Unix Timestamp Converter
Convert a Unix timestamp to a human date and back — in seconds (on-chain block.timestamp) or milliseconds.
A Unix timestamp counts the seconds since January 1, 1970 UTC. On-chain values like block.timestamp and vesting cliffs are in seconds, while JavaScript dates are in milliseconds. This tool converts a timestamp to a readable UTC and local date (and back), making the seconds-vs-milliseconds distinction explicit so you avoid the classic 1000× error.
Unix time (or epoch time) is a single integer: the number of seconds elapsed since the Unix epoch, 00:00:00 UTC on 1 January 1970. It is timezone-independent, which makes it the standard for storing instants in databases and on blockchains.
The most common bug when working with timestamps is mixing units. Solidity's block.timestamp is in seconds, but JavaScript's Date works in milliseconds — off by a factor of 1000. This converter asks you which unit you mean, so a vesting cliff or unlock time is never misread by three orders of magnitude.
For token launches, timestamps drive cliff dates, vesting unlocks, and sale windows. Converting them to a readable date up front catches mistakes before they are written into a contract.
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