▤Free
Spreadsheet formula guard
Prefix risky spreadsheet cells before exporting CSV.
Prefix risky spreadsheet cells before exporting CSV. Add a leading apostrophe to cells beginning with common spreadsheet formula triggers. CSV quoting is preserved while the rule checks leading spaces, tabs and carriage returns.
How to use
- Enter your text, values, or image.
- Adjust the options and run the tool.
- Copy or download your result.
Worked example
Example input
Input: name,value a,=1+1
Example result
name,value a,'=1+1
Limitations and details
Spreadsheet import behavior varies; this selected-prefix rule is not a guarantee against every formula-injection technique.
Inputs and options
- Input
- Text
Frequently asked questions
Is this tool free and private?
Yes. All 300 tools are free in this phase. Processing happens in your browser; your input and files are not sent to our servers.