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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
One iframe tag — that's it
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" frameborder="0"></iframe>
◫
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" frameborder="0"></iframe>
%
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" frameborder="0"></iframe>
💱
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" frameborder="0"></iframe>
⬡
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" frameborder="0"></iframe>

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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