OpenPresentation

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What OpenPresentation is

OpenPresentation is the public reference home for the Open Presentation Format, a portable JSON format for slide decks. Decks can be authored as JSON, Markdown, or JSON-compatible YAML, then checked against schemas for format, references, accessibility, layout, and content. The editor supports validated changes, undo and redo, inline browser editing, and local IndexedDB autosave. Slides can contain text, lists, charts, tables, images, video, code, and timelines; CSV and JSON data can be used for charts and tables. The toolkit renders SVG, PNG, and PDF previews and exports editable PowerPoint files. It can also import PowerPoint, though imported shapes that are not mapped become editable text blocks with a diagnostic. The CLI and libraries support local authoring, validation, editing, preview, and export without an account, model call, hosted API, or paid subscription. Browser validation keeps pasted content in the browser. The format and related sources are MIT licensed. The site describes the toolkit for agents and developers; packages and a CLI are available on npm. Documented operating systems include macOS, Linux, and Windows, with Node.js requirements.

Who it suits

It suits developers and agents creating or reviewing slide decks as structured documents, especially those who want local tools and line-by-line diffs in git.

What it does well

Free plan is listed
Authors can use JSON, Markdown, or YAML
Exports editable PowerPoint files and previews
Browser validation does not upload pasted content
Format and related sources are MIT licensed

What to know first

PowerPoint imports are mapped mechanically
Some imported shapes become editable text blocks
Native PowerPoint round-trip fidelity is outside scope
CLI requires Node.js

Verdict

OpenPresentation offers a local toolkit for creating, validating, editing, and exporting structured slide decks. Its documented scope is a supported subset, not universal Office parity.

Facts from OpenPresentation's own pages

AI assistance: Yes · openpresentation.org, 20 Sept 2026
Audience: The site describes the toolkit as intended for agents and developers, and says any agent that can write files can author OPF. · openpresentation.org, 11 Oct 2026
Authoring: OPF decks are structured so people and AI tools can author them directly, then render them to PowerPoint or SVG. · openpresentation.org, 11 Oct 2026
Data and content: Slide content can include text, lists, charts, tables, images, video, code, and timelines; CSV and JSON data can be imported for charts and tables. · openpresentation.org, 11 Oct 2026
Editing: The browser playground lets users edit JSON or double-click slide content, with validation running in the browser as they type. · openpresentation.org, 11 Oct 2026
Exports: The tools can export editable PowerPoint files and produce SVG, PNG, and PDF previews. · openpresentation.org, 11 Oct 2026
Free plan: Yes · openpresentation.org, 20 Sept 2026
Installation: The core packages and CLI are published on npm, and the CLI can install portable agent skills into a project. · openpresentation.org, 11 Oct 2026
Integrations: The documentation provides examples for generating OPF decks with Google AI Studio, the OpenAI API, the Claude API, and the Vercel AI SDK. · openpresentation.org, 11 Oct 2026
Known limitation: The documentation says imported PowerPoint decks are mapped mechanically and that unmapped shapes become editable text blocks with a diagnostic. · openpresentation.org, 11 Oct 2026
License: The OPF format, schemas, catalogs, examples, and package sources are MIT licensed. · openpresentation.org, 11 Oct 2026
Limits: The quickstart describes a supported subset rather than universal Office parity and says native PowerPoint round-trip fidelity is outside its scope. · openpresentation.org, 11 Oct 2026
Local operation: The toolkit’s documented workflows run locally without an account, model call, or hosted API; the renderer makes no network request. · openpresentation.org, 11 Oct 2026
Local use: The CLI and libraries can author, validate, edit, preview, and export decks locally without an account, model call, hosted API, or paid subscription. · openpresentation.org, 11 Oct 2026
Offline access: Yes · openpresentation.org, 20 Sept 2026
Platform support: The CLI documentation lists macOS, Linux, and Windows as supported operating systems and requires Node.js 20 or later. · openpresentation.org, 11 Oct 2026
PowerPoint export: Yes · openpresentation.org, 20 Sept 2026
PowerPoint import: Yes · openpresentation.org, 20 Sept 2026
Privacy: The playground says validation runs entirely in the browser and pasted content is not uploaded anywhere. · openpresentation.org, 11 Oct 2026
Purpose: OpenPresentation is the public reference home for OPF, a portable JSON document format for slide decks. · openpresentation.org, 11 Oct 2026
Rendering and export: The toolkit renders decks to SVG, PNG, and PDF, and exports editable PowerPoint files. · openpresentation.org, 11 Oct 2026
Review: Because a deck is a JSON document, it can be read in review and diffed line by line in git. · openpresentation.org, 11 Oct 2026
Runtime requirement: The current developer quickstart verifies its coordinated package set with Node 24 and says the packages declare Node 22 or later. · openpresentation.org, 11 Oct 2026
Stewardship: The site says OpenPresentation is stewarded by Data Advantage and sponsored by PPTX.dev. · openpresentation.org, 11 Oct 2026

Where OpenPresentation stands on Freedom251

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