Hex Timestamp Converter
Convert a hexadecimal Unix timestamp (base-16 epoch seconds) to a readable date and back — handy for logs, cookies and firmware.
UTC / GMT
Your local time
ISO 8601
Relative
Unix seconds
Unix milliseconds
Current time updating:
How it works
A hex timestamp is simply Unix seconds written in base-16. The tool parses the hex string to a decimal number, multiplies by 1000, and formats the date.
Enter a value to convert it to a human-readable date, or click Use current time. Conversion is two-way and runs entirely in your browser.
Frequently asked questions
Why are timestamps stored in hex?
Hexadecimal is compact and aligns with how bytes are laid out in memory, so logs, cookies and embedded devices often store the epoch in base-16.
6553f100 is the same instant as 1700000000.How do I read it?
Convert the hex to decimal, then treat it as Unix seconds. This tool does both steps for you.