32 Open-Source HTML Slide Templates to Stop AI from Generating Ugly PPTs

Introduction

The author presents a GitHub repository ( github.com/zarazhangrui/beautiful-html-templates) that provides 32 HTML slide templates aimed at improving AI‑generated presentations, which often suffer from poor aesthetics when the model designs slides from scratch.

Repository Highlights

Each template contains 8–13 slides covering cover, middle, and ending layouts.

Pure HTML + CSS (minimal JavaScript for navigation) works without any build tools.

Every template includes a complete visual system: fonts, color palette, decorative elements, and spacing rhythm.

Metadata files index.json and AGENTS.md enable agents to read, match, and clone templates automatically.

Released under the MIT license.

Why the Repository Is Valuable for AI Agents

While any developer can create a template, this repo supplies a structured AGENTS.md manual that lets an AI agent perform a six‑step workflow, keeping the aesthetic decision in human hands and delegating only the execution to the model.

Six‑Step Agent Workflow (AGENTS.md)

Ask the user two questions: the presentation scenario and the desired mood (mandatory to avoid the model’s over‑confidence).

Read index.json and select three stylistically distinct candidates.

Generate a cover‑page preview for each candidate, inserting the user‑provided title, author, and date.

Open the three previews in a browser (using the open command) so the user can visually choose.

After selection, clone the full template and rewrite content page by page.

If the content exceeds the original slots, add new pages using the same design language; do not switch templates or introduce new visual styles.

How to Use the Repository

For a fully automated run, copy the README instruction into an LLM such as Claude Code, Codex, or Cursor:

Clone https://github.com/zarazhangrui/beautiful-html-templates and follow the instructions in AGENTS.md to build me a beautiful HTML slide deck.

For manual use:

git clone https://github.com/zarazhangrui/beautiful-html-templates.git
cd beautiful-html-templates/templates/<em>chosen‑template</em>
open template.html

Each template directory is self‑contained; copying it into a project allows easy text, color, or page modifications.

Practical Experience

The author tested the "Soft Editorial" style by converting an article about Anthropic’s new Skills into an HTML slide deck. The experience was smooth, with ready‑made fonts, centralized CSS color variables for global theming, and navigation via J/K or arrow keys.

Fonts are pre‑configured, eliminating extra setup.

Changing a single CSS variable updates the entire color scheme.

Full‑screen browser presentation works without additional tools.

Observed Limitations

No built‑in chart or data‑visualization support: Users must embed SVG or use libraries like ECharts manually.

Inconsistent Chinese font rendering: Many templates prioritize Latin fonts, causing Chinese characters to collapse unless a fallback is added.

PDF export glitches: Browser printing can misplace absolutely positioned decorative elements.

Template distribution bias: While 32 styles exist, most are variations of the "Soft Editorial" theme; serious academic or financial presentations have few suitable options.

Target Audience

Best suited for small teams that are comfortable editing HTML and want to create technical talks, product launches, brand proposals, or design reviews. Not recommended for users who expect a one‑click PPT generation without any code involvement.

Broader Implications

The author observes a growing trend: HTML is re‑emerging as a universal content carrier, replacing traditional PPT, posters, and e‑cards because it is natively supported by browsers and widely represented in AI training data. Standardized HTML templates act as "building blocks" that let AI focus on content while humans retain control over visual quality.