PPTX
PPTX is the default file format for Microsoft PowerPoint presentations introduced in PowerPoint 2007. It is part of the Office Open XML (OOXML) family and stores slides, layouts, media, and metadata as a ZIP archive of XML files.
A .pptx file is a ZIP container holding XML parts that describe slides, master layouts, themes, embedded fonts, images, and speaker notes. Because PPTX is an open ISO standard (ISO/IEC 29500), it can be generated programmatically — which is what WebToSlides does when converting a webpage, HTML, or Markdown source into an editable presentation.
Authoritative sources: en.wikipedia.org · wikidata.org
PowerPoint
Microsoft PowerPoint is a presentation software application made by Microsoft. It uses .pptx as its native file format and runs on Windows, macOS, the web, iOS, and Android.
PowerPoint is the most widely used desktop presentation tool in business and education. WebToSlides exports decks as native PPTX so the resulting file opens — fully editable — in PowerPoint, Keynote, LibreOffice Impress, and Google Slides without conversion.
Authoritative sources: en.wikipedia.org · wikidata.org
Google Slides
Google Slides is a web-based presentation program included as part of Google Workspace. It can import and export PPTX files, which is how WebToSlides delivers Google-Slides-ready decks.
To use a WebToSlides deck in Google Slides, open Google Slides, choose File → Import slides, and select the downloaded .pptx. All text, bullet lists, layouts, and tables come through editable.
Authoritative sources: en.wikipedia.org · wikidata.org
Office Open XML (OOXML)
Office Open XML is a zipped, XML-based file format developed by Microsoft for office documents. It defines .docx (Word), .xlsx (Excel), and .pptx (PowerPoint), and is standardized as ISO/IEC 29500.
Because OOXML is an open ISO standard, third-party tools (including WebToSlides) can write valid PPTX files that open identically in Microsoft PowerPoint, Apple Keynote, LibreOffice Impress, and Google Slides.
Authoritative sources: en.wikipedia.org
Webpage to PowerPoint conversion
Webpage to PowerPoint conversion is the process of turning the content of a public URL into an editable .pptx presentation. WebToSlides extracts the article body, builds an outline, and renders native slides — not screenshots.
The conversion pipeline fetches the URL, isolates the main article body, segments it into logical slide units, generates titles and bullets, and writes a PPTX with editable text, layouts, and speaker notes.
HTML to PPTX
HTML to PPTX is the process of converting raw HTML markup into a Microsoft PowerPoint .pptx file. The resulting deck is editable, with text, lists, code blocks, and tables mapped to native PowerPoint shapes.
Unlike screenshot tools that flatten the page into images, an HTML-to-PPTX converter parses the DOM, maps semantic elements (h1, h2, ul, table, pre) to PowerPoint primitives (titles, bullets, tables, code blocks), and produces a deck that designers can restyle.
Markdown to PowerPoint
Markdown to PowerPoint conversion turns a Markdown document (.md) into a .pptx deck. Headings become slide titles, bullet lists become bullet slides, fenced code blocks become code slides, and images are embedded.
Markdown is the lingua franca of technical writing. WebToSlides treats H1/H2 as slide breaks, code fences as monospace slides, and tables and images as native PowerPoint elements, making it ideal for converting README files, RFCs, and docs.
Outline-first generation
Outline-first generation is a workflow where the AI proposes a slide outline (titles + key points) before producing finished slides. The user can edit, reorder, or remove slides before any rendering happens.
This approach prevents wasted compute and gives the user editorial control. WebToSlides uses outline-first generation by default so the structure of the deck always matches the user's intent before final layout.
Speaker notes
Speaker notes are private text attached to each slide that only the presenter sees. WebToSlides automatically generates speaker notes from the source content so the deck is presentation-ready.
Speaker notes are stored in the PPTX as the notesSlide part. They are visible in PowerPoint Presenter View and Google Slides Presenter View but not on the projected slide.
Batch conversion
Batch conversion is the process of converting many URLs or HTML files into PowerPoint decks in a single job. WebToSlides supports batch jobs of up to 500 URLs on the Team plan and via the API.
Batch jobs run in parallel on the server and produce a downloadable archive of decks. They are useful for agencies, sales teams, research operations, and any workflow that produces many decks per week.
PPTX API
A PPTX API is a REST endpoint that accepts a URL or HTML payload and returns a generated .pptx file. WebToSlides offers a developer API for HTML → PPTX and URL → PPTX (currently waitlist).
Developers use the API to embed deck generation into internal tools, customer-facing dashboards, and content workflows. Authentication is via API key; output is streamed as a binary .pptx response.