> For the complete documentation index, see [llms.txt](https://docs.microreact.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.microreact.org/instructions/creating-a-microreact-project/supported-file-formats.md).

# Supported File Formats

### Required Files

Only a **data file** is required for creating projects. All other files are optional.

### Data / Metadata File Formats

* [Comma-separated values ](https://en.wikipedia.org/wiki/Comma-separated_values)(`.csv`)
* [Tab-separated values](https://en.wikipedia.org/wiki/Tab-separated_values) (`.tsv`)
* Microsoft [Excel Office Open XML](https://en.wikipedia.org/wiki/Office_Open_XML) (`.xlsx`) or [Excel Spreadsheet](https://en.wikipedia.org/wiki/Microsoft_Excel#File_formats) (`.xls`)
* [OpenDocument Spreadsheet](https://en.wikipedia.org/wiki/OpenDocument) (`.ods`)
* [dBase database](https://en.wikipedia.org/wiki/.dbf) (`.dbf`)
* Google Sheets (learn [how to link Microreact to GoogleSheets](/instructions/tips-and-faq/link-microreact-projects-to-google-sheets.md))

Note that .txt is not a supported file type. .txt files must be converted to a supported file type before upload. (TIP: In some cases, this is as simple as changing the extension on your file.)

### Tree File Formats

* [Newick format](https://en.wikipedia.org/wiki/Newick_format) (`.nwk`, `.newick`, `.tre`, `.nhx`, `.tree`, or `.treefile`)
* [Nexus format](https://en.wikipedia.org/wiki/Nexus_file) (`.nex` or `.nexus`)

### Network File Formats

* [DOT graph description language](https://en.wikipedia.org/wiki/DOT_\(graph_description_language\)) (`.dot`, `.gv`)

### Geographical Features

* [GeoJSON](https://en.wikipedia.org/wiki/GeoJSON) (`.geojson` or `.geo.json`)

### .microreact files

* [A previously saved microreact project](/instructions/saving-and-sharing-projects.md) (`.microreact`)


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