What to select
Enter Unix seconds, Unix milliseconds or an ISO 8601 date. Leave the input blank to use the current time.
Unix Timestamp Converter
Convert Unix seconds, milliseconds and ISO dates in your browser time zone.
We use reasonable safeguards to help protect your files and information while you use the service.
0 characters · 0 UTF-8 bytes. Up to 1,000,000 characters. Processing stays in this browser.
What this developer tool does
Convert Unix seconds, Unix milliseconds, ISO 8601, and other browser-recognized dates into UTC and local representations.
How to use Unix Timestamp Converter
- Enter a timestamp or date, or leave the field blank for the current time.
- Convert the value.
- Review Unix seconds, milliseconds, UTC, local time, and the browser time zone.
Example
Unix timestamp 0 is 1970-01-01T00:00:00.000Z.
Practical note: Dates without an explicit offset can be interpreted in the browser's local time zone; include Z or an offset when precision matters.
Supported formats
Plain text, JSON, XML, standard or URL-safe Base64, URL components, UUID v4, secure passwords, SHA-256, SHA-384, SHA-512 and CRC32.
Limits and safety
Text input is limited to 1,000,000 characters per task, UUID generation to 100 values, and passwords to 8–128 characters.
Frequently asked questions
Is my input uploaded or saved?
No. These developer utilities process input only in this browser tab.
Can a generated hash be reversed?
No. Cryptographic hashes are one-way values. CRC32 is a checksum for detecting accidental changes, not a security hash.