Embed free tools on your website

Drop any ToolsHub calculator or utility straight into your own site with one line of HTML. It runs in your visitor's browser — free, no signup, no watermark — so a blog post about EMIs, CGPA or PDFs can carry a working tool right where people need it.

How to embed a tool

1. Open the tool you want and expand “Embed this tool on your website” below it.
2. Copy the iframe snippet (it's pre-filled for that tool).
3. Paste it into your page's HTML where you want the tool to appear.

A snippet looks like this:

<iframe src="https://toolhq.dev/embed/percentage-calculator/" title="Percentage Calculator — ToolsHub"
  width="100%" height="520"
  style="border:1px solid #e5e7eb;border-radius:12px;max-width:680px" loading="lazy"></iframe>

Live example

This is the actual embed of the Percentage Calculator — try it:

Customise it

• Height — change the height value to fit, or use auto-resize below.
• Dark mode — add ?theme=dark (or ?theme=light) to the embed URL. Without it, the tool follows the visitor's system setting.
• Auto-resize — add this once on the page and the iframe grows to fit the tool automatically:

<script>
addEventListener("message", function (e) {
  if (e.data && e.data.type === "toolshub:resize") {
    document.querySelectorAll('iframe[src*="/embed/"]').forEach(function (f) {
      if (f.contentWindow === e.source) f.style.height = e.data.height + "px";
    });
  }
});
</script>

What you can embed

The 128+ tools that run fully in the browser are embeddable — calculators (EMI, SIP, CGPA, percentage, GST), converters, PDF and image tools, text utilities and generators. A few tools that need a server (DNS, WHOIS, SSL lookups) can't be embedded. Browse the full tool list and open any tool to grab its embed code.

Frequently asked questions

Is embedding really free?

Yes. You can embed any client-side ToolsHub tool on your site at no cost, with no signup and no watermark. We simply include a small “Powered by ToolsHub” link in the widget.

Does the embedded tool upload my visitors' data?

No. Embeddable tools run entirely in the visitor's browser, exactly as they do on ToolsHub — files and inputs never reach a server. That makes them safe to place on privacy-sensitive pages.

Can I change the size or theme?

Yes. Set the iframe height to fit, or add the optional auto-resize snippet so it grows to fit the tool. Add ?theme=dark (or ?theme=light) to the embed URL to force a colour scheme; otherwise it follows the visitor's system setting.

Which tools can I embed?

The 128+ tools that run fully in the browser — calculators, converters, PDF, image and text tools, generators. A few tools that need a server (DNS, WHOIS, SSL lookups) can't be embedded.

How do I get the embed code for a specific tool?

Open any tool page and expand the “Embed this tool on your website” panel below the tool — it has the exact iframe snippet ready to copy.

Will it slow down my page?

The iframe loads lazily and is lightweight. Because the tool runs on the visitor's device, there's no server round-trip, so it feels instant.