KEY to PPTX Converter
A .key file is Keynote's own package, and nothing outside Apple's apps reads it. Converting it to PPTX gives Windows users, Google Slides and PowerPoint for Mac a deck they can open, edit and present.
Document Converter
or drop PDF, DOC, DOCX … files here ·
Max 95 MB per file· Up to 20 files· Deleted after 30 minutes
Files are processed on our servers and deleted after 30 minutes.
150 DPI turns an A4 page into about 1240 × 1754 px. Use 300 for printing.
Convert the whole file or only some pages or slides (PDF and presentation input).
Pages or slides to convert, e.g. 1-3, 5, 8-10.
UTF-8 works for every language. Choose UTF-8 with BOM if Excel or Notepad on Windows shows garbled characters; legacy encodings only for old software.
LF for macOS, Linux and code editors; CRLF for older Windows programs such as classic Notepad.
Comma is standard. Use semicolon for Excel in countries that write decimals with a comma (Germany, France, Brazil).
Excel input with several sheets: convert all of them (one section or file per sheet) or only the first.
How to use this tool
- 1
Upload the .key file
Add the Keynote presentation from a Mac, iPad, iCloud Drive or an email attachment. Up to 20 decks, each up to 95 MB.
- 2
Keep PPTX and Keep all
Convert to is set to PPTX (PowerPoint) and Formatting to Keep all, so theme colors, text boxes and slide sizes are copied as closely as PowerPoint allows.
- 3
Convert and play it through
Press Convert to PPTX, open the deck in PowerPoint and click through every slide with builds or video before you present.
Upload the .key file and press Convert to PPTX: slides, images, speaker notes and the slide size come across as an editable PowerPoint deck.
Why PowerPoint cannot open a .key file
Since Keynote 6 shipped with the iWork redesign in 2013, a .key file stores its slides in Apple's private IWA format, binary chunks compressed inside a ZIP-style package. Apple has never published that format, and Microsoft has never added a Keynote importer to PowerPoint. The result is a one-way street: Keynote opens PowerPoint files, PowerPoint does not open Keynote files.
That matters the moment a deck leaves the Mac. Conference organizers usually collect slides as PPTX for the podium PC, agencies hand pitch decks to clients who edit in Office, and teachers who build lessons in Keynote share them with colleagues on Windows laptops. Keynote's own Export To > PowerPoint works if you still have the app, but not if all you have is an attachment. Pages documents that travel with the deck follow the same route through Pages to DOCX.
Keynote and PowerPoint, from 1987 to now
1987
PowerPoint 1.0
Released for the Macintosh by Forethought; Microsoft bought the company the same year.
2003
Keynote 1.0
Apple launched Keynote, built for Steve Jobs's own keynote presentations.
2007
PPTX arrives
PowerPoint 2007 switched to Office Open XML, later standardized as ISO/IEC 29500.
2013
Keynote 6
Apple rebuilt iWork and moved .key files to the IWA format still used today.
What survives the trip from Keynote to PPTX
| from ↓ · to → | PPTX | |
|---|---|---|
| Slide text, editable | Slide text, editable to PPTX: yes | – Slide text, editable to PDF: no |
| Images, shapes and tables | Images, shapes and tables to PPTX: yes | Images, shapes and tables to PDF: yes |
| Speaker notes | Speaker notes to PPTX: yes | – Speaker notes to PDF: no |
| 16:9 and 4:3 slide sizes | 16:9 and 4:3 slide sizes to PPTX: yes | 16:9 and 4:3 slide sizes to PDF: yes |
| Builds with a PowerPoint equivalent | Builds with a PowerPoint equivalent to PPTX: yes | – Builds with a PowerPoint equivalent to PDF: no |
| Keynote-only effects | – Keynote-only effects to PPTX: no | – Keynote-only effects to PDF: no |
KEY
Apple Keynote presentation
KEY is the file format of Apple Keynote, the presentation app Apple introduced in 2003. It supports polished themes, cinematic transitions, Magic Move animations and embedded media. Only Apple devices open .key files natively; PowerPoint, Google Slides and Windows need a converted copy. Keynote can export to PPTX, PDF and video, though some effects may be simplified.
- Compression
- –
- Transparency
- –
- Animation
- Yes
- Introduced
- 2003 · Apple
PPTX
Microsoft PowerPoint presentation
PPTX is Microsoft PowerPoint's default presentation format since Office 2007, based on the Office Open XML standard. It stores slides, layouts, images, charts, speaker notes, transitions and embedded media in a ZIP package of XML. It is the most widely used format for slide decks in business and education. Google Slides, Keynote and LibreOffice Impress open PPTX, though fonts, animations and layout may change slightly.
- Compression
- –
- Transparency
- –
- Animation
- Yes
- Introduced
- 2007 · Microsoft
Keynote decks go to PPTX when a presentation made on a Mac has to be shown or edited on someone else's machine: a conference laptop running Windows, a colleague who builds slides in PowerPoint, or a client whose template rules are written for Office.
Before you convert a Keynote deck
| Do | Don't |
|---|---|
| Keep linked videos inside the presentation so they travel with it | Rename .key to .pptx; the insides are a different format |
| Note which slides use Magic Move so you can recheck them | Rely on Apple-only fonts if the deck will run on a Windows PC |
| Convert the latest saved version, not a copy from Time Machine | Present the converted file without one full rehearsal |
KEY to PPTX questions
Why does Windows not recognize my .key file?
No Windows program reads Keynote's format, so the system has nothing to associate with the extension. Microsoft PowerPoint, including the Mac version, has no Keynote import either. A converted PPTX opens everywhere PowerPoint files do.
Is a .key file the same thing as a Keynote presentation?
Yes. The .key extension is used by Keynote on Mac, iPad and iPhone. The same extension also appears on unrelated files, such as cryptographic key files and some software license keys, which are not presentations and will not convert.
What happens to Magic Move and other Keynote animations?
Builds and transitions that have a PowerPoint equivalent are carried over. Effects that exist only in Keynote cannot be written into a PPTX, so those slides change without the effect; play the deck once and reassign an animation in PowerPoint where it matters.
My Keynote deck uses Helvetica Neue. What will PowerPoint show?
Windows does not include Helvetica Neue or Apple's San Francisco fonts, so PowerPoint on a PC substitutes a font it has, usually Arial. Line lengths shift slightly; check slides with tightly fitted titles.
Can I send the PPTX back to the Keynote user?
Yes. Keynote opens PPTX files directly, so the deck can go back and forth. Each round trip can lose a little Keynote-specific styling, so agree on one app for the final edit.
Do I need Keynote installed to convert?
No. The conversion runs on our servers, so you can convert a .key received by email on Windows, Linux or a Chromebook. If you only need a read-only copy, Keynote to PDF is lighter to send.
