Free Tools

Brand Stack's free tool library. No account, no ads. Every tool runs on the website and — via @brandstack/cli — from the command line, powered by the same engine.

Brand Stack offers a growing library of free tools at brandstack.dev/tools. Every tool is free, requires no sign-up, and runs without ads. They cover the jobs that surface the week of a launch: sizing imagery, checking social cards, tagging URLs, picking colors and symbols.

Every tool exists in two forms backed by one engine (@brandstack/tools-engine on npm):

• The website — visual, interactive, nothing to install.
• The CLI — @brandstack/cli on npm: npx @brandstack/cli <tool>, for agents, scripts, and CI. Works on a clean machine with no credentials, and offline for every tool except the Moonshot Test (whose assessment runs on our servers).

Because both consume the same engine, they cannot drift: same logic, same output contract, and for image tools the same pixels (proven by golden-image tests in CI).

Available tools

More tools are in development. See the full catalog at brandstack.dev/tools.

Looking for the Template Studio? That is an in-app feature for generating reusable mockup compositions, documented under Templates.

The CLI

npx @brandstack/cli --help            # list every tool
npx @brandstack/cli launch-image-resizer ./hero.png --out ./launch --zip
npx @brandstack/cli color-palette-from-image ./logo.png --json
npx @brandstack/cli utm-builder https://example.com --source newsletter --medium email --campaign q3

Logged-in workspaces get a second command family from the same binary: brandstack list-brands, get-brand, create-mockup, and the rest of the MCP tool set as subcommands, authenticated with an API key (brandstack login, or BRANDSTACK_API_KEY in CI). Workspace commands and MCP connectors share one server endpoint, so rules and error messages are identical everywhere. There’s also brandstack upload <file>, which puts a local image in your workspace and prints its URL, the step that turns a screenshot on disk into something create-mockup can use. Agents connected over MCP can do the same without any key through create_upload_link. The free tools above never need any of this.

Two things worth knowing:

• Tool URLs are commands. Configure a tool visually on the website, copy its settings link, and pass the URL to the CLI (or hand it to an agent): npx @brandstack/cli "<settings link>". The URL’s query string carries the full setup.
• Subcommands are generated from the tool manifest, so a new tool on the website appears in the CLI without CLI changes.

Do I need a Brand Stack account?

No. All free tools work without signing in — on the website and in the CLI. Some results, like Moonshot Test assessments, can optionally be shared to a public community gallery, which also requires no account.

Can AI agents use these tools?

Yes, by design — and the CLI is the preferred path: it needs no browser, no credentials, and (Moonshot aside) no network. Every tool page still ends with a “How to use” section covering the CLI, browser steps, URL parameters, public APIs, and the output contract, and every tool is served as plain markdown for agents: append .md to any tool URL (like /tools/launch-image-resizer.md), request the page with an Accept: text/markdown header, or start from the index at /llms.txt.

How are the tools free?

Most tools run entirely on your device — in the browser or in the CLI — with no server cost; images and inputs never leave it. The Moonshot Test uses a lightweight AI model on our servers and is rate-limited to 5 requests per hour per IP to keep it free for everyone.