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Windows FILETIME Converter

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

Mode

Input

Result

Type or paste on the left — the result updates as you type.

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.

Format references

Tool page updated: