PowerPoint to Markdown: Extract Slides Without the Bloat

PowerPoint files are everywhere -- team decks, conference talks, client proposals, training materials. They are also opaque binary blobs that resist search, diffing, and programmatic access. Converting them to Markdown unlocks a range of workflows that PPTX simply cannot support.

Why Convert Slides to Markdown

Version control. A PPTX file in Git is a black box. You cannot diff two versions to see what changed. Markdown is plain text -- every edit shows up clearly in git diff, and merge conflicts are resolvable by humans.

Documentation reuse. That 60-slide architecture deck contains valuable content: system diagrams described in speaker notes, bullet-point summaries of design decisions, comparison tables. Extracting this to Markdown lets you reuse it in wikis, READMEs, and documentation sites without copy-pasting from PowerPoint.

LLM input. Need to ask ChatGPT questions about a presentation? Uploading the PPTX directly works, but you are relying on the model's file parsing. Giving it clean Markdown is faster, more reliable, and uses fewer tokens.

Search. Plain text is searchable by every tool ever built -- grep, ripgrep, your IDE, your documentation platform. PPTX requires specialized indexers.

What You Get

When you convert a PPTX file through mdstill, each slide becomes a Markdown section. The output follows a clean structure:

# Presentation Title

## Slide 1: Q3 Business Review

- Revenue up 18% year-over-year
- New customer acquisition: 2,400 accounts
- Expansion into APAC region on track

## Slide 2: Revenue Breakdown

| Region   | Q2 ($M) | Q3 ($M) | Growth |
| :------- | ------: | ------: | -----: |
| Americas |    12.4 |    14.1 |   +14% |
| EMEA     |     8.2 |    10.3 |   +26% |
| APAC     |     3.1 |     4.2 |   +35% |

## Slide 3: Technical Architecture

The platform consists of three core services:
1. **API Gateway** -- handles authentication and rate limiting
2. **Processing Engine** -- document conversion pipeline
3. **Storage Layer** -- S3-compatible object storage

Bullet points become Markdown lists. Tables become GFM tables. Titles become headings. The semantic structure of the presentation is preserved while the visual formatting (fonts, colors, animations) is stripped away.

Slide Structure Preservation

mdstill handles several PPTX-specific challenges:

Slide titles are extracted from the title placeholder, not guessed from the first text box. This ensures correct heading text even when the slide has multiple text elements.

Grouped content within a slide maintains its logical order. Bullet points appear in the order they were meant to be read, not in the order the shapes were created in PowerPoint (which can differ).

Tables in slides are converted to proper GFM Markdown tables with headers and alignment. This is particularly useful for data-heavy presentations.

Speaker notes, when present, can contain valuable context that does not appear on the slide itself. mdstill includes these below the slide content, clearly delineated.

Real-World Use Cases

Conference talk archival. After giving a talk, convert the deck to Markdown and publish it alongside the video recording. Attendees can search the content, copy code snippets, and reference specific slides by heading.

Client deliverables. Convert proposal decks to Markdown to generate a text version that can be included in project documentation or fed into a contract management system.

Training materials. Onboarding decks converted to Markdown can be checked into a company wiki, kept up to date through pull requests, and searched by new hires.

AI analysis. Convert a competitor's public investor deck to Markdown, paste it into Claude or ChatGPT, and ask for a structured analysis. The model will perform significantly better with clean Markdown input than with a raw PPTX upload.

How to Convert

Using mdstill, the process takes seconds:

1. Go to mdstill.com and drop your PPTX file
2. Fast mode handles standard presentations instantly
3. Download the Markdown output
4. Commit it to your repo, paste it into your wiki, or feed it to an LLM

For bulk conversions, the API supports batch processing:

# Convert a presentation via the API
curl -X POST https://mdstill.com/api/convert \
  -F "file=@quarterly-review.pptx" \
  -o quarterly-review.md

The Markdown output is clean, portable, and ready for any downstream use.