Bento Slides

This PowerPoint alternative is a single HTML file. A Bento deck carries its own viewer, presenter, and editor inside the document — open it in any browser, edit it, present it, send it. The person you send it to needs nothing: the file is the software.

Why this exists:

Office documents used to be things you had. Now they're things you rent — locked in someone's cloud, behind someone's login, readable only while a company keeps its servers on. Bento takes the other path:

• One file, forever. Deck, fonts, images, charts, animations, and the full editor travel together. A copy from 2026 will open in 2036.
• View-source honest. Your data sits in a plain, readable JSON block at the top of the file. No binary formats, no lock-in, no archaeology.
• It saves itself. The file rewrites its own data block on save (File System Access API, with a download fallback). No app to install, ever.
• Local-first, provably. Flip on Offline mode and nothing leaves your machine — updates and collaboration are hard-blocked, and the app says so.