Bento: Single HTML File for Collaborative, Offline Presentations.

starfallg· July 22, 2026 View original

Summary

Bento is a new tool that packages an entire presentation, including editing, viewing, data, and collaboration features, into a single HTML file. It operates offline, requires no installation or cloud login, and supports shared editing via an encrypted relay.

A new presentation tool called Bento has been developed to address the complexities of creating and editing slide decks using web technologies. Unlike traditional methods that often require code edits for minor changes, Bento consolidates all presentation functionalities into a single HTML file. This innovative approach allows users to edit, present, print, and save presentations entirely offline, without needing any installation or cloud account. The tool facilitates easy sharing via email or Airdrop, enabling recipients to collaborate live on slides using just a web browser. It also integrates with AI tools like Claude or ChatGPT to convert existing PowerPoint files into Bento format. The entire system is designed with privacy in mind, utilizing an encrypted, blind relay for shared editing that never accesses user data. The project is open-source under an MIT license, built upon reveal.js and other libraries.

Why it matters

This tool offers a highly portable, private, and collaborative solution for presentations, streamlining workflows for professionals who need to create and share dynamic content without relying on proprietary software or constant internet access.

How to implement this in your domain

  1. 1Download a Bento HTML file to create a new presentation.
  2. 2Share the HTML file directly with collaborators for real-time editing.
  3. 3Utilize AI tools like Claude or ChatGPT to convert existing PowerPoint files into Bento format.
  4. 4Explore the open-source code to customize or integrate Bento into existing web-based workflows.
  5. 5Present directly from the HTML file in any modern web browser, even offline.

Who benefits

EducationConsultingMarketingSoftware DevelopmentResearch

Key takeaways

  • Bento offers a self-contained, single HTML file solution for presentations.
  • It supports offline editing, viewing, and live collaboration without cloud dependency.
  • The tool integrates with AI for converting existing presentation formats.
  • Its open-source nature allows for customization and community contributions.

Original post by starfallg

"Over the past few months, our team has been building more and more slidedecks using web frontend technologies with coding harnesses like Claude Code, but a common complaint is to make even small edits we need to edit the code either manually or via the harness. To avoid this loop…"

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