What is Text input?
Your original text, kept on this device. The tool does not modify a loaded source file.
Unix Timestamp Converter
Convert Unix seconds or milliseconds to UTC dates, or explicit-zone ISO dates to timestamps.
Preparing the tool…
The tool could not be loaded. Check your connection and try again.
No file selectedUTF-8 · Up to 1 MB
Date input must include Z or a timezone offset. Ambiguous local dates and impossible calendar dates are rejected.
How to use Unix Timestamp Converter
Enter your input
Paste text, load a UTF-8 text file or choose Try example to get started.
Choose options and run
Convert Unix seconds or milliseconds to UTC dates, or explicit-zone ISO dates to timestamps.
Copy or download
Review the result, then copy it or save the JSON file.
Frequently asked questions
How do I use Unix Timestamp Converter?
Convert Unix seconds or milliseconds to UTC dates, or explicit-zone ISO dates to timestamps. Load the example or enter your own input, choose the options, then select Run.
Can I copy or download the result?
Yes. Copy the result or download it as a JSON file after processing.
What should I know before using this tool?
Date input must include Z or a timezone offset. Ambiguous local dates and impossible calendar dates are rejected.
Is my input uploaded or saved?
No. Processing runs on this device. Inputs and results are not uploaded or saved by this tool.
About Unix Timestamp Converter
Here is what each format is for, and when converting input into a useful result is the right move.
What is Processed result?
Convert Unix seconds or milliseconds to UTC dates, or explicit-zone ISO dates to timestamps.
When you need it
Date input must include Z or a timezone offset. Ambiguous local dates and impossible calendar dates are rejected.