pptx

Create HTML files with fixed body dimensions (720pt × 405pt for 16:9), then use the html2pptx.js library with PptxGenJS to convert each file into a slide. Charts and tables are added to placeholder areas via the PptxGenJS API before saving with pptx.writeFile().

Unpack the .pptx with the unpack.py script, edit the slide XML files directly, validate changes with validate.py against the original, then repack with pack.py. This OOXML workflow handles speaker notes, comments, and layouts.

Yes. Extract the template's text and thumbnails, build a slide inventory, then use rearrange.py to duplicate and reorder template slides. Finally, replace placeholder text using inventory.py and replace.py with a JSON mapping.

A common cause is using hex colors with a '#' prefix in PptxGenJS, which corrupts the file. Always pass colors without the prefix, such as color: "FF0000", and avoid CSS gradients in HTML since they must be rasterized to PNG first.

Only web-safe fonts are supported: Arial, Helvetica, Times New Roman, Georgia, Courier New, Verdana, Tahoma, Trebuchet MS, Impact, and Comic Sans MS. Custom fonts like Roboto or Segoe UI may cause rendering issues.