Filename Extension Inspector

Separate the final extension from a filename, normalize its case, and include the matching MIME type when the local lookup table recognizes the format.

About this tool

Separate the final extension from a filename, normalize its case, and include the matching MIME type when the local lookup table recognizes the format. All processing runs locally in this browser session. Enter the requested values in the fields below and run the calculation to see a structured result that can be copied for your records. Review the stated assumptions before applying financial or date estimates to a real decision.

How to use this tool

  1. Enter the required values.
  2. Review the assumptions and input units.
  3. Run the tool and copy the result.

How it works

Filename Extension Inspector applies the documented calculation to your input and returns the values shown in its result.

When to use this tool

  • Quick filename extension inspector estimates
  • Local data checks without uploading source text

Limitations

Filename Extension Inspector depends on the stated units and assumptions; it does not replace professional review.

Privacy

All Filename Extension Inspector processing occurs locally in this browser session; input is not uploaded by this tool.