTC offset, and device local time instantly in your browser.
What's the difference between Unix seconds and milliseconds?
Unix Timestamp Converter uses 1e12 (1 trillion) as the threshold. Values below that are seconds since 1970-01-01 UTC; values at or above are milliseconds. Most modern APIs use milliseconds; older systems use seconds. The tool outputs both so you can see the conversion immediately.
Can I use this as a Linux timestamp converter?
Yes. Linux uses Unix timestamps (POSIX time), so this tool converts Linux timestamps to dates. Paste your Linux epoch value and optionally add an IANA time zone like America/New_York to see the result in your local timezone.
Can I convert Unix time to date with ISO 8601 strings?
Yes. The tool accepts standard ISO 8601 strings like 2026-08-23T10:00:00Z and converts them to Unix seconds, Unix milliseconds, UTC, and device local time. Useful for debugging API payloads that mix epochs and date strings.
How do I convert Discord Unix timestamps to date?
Discord uses Unix seconds in snowflakes and timestamps. Paste the Discord timestamp or snowflake ID into the converter. The tool will output the readable date and time in UTC and your device's local timezone.
What happens if I leave the input empty?
When input is blank, the tool uses your device's current clock to populate the full time bundle, Unix seconds, Unix milliseconds, ISO 8601 UTC, UTC offset, and local time. Handy for quick 'now' checks during debugging.
Does this Unix timestamp converter upload my data?
No. All conversion runs locally in your browser. Your input is never uploaded to DevToolMate servers and no account is required. Values stay on your device for the current session.
Can I convert timestamps for a specific time zone?
Yes. Provide an optional IANA time zone name (e.g., America/New_York, Europe/London) and the tool will append a named zone line to the output. For full timezone conversion workflows, pair this with the Timezone Converter tool.
Related tools
- 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.
- Unix Timestamp to Date: Convert Unix timestamp to date online instantly. Auto-detects seconds vs milliseconds. Get ISO 8601, UTC, and local time. Browser-local, no upload.
- Date to Unix Timestamp: Convert date to Unix timestamp online. Paste ISO 8601 strings or numeric timestamps; get Unix seconds and milliseconds instantly. Free, browser-local, no upload.