Embed our tools on your site

Quick start

Copy the snippet below into any HTML page. Replace trip-cost-calculator with the slug of the tool you want. A tool’s slug is the last segment of its URL — for example, https://freetoolarena.com/tools/mortgage-calculator.

<iframe
  src="https://freetoolarena.com/embed/trip-cost-calculator"
  width="100%"
  height="720"
  frameborder="0"
  loading="lazy"
  title="Trip cost calculator"
  style="border:1px solid #e2e8f0;border-radius:12px;max-width:720px;"
></iframe>

Every tool page has a copy-ready snippet

Open any tool on this site, scroll past the “How to use it” section, and click “Embed this tool on your site”. You’ll get a prefilled snippet that escapes the title correctly and sets a sane default height. Paste and ship.

What’s inside the iframe

• The tool’s interactive UI and live results.
• For risk categories (finance, health, home) — the relevant disclaimer travels with the embed.
• A small footer link back to the full tool page on Free Tool Arena.

What’s not inside

• No ads. AdSense policy prohibits serving ads in third-party iframes, so the embed view is fully ad-free.
• No header, no footer, no navigation — just the tool.
• No trackers beyond standard Vercel analytics on our domain. Embedding the iframe does not install cookies on your domain.

Sizing and responsiveness

The iframe content is fluid and honors the width you set. Height depends on the tool — most calculators fit comfortably in 600-800px. We recommend a conservative height with CSS overflow: auto, or increasing height to fit the tallest expected state. Some guidelines:

• Simple single-input tools (tip, BMI) — 500 px
• Multi-input calculators (mortgage, loan) — 720 px
• Tools with tables (amortization, bracket visualizer) — 900 px
• Document templates (receipts, letters) — 1200 px

Deep-linking with searchParams

Many of our calculators accept URL parameters as default values. For example, to pre-fill a mortgage embed with a $400,000 loan at 6.5% for 30 years:

<iframe src="https://freetoolarena.com/embed/mortgage-calculator?amount=400000&rate=6.5&term=30"
  width="100%" height="720"></iframe>

Supported parameters vary per tool. Inspect a tool page URL after using it; if it still works when you reload, the param is persistent and embeddable.

Rules & attribution

We ask two things:

1. Don’t remove the “Powered by Free Tool Arena” footer link inside the iframe — it’s how we keep the tools free for everyone.
2. Don’t scrape the iframe to extract the tool and reskin it on your own domain. Embedding the iframe is welcome; copy-pasting the rendered output is not.

Other than that, use them freely — commercial sites, personal blogs, internal dashboards, documentation, wherever it helps.

Something not working?

If a specific tool doesn’t render in your iframe — most likely a Content-Security-Policy issue on your own site — reach out via the contact page. If you need a tool we don’t have yet, tell us what you’d embed if it existed; we add tools based on requests.