Math & Numbers
Run simple linear regression on paired numeric data and inspect slope, intercept, correlation, and predictions
regression-calculatorGenerator
Generate structured test data from field configuration with support for faker fields, regex rules, credit cards, IDs, and batch export
test-data-faker-builderFormat Conversion
Embed generated chart images into Excel workbooks using workbook data ranges for bar or pie chart reports
xlsx-chart-embedderFormat Conversion
Batch-apply conditional formatting rules such as threshold highlights, data bars, and color scales to Excel worksheets
xlsx-conditional-formatting-ruleFormat Conversion
Inject Excel sparklines into worksheet cells by patching XLSX sheet XML with sparkline definitions
xlsx-sparkline-injectorFormat Conversion
Fill formulas down worksheet columns and optionally lock formula cells for protected, template-friendly Excel workbooks
xlsx-formula-injectorFormat Conversion
Create or update workbook-level named ranges so formulas, validations, and reusable templates can reference stable Excel names
xlsx-named-range-injectorFormat Conversion
Apply consistent colors, fonts, borders, and header styling to Excel sheets and export branded multi-theme reports
xlsx-sheet-theme-packFormat Conversion
Batch-create dropdowns, dependent cascading dropdowns, and input prompts in Excel workbooks using data validation rules
xlsx-data-validation-dropdownFormat Conversion
Freeze top rows/left columns automatically and apply row or column outline groups for easier spreadsheet reading
xlsx-freeze-pane-managerFormat Conversion
Apply paper, margins, scaling, repeating titles, and header/footer print settings to Excel workbooks in one pass
xlsx-print-setup-packFormat Conversion
Generate professional invoice/quotation workbooks with auto totals, tax calculations, and company logo embedding
xlsx-invoice-generator