Online Timestamp Converter
Convert between Unix timestamps and dates with multi-format output. 100% private, all processing in your browser
Two-Way Convert
Timestamp to date and back
Privacy First
Your data never leaves your device
Multi-Format
ISO, local, UTC, relative
Auto Detect
Seconds vs milliseconds
Frequently Asked Questions
What is a Unix timestamp?
A Unix timestamp is the number of seconds (or milliseconds) since January 1, 1970 UTC. It is widely used in programming and databases.
Will my data be uploaded to a server?
No. All conversion is done locally in your browser. Your input never leaves your device, fully protecting your privacy.
Does it auto-detect seconds vs milliseconds?
Yes. The tool auto-detects based on the digit count: 10 digits are treated as seconds, 13 digits as milliseconds.
What output formats are available?
ISO 8601, local time, UTC, and a human-readable relative time (e.g. '2 hours ago') are all displayed simultaneously.
Can I convert a date to a timestamp?
Yes. Use the date picker to select any date and time, and the corresponding Unix timestamp is generated instantly.
Is this tool free to use?
Completely free. This is a pure frontend online tool - no registration required, no payment needed, just open and use.
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