# Free tools

> Browser-only helpers for AI-generated websites: HTML preview and ZIP checker. No signup; files stay on the visitor’s device.

Canonical: https://www.geminilaunch.com/tools
Last updated: 2026-11-03

## Tools

- [HTML preview](https://www.geminilaunch.com/tools/html-preview) — paste ChatGPT/Claude/Gemini HTML or open a local .html file; desktop/tablet/phone widths; download as index.html.
- Which tool: HTML code → HTML preview. A ZIP or folder, or a site that shows a blank page → ZIP checker.
- Both are free with no account, and files never leave the browser.
- [ZIP checker](https://www.geminilaunch.com/tools/zip-checker) — drop a website ZIP and see why a deploy shows a blank page (missing index.html, nested folder, src vs dist, casing, missing assets).

## Related

- [HTML preview](https://www.geminilaunch.com/tools/html-preview)
- [ZIP checker](https://www.geminilaunch.com/tools/zip-checker)
- [Preview before publish guide](https://www.geminilaunch.com/blogs/preview-ai-html-online-before-publish)