pptx: Anthropic's PowerPoint skill for Claude

• Writes a pptxgenjs script that builds a new deck with charts, icons and notes

  For a new presentation, Claude writes JavaScript that builds each slide, then runs it.

  Try: “Make a 10-slide pitch deck for our Q3 results with a revenue chart”

  Runs code · Create a deck

• Unzips the .pptx, edits the slide XML, zips it back

  Keeps your template's layouts, fonts and colours by editing the file's slide XML directly.

  Try: “Fill this template.pptx with the content from notes.md”

  Write · Edit a deck or template

• Dumps every slide's text as Markdown, one block per slide

  Pulls the text out of a deck so Claude can summarise or reuse it.

  Try: “Summarise the key points of board-update.pptx”

  Read · Read a deck

• Makes a labelled image grid of every slide

  Lets Claude see a template's layouts so it can choose which slide fits each section.

  Runs code · thumbnail.py

• Duplicates a slide or layout and registers it in the file

  Adds a copy of a slide without breaking the deck. It rewrites the input unless you pass -o.

  Write · add_slide.py

• Removes slides, media and links that nothing uses any more

  Tidies the deck after slides are deleted.

  Delete · clean.py

• Checks the file's structure and charts, and names the fix for each failure

  Catches errors PowerPoint would reject before you open the file.

  Read · office/validate.py

• Runs LibreOffice without a window to convert files to PDF

  Converts the deck to PDF for checking, or upgrades an old .ppt file to .pptx.

  Try: “Convert old-deck.ppt to pptx”

  Runs code · office/soffice.py

• Renders each slide to an image and looks for overflow, overlap and low contrast

  Claude looks at pictures of the finished slides and fixes layout problems before it hands you the file.

  Runs code · Visual check

• Built-in palettes, safe fonts, sizes, spacing and a list of looks to avoid

  A style guide so slides do not all look the same.

  Try: “Make it look less like an AI-made deck”

  Design rules

Watch out for

• On Windows it can close your open PowerPoint

  Without LibreOffice, Claude may drive your installed PowerPoint to check slides, and one user lost all open decks. Install LibreOffice first. The issue is open. github.com

• One script compiles a small C helper at runtime

  Where sockets are blocked, soffice.py writes C code that is inside the script, compiles it with gcc and loads it into LibreOffice. Socket flagged this pattern; read the script if you run it on your own machine. github.com

• add_slide.py rewrites your deck unless told not to

  The skill's own notes say to pass -o, or the script rewrites the input deck in place. Work on a copy. github.com

• clean.py can delete every slide

  If presentation.xml cannot be parsed, clean.py treats every slide as unused and deletes them. Keep a copy of the original. The issue is open. github.com

• A crafted deck can read local files on old lxml

  The validators use lxml's default parser, and on lxml older than 5 a crafted .pptx can make them read local files. Open only decks you trust. The issue is open. github.com

• skills.sh audits: two pass, Socket warns

  Gen Agent Trust Hub passed it (Risk Level SAFE, noting dynamic and command execution). Snyk passed it (Risk Level LOW, no issues). Socket warned with one low alert on soffice.py. All three audits are dated Sep 15, 2026. skills.sh

• Claude.ai file creation has internet access

  Anthropic warns this may put your data at risk and says to monitor chats closely. Claude for PowerPoint should only be used with trusted files. anthropic.com

Security advisories

In their words