Open Source Licenses

Last updated November 5, 2026

Toolzami's tools are built with open source software. This page names the software, fonts and data that our pages send to your browser, and the licenses they come under. The full text of each license, with its copyright notice, is in the third-party notices file.

Every build of the site writes that file from the files the build contains. A build stops if a package it would ship has a license we do not accept or comes without its license text, so the file always matches the version of the site you are using.

Software

These packages run in your browser. The notices file also lists the smaller packages they depend on.

Pages and navigation

Pages and navigation: packages and licenses
Package	License
`react`	MIT
`react-dom`	MIT
`react-router`	MIT

Code editor

Code editor: packages and licenses
Package	License
`@codemirror/commands`	MIT
`@codemirror/lang-json`	MIT
`@codemirror/lang-sql`	MIT
`@codemirror/lang-xml`	MIT
`@codemirror/lang-yaml`	MIT
`@codemirror/language`	MIT
`@codemirror/lint`	MIT
`@codemirror/search`	MIT
`@codemirror/state`	MIT
`@codemirror/view`	MIT
`@lezer/highlight`	MIT

Interface components and icons

Interface components and icons: packages and licenses
Package	License
`@base-ui/react`	MIT
`class-variance-authority`	Apache-2.0
`clsx`	MIT
`lucide-react`	ISC
`sonner`	MIT
`tailwind-merge`	MIT

Styles and fonts

Styles and fonts: packages and licenses
Package	License
`tailwindcss`	MIT
`tw-animate-css`	MIT
`@fontsource-variable/geist`	OFL-1.1
`@fontsource-variable/geist-mono`	OFL-1.1

Tool engines

Tool engines: packages and licenses
Package	License
`@cfworker/json-schema`	MIT
`gpt-tokenizer`	MIT
`smol-toml`	BSD-3-Clause
`sql-formatter`	MIT
`yaml`	ISC

The interface components in our source code start from shadcn/ui (opens in a new tab) (MIT), copied into the project and changed where we needed to.

Fonts

Text is set in Geist and Geist Mono by the Geist Project Authors, packaged by Fontsource and licensed under the SIL Open Font License 1.1 (opens in a new tab). The font files are served from toolzami.com, unchanged.

Data

Some tools ship data from other projects:

The MCP Config & Schema Validator checks tool definitions against the JSON schemas of the Model Context Protocol (opens in a new tab) specification (Apache-2.0 and MIT) and the JSON Schema (opens in a new tab) meta-schemas (BSD-3-Clause).
The Meta Title & Description Checker estimates text width from the character widths of the Liberation Sans font (SIL Open Font License 1.1). Only the widths are shipped, not the font.
The AI Token Counter uses OpenAI's o200k_base and cl100k_base vocabularies as gpt-tokenizer publishes them (MIT).

Build tools

The tools that build the site run on our machines, and none of their code reaches your browser. One of them uses data that asks for credit: browser support data from caniuse-lite (opens in a new tab) by Ben Briggs, built from the Can I use (opens in a new tab) database and licensed under CC BY 4.0 (opens in a new tab).