PowerPoint presentation
The legacy binary Microsoft PowerPoint presentation format.
Best for older slide decks and Office compatibility.
PPT to PPTX
Updates legacy PowerPoint PPT files to PPTX. Add your files, convert them in one batch, and download each PPTX directly.
1-hour guest cleanupMalware scanned2 at once, 10 per day
How to convert PPT to PPTX
The converter runs in your browser and an isolated processing queue. Nothing to install, and every upload is scanned for malware before it is processed.
- 1Add your PPT filesDrop PPT files into the converter or choose them from your device. Guest files can be up to 25 MB each.
- 2Choose PPTXSet PPTX as the output for the whole batch, then change individual files if needed.
- 3Convert and downloadStart the batch and download each PPTX directly, or save it to your workspace to get a permanent link.
PowerPoint presentation
The modern XML-based Microsoft PowerPoint presentation format.
Best for editable slide decks and presentations.
PPT to PPTX
What to expect from PPT to PPTX
What changes in the file, and what to check before you share the result.
Check fonts and layout
Slides, text, and images carry over between PPT and PPTX. Custom fonts, complex graphics, and animations can change, so click through the result before presenting.
Starting from PPT
PPT is the PowerPoint format used before 2007, so very old decks may use features that newer tools handle differently.
PPT to PPTX questions
Short answers about limits, privacy, and keeping the converted file.
Will my slides look the same in PPTX?
Most slides transfer closely. Fonts that are not installed on the viewing computer, complex graphics, and animations are the most common differences.
Is the PPT to PPTX converter free?
Yes. Without an account you can convert up to 10 files a day, 2 at a time, up to 25 MB each. A free account adds monthly conversion credits and larger files.
How long are my files kept?
Guest uploads and results are deleted automatically after 1 hour. Conversions stay temporary when you are signed in too, unless you save a result to your workspace.
Can I get a permanent link to the PPTX file?
Yes. Save the result to a SteadyLink workspace and it gets a stable link. If you make a new version later, replace the file and the link stays the same.
Browse by file type
Each category has its own converter, format list, and common routes.
Images
JPG, PNG, WebP, AVIF, GIF, TIFF, BMP, HEIC, ICO, SVG
Documents
DOC, DOCX, ODT, RTF, TXT, HTML, PDF
Spreadsheets
XLS, XLSX, ODS, CSV, PDF
Presentations
PPT, PPTX, ODP, PDF
PDF, DOCX, JPG, PNG, TXT
Audio
MP3, WAV, AAC, FLAC, OGG, M4A, Opus
Video
MP4, WebM, MOV, AVI, MKV, GIF, MP3
Archives
ZIP, TAR, TAR.GZ, 7Z
Ebooks
EPUB, MOBI, AZW3, PDF, TXT
Keep the useful ones.
Conversions remain temporary even when you are signed in, so save a result to your workspace when you want a stable URL and revision history.
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