All-in-One Tools Collection

A broad collection of online tools for development, AI, design, and productivity tasks.

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Infer JSON Schema from sample JSON, optionally merge manual schema edits, and validate data against the active schema

Generate a runnable Redis-backed mock API server with 1-hour TTL, hot updates, and dynamic templated responses

Inject Excel sparklines into worksheet cells by patching XLSX sheet XML with sparkline definitions

Embed generated chart images into Excel workbooks using workbook data ranges for bar or pie chart reports

Batch-apply conditional formatting rules such as threshold highlights, data bars, and color scales to Excel worksheets

Create or update workbook-level named ranges so formulas, validations, and reusable templates can reference stable Excel names

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

Apply consistent colors, fonts, borders, and header styling to Excel sheets and export branded multi-theme reports

Apply paper, margins, scaling, repeating titles, and header/footer print settings to Excel workbooks in one pass

Batch-create dropdowns, dependent cascading dropdowns, and input prompts in Excel workbooks using data validation rules

Freeze top rows/left columns automatically and apply row or column outline groups for easier spreadsheet reading

Generate one workbook containing multiple report tabs: overview, details, anomalies, and dictionary