Business Compliance Tools

Formula injection checker

Formula injection checker is a free browser tool that produces formal PDF and editable DOCX review reports from all source headers and cells and saved XLSX formula expressions. A flagged value is a potential spreadsheet interpretation risk, not proof of a malicious payload.

Free. No account or payment needed.

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What does the formula injection checker produce?

Inspect every supplied header and cell for formula-triggering prefixes, hidden leading characters and previously escaped values. Inspect saved XLSX formulas without executing them.

The working area above runs the supported validator in the browser. It keeps the result inspectable and preserves every unresolved item for responsible review.

What do you need before you start?

  • Prepare one comma-separated UTF-8 CSV, one-sheet text-cell XLSX starting at A1, or rectangular dataset JSON.
  • Keep the unchanged original source and confirm the intended destination application.
  • Review unresolved interpretations before using any date, export cell or package name.

What information do you enter?

Prepare only the bounded inputs listed below for this validator.

  • All source headers and cells, inspected by position.
  • Saved XLSX formula expressions, represented as inert review text.
  • At most 5000 data rows, 50 columns, 100000 cells and 5000000 parsed characters.

What you can download

Every result must identify its supplied facts, assumptions and unresolved items.

Free resultIncluded downloads

Enter your information, inspect the on-screen result and keep a browser backup.

Editing and direct copies of your entered information stay free.

  • Formal PDF and editable DOCX review reports
  • Excel checks and escaped source previews
  • Complete findings CSV
  • Complete parsed source and result JSON
  • Delivered-file SHA-256 manifest and review instructions
  • Unchanged original source download

These supported outputs are free. No checkout is required.

Fictional review report (PDF). Editable sample (DOCX). Complete fictional pack (ZIP). Requires tailoring and responsible review. Samples use the free finalized pack renderer.

How does the formula injection checker work?

  1. 1
    Select a local source

    Choose one supported file or load the clearly fictional example. Source files remain unchanged.

  2. 2
    Inspect supported checks

    Inspect every supplied header and cell for formula-triggering prefixes, hidden leading characters and previously escaped values. Inspect saved XLSX formulas without executing them.

  3. 3
    Review unresolved items

    Inspect escaped previews, source-row pointers and complete result downloads. Confirm the intended interpretation separately.

  4. 4
    Download the free review pack

    Download PDF, DOCX, Excel, CSV, complete parsed source JSON, delivered-file hashes and instructions. Keep the original source separately.

Common questions

What information does the formula injection checker need?

Enter all source headers and cells, inspected by position; saved XLSX formula expressions, represented as inert review text; at most 5000 data rows, 50 columns, 100000 cells and 5000000 parsed characters. Prepare one comma-separated UTF-8 CSV, one-sheet text-cell XLSX starting at A1, or rectangular dataset JSON.

What does the formula injection checker produce?

Formal PDF and editable DOCX review reports Excel checks and escaped source previews Complete findings CSV Complete parsed source and result JSON Delivered-file SHA-256 manifest and review instructions Unchanged original source download Review unresolved findings and limitations before use.

Who makes the final decision?

A responsible person reviews the result. A flagged value is a potential spreadsheet interpretation risk, not proof of a malicious payload. Negative numbers can be flagged. No universal CSV escaping method is guaranteed across spreadsheet applications or repeated save and reopen operations. Macros, links and destination application behavior require separate review.

Is this tool free?

Yes. The on-screen result and listed downloads are free. No checkout is required. Keep local backups and review the stated method and limits.

Can I use the formula injection checker for this task?

Identify dangerous spreadsheet export content. A flagged value is a potential spreadsheet interpretation risk, not proof of a malicious payload. Negative numbers can be flagged. No universal CSV escaping method is guaranteed across spreadsheet applications or repeated save and reopen operations. Macros, links and destination application behavior require separate review.

What still needs review?

A flagged value is a potential spreadsheet interpretation risk, not proof of a malicious payload. Negative numbers can be flagged. No universal CSV escaping method is guaranteed across spreadsheet applications or repeated save and reopen operations. Macros, links and destination application behavior require separate review.

Previews are abridged after 400 characters. PDF and DOCX show the first 100 assessments. Complete results and parsed values remain in Excel, CSV and JSON.

Original files stay in this browser. Download original source preserves its bytes. Restore it through Select file.