> For the complete documentation index, see [llms.txt](https://docs.stackai.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.stackai.com/stackai-tools/data-and-code.md).

# Data and Code

Choose a tool based on the form of your input and the result you need. Use analysis for calculations, visualization for charts, JSON tools for structured fields, and regular expressions for patterns in text.

| Tool                                                                                               | When to use it                                                                                   |
| -------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------ |
| [Analysis Tool](/stackai-tools/data-and-code/analysis-tool.md)                                     | Analyze files, calculate results, or create a chart from a plain-language question.              |
| [Visualize Dataset](/stackai-tools/data-and-code/visualize-dataset.md)                             | Turn CSV data into a chart that makes a comparison, trend, or distribution easier to understand. |
| [JSON Processor](/stackai-tools/data-and-code/json-processor.md)                                   | Filter or reshape JSON data before passing it to another step.                                   |
| [Extract JSON Data with JMESPath](/stackai-tools/data-and-code/extract-json-data-with-jmespath.md) | Select a value or list from JSON that is already available in the workflow.                      |
| [Regex Extract](/stackai-tools/data-and-code/regex-extract.md)                                     | Find text that follows a defined pattern, such as a reference number or a date format.           |


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