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Free Embeddable Calculators & Tools
for Your Website

Add powerful calculators and tools to your website or blog with a single line of code. No API keys, no signup, no tracking. Free forever.

1
Pick a tool
Choose from the tools below
2
Copy the code
Iframe + a small credit link
3
Paste & publish
Works on any website or blog
⚖️
BMI Calculator
Body Mass Index calculator with metric and imperial support.
Preview
Embed code
<iframe src="https://tools4free.site/embed/bmi-calculator" width="100%" height="700" style="border:1px solid #e8e4db;border-radius:12px" title="BMI Calculator by Tools4Free" loading="lazy"></iframe>
<p style="font-size:13px;font-family:sans-serif;text-align:center;margin-top:8px"><a href="https://tools4free.site/bmi-calculator" target="_blank" rel="noopener">BMI Calculator</a> by <a href="https://tools4free.site" target="_blank" rel="noopener">Tools4Free</a></p>

Please keep the credit link below the tool — it's what keeps Tools4Free free to use.

◫
QR Code Generator
Generate QR codes for URLs, text, and WiFi. Download as PNG.
Preview
Embed code
<iframe src="https://tools4free.site/embed/qr-generator" width="100%" height="600" style="border:1px solid #e8e4db;border-radius:12px" title="QR Code Generator by Tools4Free" loading="lazy"></iframe>
<p style="font-size:13px;font-family:sans-serif;text-align:center;margin-top:8px"><a href="https://tools4free.site/qr-generator" target="_blank" rel="noopener">QR Code Generator</a> by <a href="https://tools4free.site" target="_blank" rel="noopener">Tools4Free</a></p>

Please keep the credit link below the tool — it's what keeps Tools4Free free to use.

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Percentage Calculator
Three modes: what is X% of Y, what percent is X of Y, and percent change.
Preview
Embed code
<iframe src="https://tools4free.site/embed/percentage-calculator" width="100%" height="500" style="border:1px solid #e8e4db;border-radius:12px" title="Percentage Calculator by Tools4Free" loading="lazy"></iframe>
<p style="font-size:13px;font-family:sans-serif;text-align:center;margin-top:8px"><a href="https://tools4free.site/percentage-calculator" target="_blank" rel="noopener">Percentage Calculator</a> by <a href="https://tools4free.site" target="_blank" rel="noopener">Tools4Free</a></p>

Please keep the credit link below the tool — it's what keeps Tools4Free free to use.

💱
Currency Converter
Convert between 30+ currencies with approximate exchange rates.
Preview
Embed code
<iframe src="https://tools4free.site/embed/currency-converter" width="100%" height="600" style="border:1px solid #e8e4db;border-radius:12px" title="Currency Converter by Tools4Free" loading="lazy"></iframe>
<p style="font-size:13px;font-family:sans-serif;text-align:center;margin-top:8px"><a href="https://tools4free.site/currency-converter" target="_blank" rel="noopener">Currency Converter</a> by <a href="https://tools4free.site" target="_blank" rel="noopener">Tools4Free</a></p>

Please keep the credit link below the tool — it's what keeps Tools4Free free to use.

⬡
Password Generator
Cryptographically secure passwords. Configurable length and character sets.
Preview
Embed code
<iframe src="https://tools4free.site/embed/password-generator" width="100%" height="550" style="border:1px solid #e8e4db;border-radius:12px" title="Password Generator by Tools4Free" loading="lazy"></iframe>
<p style="font-size:13px;font-family:sans-serif;text-align:center;margin-top:8px"><a href="https://tools4free.site/password-generator" target="_blank" rel="noopener">Password Generator</a> by <a href="https://tools4free.site" target="_blank" rel="noopener">Tools4Free</a></p>

Please keep the credit link below the tool — it's what keeps Tools4Free free to use.

Why embed Tools4Free on your site?

How to embed a calculator on your website

Copy the iframe code for any tool above and paste it into your HTML, WordPress editor, Notion page, or any website builder that supports custom HTML. The embed is fully responsive and adapts to the container width automatically. Adjust the height attribute if needed for your layout.

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