File Extensions.
Understand the formats that power the digital world.
From simple text files to complex rich documents, master the anatomy and use cases of standard file extensions.
Data Engineering
- DB: Generic Database File: The universal data container.
- SQLite: Portable Database: A database in a single file.
- SQL: Structured Query Language: The language of data.
- CSV: Comma-Separated Values: The universal data exchange format.
Spreadsheets
- NUMBERS: Apple Numbers Spreadsheet: Visual data storytelling.
- XLSM: Macro-Enabled Spreadsheet: Excel with automation power.
- ODS: OpenDocument Spreadsheet: The open spreadsheet standard.
- XLS: Legacy Excel Spreadsheet: The foundation of digital spreadsheets.
- XLSX: Modern Excel Spreadsheet: The data powerhouse.
Presentations
- ODP: OpenDocument Presentation: The open standard for slides.
- PPT: Legacy Presentation: The classic slide deck format.
- PPTX: Modern Presentation: The gold standard for slide decks.
Word Processing
- WPS: WPS Office Document: The lightweight contender.
- PAGES: Apple Pages Document: The designer's word processor.
- ODT: OpenDocument Text: The open text standard.
- DOC: Legacy Word Document: The classic document format.
- DOCX: Modern Word Document: The standard for office documents.
- RTF: Rich Text Format: The universal translator.
Digital Publishing
- TEX: LaTeX Document: The mathematician's choice.
- PDF: Portable Document Format: The digital paper standard.
Software Engineering
- TSX: TypeScript XML: The modern web component.
Markdown & Text
- MD: Markdown: The programmer's writer.
- TXT: Plain Text: The simplest file in the world.
Learn by Doing.
Every tutorial in this collection is designed to be actionable. Follow along and build your skills with real-world tools and scenarios.
Public Knowledge.
I believe in the power of open learning. These tutorials are free to access and follow. No subscriptions, just step-by-step guides.