Developer
Timestamp Converter
- Browser-based
- No signup
Convert Unix timestamps to readable dates, or pick a date and time to get Unix seconds and milliseconds. Auto-detect chooses seconds or milliseconds, and results include ISO 8601 UTC, local time, and a relative phrase. Conversion runs in your browser.
100% Client-Side
Your data never leaves your computer.
How to use this tool
1. Paste source text, code, or data into the Timestamp Converter input panel. 2. Choose transform or validation options shown for Timestamp Converter. 3. Run Timestamp Converter or read automatic output. 4. Review errors or diff output carefully. 5. Copy the transformed result. Processing runs in your browser; inputs are not uploaded to our server.
Worked example
Example: paste a small sample input into Timestamp Converter, run the transform or validation, and compare the output with the before text—fix any syntax errors reported before copying.
How it works
Choose Timestamp or Date & time. Paste a Unix timestamp (seconds or milliseconds, with auto-detect) or pick a local date and time. The tool shows Unix seconds, milliseconds, ISO 8601 UTC, local and UTC strings, and a relative time. Use Now fills the current moment. All conversion runs in your browser.
Limitations
Results are based on the inputs you provide and may not cover every edge case. This tool is for general use and is not professional advice.
Privacy and file handling
Your data is processed in your browser and is not uploaded to our server.
Frequently asked questions
How does auto-detect choose seconds or milliseconds?
Values with an absolute magnitude of 100 billion or more are treated as milliseconds. Smaller values are treated as seconds. You can override this with the Unit control.
What date formats are shown?
You get Unix seconds, Unix milliseconds, ISO 8601 UTC, a UTC string, your local date and time, and a relative phrase such as 2 hours ago.
Is my input stored?
No. Conversion runs locally in your browser and values are not stored.
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