File Hash Calculator
Calculate SHA-256 for a local file without uploading it.
CSV Formula Risk Checker
Locate CSV cells beginning with spreadsheet formula prefixes.
Processed locally in your browser.
Loading your workspace…
How to use CSV Formula Risk Checker
- Choose Example to see valid input, or enter your own data.
- Run the tool and review the result. Invalid inputs show a helpful error.
- Copy or download the output, or use Reset to clear the workspace.
Practical example
name,value Ada,=1+1
Common question
What should I know before using this tool?
Flags = + - @ or leading control whitespace. Some legitimate values, including negatives, may be flagged. This is a heuristic, not a safety guarantee.
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