Keynote

Keynote is Apple's presentation software, first released in 2003 at Macworld by Steve Jobs. The .key format stores slides, animations, and media as a ZIP archive of binary property lists and XML. Keynote is acclaimed for the visual quality of its default themes and the smoothness of its slide transitions; files must be exported to PPTX or PDF to be shared with non-Apple audiences.

File extensions	.key
MIME type	application/x-iwork-keynote-sffkey
Developer	Apple
First released	2003
Category	Presentations
Open standard	No (proprietary)

What opens Keynote files

• Apple Keynote (macOS / iOS)
• iCloud Keynote (web)

Browse File Formats

Reference details for 53 file formats — extensions, MIME types, what opens each one, and how they convert.

7Z Archives ABW Documents AI Images AVIF Images AZW3 E-books BMP Images CSS Other CSV Spreadsheets DjVu E-books DOC Documents DOCX Documents EPS Images EPUB E-books FB2 E-books GIF Images GZ Archives HEIC Images HTML Documents ICO Images ISO Archives JPG Images JSON Other Keynote Presentations Markdown Documents MOBI E-books Numbers Spreadsheets ODP Presentations ODS Spreadsheets ODT Documents OTF Other Pages Documents PDF Documents PNG Images PPT Presentations PPTX Presentations PSD Images RAR Archives RAW Images RTF Documents SVG Images TAR Archives TeX / LaTeX Documents TIFF Images TSV Spreadsheets TTF Other TXT Documents WebP Images WOFF / WOFF2 Other WPD Documents XLS Spreadsheets XLSX Spreadsheets XML Documents ZIP Archives