Personal file naming collision check calculator

Calculate normalized proposed names and colliding normalized names with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use normalized proposed names and colliding normalized names to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

JSON Proposed filenames after chosen rename template
["Report.txt","report.txt","photo.jpg"]
Case-insensitive filesystem rule (1=yes,0=no)
1
Normalized proposed names
["report.txt","report.txt","photo.jpg"]
Colliding normalized names
["report.txt"]
Excess names in collisions
1

Try another scenario

JSON Proposed filenames after chosen rename template
["Report.txt","report.txt","photo.jpg"]
Case-insensitive filesystem rule (1=yes,0=no)
0
Normalized proposed names
["Report.txt","report.txt","photo.jpg"]
Colliding normalized names
[]
Excess names in collisions
0
Calculation method

Calculation method

Normalized proposed names

Lowercase names only when case-insensitive flag is true; no Unicode normalization.

Colliding normalized names

Names with multiplicity greater than one.

Excess names in collisions

Sum(group count−1).

Symbols and units
a
JSON Proposed filenames after chosen rename template
b
Case-insensitive filesystem rule (1=yes,0=no)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Rename-template results supplied explicitly; exact case folding limited to lowercase Unicode behavior of Python str.lower. No filesystem mutation, reserved-name or normalization audit. Supported limits: Up to 1000 proposed names. Case flag must be boolean or exactly 0/1.
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