PPTX を PPSX に変換

Free online PPTX to PPSX converter. Fast, secure, no signup required.

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Accepted: PPTX files · Max 100 MB per file

pptx ppsx

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Need to convert PPTX to PPSX? MegaConvert makes it easy. Upload your Microsoft PowerPoint Open XML Presentation (PPTX) file and get a PowerPoint Open XML Slide Show (PPSX) file in seconds — no software to install, no signup required. Whether you need this conversion for business presentations / office work, our online converter handles it instantly. Free for files up to 25MB, with support for larger files up to 2GB.

How to Convert PPTX to PPSX Online

1
Upload your PPTX file
Click the upload area or drag and drop your PPTX file. Files up to 25MB are free. Larger files are supported with pay-per-use.
2
Choose PPSX as output format
PPSX is automatically selected on this page. You can adjust conversion settings if needed.
3
Click Convert
Hit the Convert button to start processing. Your file will be converted using our high-performance servers.
4
Download your PPSX file
Once conversion is complete, click Download to save your new PPSX file. Free files are available for 1 hour.

Why Convert PPTX to PPSX?

**Reduce file size** — Converting between formats can significantly reduce file size, making files easier to share via email or cloud storage.
**Software requirements** — Your software or platform may require PPSX format specifically. Converting ensures full compatibility.

PPTX vs PPSX — Format Comparison

Feature	PPTX	PPSX
Full Name	Microsoft PowerPoint Open XML Presentation	PowerPoint Open XML Slide Show
Developer	Microsoft	Microsoft
First Released	2007	2007
Category	Presentation	Presentation
Extension	.pptx	.ppsx
MIME Type	application/vnd.openxmlformats-officedocument.presentationml.presentation	application/vnd.openxmlformats-officedocument.presentationml.slideshow

Animations and transitions are lost when converting to PDF or images.

About PPTX Format

Modern Microsoft PowerPoint format based on Open XML with ZIP compression.

Full name: Microsoft PowerPoint Open XML Presentation

Developer: Microsoft (2007)

About PPSX Format

PowerPoint slideshow format that opens directly in presentation mode.

Full name: PowerPoint Open XML Slide Show

Developer: Microsoft (2007)

よくある質問

Upload your PPTX file to MegaConvert.io, select PPSX as the output format, and click Convert. Your converted file will be ready to download in seconds. No software installation required.

Yes! Files up to 25MB can be converted for free, up to 3 times per day. For larger files, pay-per-use pricing starts at just $2 for files up to 100MB.

Absolutely. All uploaded files are encrypted in transit (HTTPS), scanned for viruses, and automatically deleted after conversion. We never share or access your files.

Free users can convert files up to 25MB. Pay-per-use supports files up to 2GB. Subscribers get up to 2GB with priority processing.

Modern Microsoft PowerPoint format based on Open XML with ZIP compression. Developer: Microsoft (2007).

PowerPoint slideshow format that opens directly in presentation mode. Developer: Microsoft (2007).