# XLSX Formula Injector

Fill formulas down worksheet columns and optionally lock formula cells for protected, template-friendly Excel workbooks

> Canonical page: https://elysiatools.com/en/tools/xlsx-formula-injector

- **Category:** Format Conversion

- **Keywords:** xlsx, excel, formula, lock cells, sheet protection, template, exceljs

## Overview

Inject formulas into workbook columns at scale.

- Fill formulas down one or many columns using row placeholders
- Copy styling or number formats onto generated formula cells
- Lock formula cells and optionally hide formulas
- Combine with protected sheets and editable input ranges

## Inputs

- **Workbook File** (file)
- **Formula Rules JSON** (textarea): \[ { "sheetName": "Sheet1", "targetColumn": "D", "startRow": 2, "endRow": 100, "formulaTemplate": "=IF($A{{row}}="","",$B{{row}}*$C{{row}})", "numberFormat": "#,##0.00", "styleSourceRow": 2 } \]
- **Editable Ranges JSON** (textarea): \[ { "sheetName": "Sheet1", "range": "A2:C100" } \]
- **Protect Touched Sheets** (checkbox)
- **Lock Formula Cells** (checkbox)
- **Hide Formula Text** (checkbox)
- **Sheet Protection Password** (text): Leave blank for no password

## When to use

- When you need to apply the same complex formula across thousands of rows in a standardized report.
- When creating Excel templates where you want to lock calculated cells while keeping input fields editable.
- When you need to hide sensitive logic or proprietary formulas from end-users by locking and masking cells.

## How it works

- Upload your Excel workbook and define your formula logic using a JSON configuration.
- Use the {{row}} placeholder in your formula template to dynamically reference specific rows.
- Specify editable ranges to keep input cells unlocked while protecting the rest of the sheet.
- Apply sheet protection and formula locking to finalize your template for distribution.

## Use cases

- Standardizing financial reporting templates by injecting automated tax or margin calculations.
- Preparing large-scale data entry forms where users can only input data in specific, unlocked columns.
- Distributing protected pricing sheets where formulas are hidden and locked to prevent tampering.

## Frequently asked questions

### Can I use this tool to protect my formulas?

Yes, by enabling 'Lock Formula Cells' and 'Protect Touched Sheets', you can prevent users from editing or viewing your formulas.

### What is the {{row}} placeholder?

It is a dynamic variable that the tool replaces with the current row number during the injection process, allowing formulas to reference correct cells.

### Can I keep some cells editable while locking others?

Yes, use the 'Editable Ranges JSON' option to define specific cell ranges that remain unlocked even when sheet protection is active.

### Does this tool support password protection?

Yes, you can provide a 'Sheet Protection Password' to restrict access to the protected areas of your workbook.

### Can I copy formatting from existing cells?

Yes, by specifying a 'styleSourceRow' in your configuration, the tool will apply the formatting from that row to your newly injected formula cells.

## Related tools

- [XLSX Column Mapper](https://elysiatools.com/en/tools/xlsx-column-mapper): Rename, reorder, and drop Excel columns with alias matching and case/whitespace normalization
- [XLSX Print Setup Pack](https://elysiatools.com/en/tools/xlsx-print-setup-pack): Apply paper, margins, scaling, repeating titles, and header/footer print settings to Excel workbooks in one pass
- [XLSX Template Filler](https://elysiatools.com/en/tools/xlsx-template-filler): Fill existing styled/formula Excel templates by replacing {{variable}} placeholders only
- [XLSX Chart Embedder](https://elysiatools.com/en/tools/xlsx-chart-embedder): Embed generated chart images into Excel workbooks using workbook data ranges for bar or pie chart reports
- [XLSX Conditional Formatting Rule](https://elysiatools.com/en/tools/xlsx-conditional-formatting-rule): Batch-apply conditional formatting rules such as threshold highlights, data bars, and color scales to Excel worksheets
- [XLSX Data Validation Dropdown](https://elysiatools.com/en/tools/xlsx-data-validation-dropdown): Batch-create dropdowns, dependent cascading dropdowns, and input prompts in Excel workbooks using data validation rules
- [XLSX Freeze Pane Manager](https://elysiatools.com/en/tools/xlsx-freeze-pane-manager): Freeze top rows/left columns automatically and apply row or column outline groups for easier spreadsheet reading
- [XLSX Named Range Injector](https://elysiatools.com/en/tools/xlsx-named-range-injector): Create or update workbook-level named ranges so formulas, validations, and reusable templates can reference stable Excel names

## Samples

- [XLSX Samples](https://elysiatools.com/en/samples/xlsx-samples): Sample XLSX spreadsheets for worksheet parsing and data extraction testing
- [XLS Samples](https://elysiatools.com/en/samples/xls-samples): Sample legacy Excel (XLS) files for binary spreadsheet parsing and import tests
- [Android Serialization Java Samples](https://elysiatools.com/en/samples/android-serialization-java): Android Java serialization examples including JSON serialization, deserialization, and XML parsing
- [Android Serialization Kotlin Samples](https://elysiatools.com/en/samples/android-serialization-kotlin): Android Kotlin serialization examples including JSON serialization, deserialization, and XML parsing