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Windows FILETIME Converter

Convert Windows FILETIME 100-nanosecond ticks to ISO UTC and back without losing the sub-millisecond part.

Convert in your browser · No sign-up

FILETIME starts at 1601-01-01 UTC. ISO input requires Z and allows up to seven fractional digits; negative FILETIME values are rejected.

Up to 100,000 UTF-16 units per input and 1,000,000 per result. See the supported formats and examples below.

Result

Add your input or load an example, then run the tool. Your result will appear here.

How to use

  1. Convert Windows FILETIME 100-nanosecond ticks to ISO UTC and back without losing the sub-millisecond part.
  2. Choose the mode or options, then run the tool.
  3. Review the result, then copy or download the TXT file.

Example

116444736000000000 ⇄ 1970-01-01T00:00:00.0000000Z

Details and limitations

Text stays in your browser; it is not sent to a conversion server.

Format references

Tool page updated: