# tools.simonwillison.net

Miscellaneous HTML+JavaScript tools built mostly with the help of LLMs. See also [/python/](https://tools.simonwillison.net/python/) for tools written using Python.

This collection is an experiment in prompt-driven development with very low stakes.

The [colophon](https://tools.simonwillison.net/colophon) lists commit messages and transcripts for every tool.

The code lives in [simonw/tools](https://github.com/simonw/tools) and many tools used the Claude custom instructions [described here](https://simonwillison.net/2024/Dec/19/one-shot-python-tools/#custom-instructions).

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