OOXML hacking for PowerPoint

Hack PowerPoint OOXML without unzipping the PPTX by hand.

A PowerPoint file is an OOXML package. PPTX Theme Editor lets you inspect and edit the XML behind theme colors, custom colors, recent colors, fonts, media, and other package files directly in your browser.

Open the OOXML editor Use the color editor

PowerPoint OOXML files you can inspect

Instead of renaming a .pptx to .zip, extracting files, editing XML, and rezipping the package, you can browse the package structure in place and export a modified PowerPoint file.

ppt/theme/theme1.xml and related theme files for color schemes, fonts, and effects.
ppt/presProps.xml for colors saved in PowerPoint's Recent Colors picker.
Slide, layout, and master XML files that may contain hard-coded a:srgbClr values.
Embedded media assets for previewing, downloading, and replacing images.

What OOXML hacking is useful for

`a:clrScheme`

Edit the color scheme that powers PowerPoint theme colors and branded template palettes.

Color archaeology

Find old brand values, hard-coded colors, and hidden palette entries across the PPTX package.

Raw XML edits

Open individual package files when the visual editor is not enough for a precise OOXML change.

Common searches this helps with

PowerPoint OOXML editor
Edit PPTX XML online
Modify theme1.xml in PowerPoint
Edit a:clrScheme colors in a PPTX file
Find and replace a:srgbClr values in PowerPoint XML

How to edit PPTX XML

Open a PowerPoint file. Select a .pptx or .pptm from your device.
Browse the package. Inspect theme, slide, layout, master, media, and property files.
Edit the right XML. Use the structured color tools or open raw XML for manual OOXML changes.
Export the package. Download a new PowerPoint file with your changes written back.

Edit PowerPoint OOXML locally.

The editor runs in your browser, so the PPTX package is not uploaded while you inspect or modify it.

Open PPTX Theme Editor