Timestamp Converter
Convert Unix epoch timestamps to human dates and convert dates back to epoch seconds or milliseconds locally.
🔒 Runs entirely in your browser — nothing is uploadedWhat Timestamp Converter does
Timestamp Converter translates Unix epoch values into human-readable dates and turns selected local dates back into epoch seconds and milliseconds. Timestamps appear in logs, API payloads, database rows, cache records, scheduled jobs, and JWT claims such as exp, iat, and nbf. Showing local time, UTC, seconds, and milliseconds together makes timezone and unit mistakes easier to spot.
This page is designed for everyday developer work: quick checks while debugging, preparing small examples for documentation, and cleaning up data before pasting it into an editor, terminal, issue, or test fixture. The interface keeps the input, controls, output, and status message close together so the result is easy to verify before you copy it.
Private browser-based workflow
All processing happens with in-browser JavaScript. The tool does not upload your text, tokens, URLs, snippets, or generated values to a server, and it does not require an account. That privacy model is important because small utilities often receive real API responses, configuration samples, logs, authentication data, or customer-shaped examples during troubleshooting. Keeping the work local reduces risk and also makes the tool feel instant because there is no network round trip.
Practical tips
Epoch seconds are common in Unix tools and JWTs, while JavaScript Date values usually use milliseconds. This tool treats values with ten or fewer digits as seconds and longer values as milliseconds. Always compare the UTC output when debugging cross-timezone behavior, especially near daylight saving time changes or midnight boundaries.
Always review transformed output before relying on it in production. Browser utilities are excellent for inspection and preparation, but they cannot understand every project convention or security requirement. If the result will be committed, shared publicly, or used in an authentication flow, double-check that it contains no secrets and that it matches the format expected by your application.
How to use
- Enter timestampPaste epoch seconds or milliseconds.
- Or choose dateUse the date picker to create epoch values.
- CompareReview local, UTC, seconds, and milliseconds.