# Formats Glossary

## Markdown

Markdown is a plain-text format for notes and documentation. Files usually end in `.md`.

## HTML

HTML is the format used for web pages. A single `.html` file can often be opened directly in a browser.

## JSON And JSONL

JSON is a structured data format. JSONL means one JSON object per line. It is useful for logs because each line can be read separately.

## CSV And TSV

CSV and TSV are table formats. They can usually be opened in spreadsheet tools.

## PDF, DOCX, XLSX, PPTX

These are common document, spreadsheet, and presentation formats. Codex may be able to inspect some of them, but results depend on the tools available on the machine.
