Source: https://seerepo.com/r/mrdoob/three.js/built
Markdown source: https://seerepo.com/r/mrdoob/three.js/built.md
Description: three.js is a JavaScript repo. It makes its content with jpeg-js, pngjs, and turndown and is tested with Puppeteer.

# What is three.js built with?

three.js is a JavaScript repo. It makes its content with jpeg-js, pngjs, and turndown and is tested with Puppeteer. It has 566,150 written lines, with 300 test files.

Read on November 4, 2026, at commit 1cb01b9.

Repository: https://github.com/mrdoob/three.js

## Support

### Content

- **jpeg-js**: 1 file
- **pngjs**: 1 file
- **[turndown](https://seerepo.com/uses/turndown)**: 1 file

### Testing

- **Puppeteer**: 3 files

## Other repos with a similar stack

- [microsoft/playwright](https://seerepo.com/r/microsoft/playwright/built): jpeg-js, pngjs
- [n8n-io/n8n](https://seerepo.com/r/n8n-io/n8n/built): turndown
- [firecrawl/firecrawl](https://seerepo.com/r/firecrawl/firecrawl/built): turndown
- [open-webui/open-webui](https://seerepo.com/r/open-webui/open-webui/built): turndown
- [immich-app/immich](https://seerepo.com/r/immich-app/immich/built): pngjs
- [cline/cline](https://seerepo.com/r/cline/cline/built): turndown

## Frequently asked questions

### What language is three.js written in?

three.js is written in JavaScript, with 566,150 written lines.

### Does three.js have tests?

Yes. three.js has 300 test files and is tested with Puppeteer.

### Which repos have a stack like three.js's?

The ones that share most of its stack: microsoft/playwright, n8n-io/n8n, and firecrawl/firecrawl.

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.