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PPTX Converter

Convert files to and from PPTX online for free. Fast, secure, and high-quality file conversion with no sign-up or software required.

  • Free to use
  • No file stored beyond 1 hour
  • Encrypted over TLS 1.2/1.3
  • No watermarks

Drag and drop your files here or click to upload.

Maximum file size is 1GB

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How it works

Three steps to your converted file

Everything happens in your browser tab - upload, pick a format, download. The heavy lifting runs on our servers.

  1. 01

    Upload your file

    Drag and drop, click to browse, or paste a URL. Batches take up to 20 files at once - 230+ input formats across video, audio, image, document, and archive types.

  2. 02

    Choose an output format

    Pick from over a hundred output formats. Filter by category or search by name - every option is open to everyone, no account needed.

  3. 03

    Convert & download

    Hit Convert and grab your download link moments later. Originals are erased when the job completes; results are cleared within about an hour.

What is a PPTX file?

PowerPoint Open XML Presentation

Developed By
Microsoft
Initial Release
2007
MIME Type
application/vnd.openxmlformats-officedocument.presentationml.presentation

The PPTX format is the default XML-based presentation file type for Microsoft PowerPoint 2007 and later, standardized as ECMA-376 and ISO/IEC 29500 (Office Open XML). It replaces the binary PPT format by using a ZIP-compressed directory structure containing separate XML files for slide data, themes, and metadata, alongside folders for embedded media. This modular architecture reduces file size via deflate compression and improves data recovery, as undamaged components remain accessible even if specific XML parts are corrupted.

How to open a PPTX file

PPTX is natively supported by all Microsoft PowerPoint versions from 2007 onwards on Windows, macOS, iOS, and Android. It has broad cross-platform support, with full editing capabilities available in Apple Keynote, Google Slides, and LibreOffice Impress. Because it is a ZIP archive, users can also rename the extension to .zip to manually extract embedded media assets without specialized software.

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Why RunConvert

The fastest way to convert any file

Purpose-built for speed, privacy, and breadth of format support.

  • 3,000+ conversions supported

    Every popular and niche format covered - video, audio, image, document, archive and more. New formats added regularly.

  • Fast, cloud-powered

    No queue, no waiting. Files are processed on high-performance servers and returned in seconds, even for large files.

  • Secure & private

    Encrypted in transit and never shared with anyone. Uploads are erased the moment your job completes, and results shortly after.

  • Free - no account needed

    Convert without creating an account - no credit card, no trial clock. Sign in only if you want history and higher daily limits.

Guides

Step-by-step guides

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