Free to embed

Put OhoTool widgets on your site

Add a live calculator, converter, or generator to your website or blog with one line of HTML. They run in your visitor’s browser, resize to fit, and stay free — no sign-up, no API key.

Step 1

Pick a tool

Choose any widget below and hit “Embed this tool.”

Step 2

Copy the code

Grab the one-line snippet from the dialog.

Step 3

Paste it in

Drop it into your page’s HTML. It resizes to fit — done.

Calculators

Health, finance, and everyday math — great for niche blogs.

BMI Calculator

Calculate your Body Mass Index in metric or imperial.

Open

Calorie Calculator

Estimate your daily calories (TDEE).

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BMR & Calorie Calculator

Estimate daily calories from BMR and activity.

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Compound Interest Calculator

See how savings grow over time.

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Loan & EMI Calculator

Estimate monthly loan payments, interest, and total cost.

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Percentage Calculator

Work out percentages, ratios, and percentage change.

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Age Calculator

Calculate exact age in years, months, and days.

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Tip Calculator

Calculate the tip and split a bill between people.

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Discount Calculator

Find the sale price and how much you save.

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Ideal Weight Calculator

Find a healthy weight range for your height.

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GPA Calculator

Calculate your GPA on a 4.0 scale.

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Fraction Calculator

Add, subtract, multiply, and divide fractions.

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GST / VAT / Sales Tax Calculator

Add or remove GST, VAT, or sales tax from a price.

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Aspect Ratio Calculator

Resize dimensions while keeping the same ratio.

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Time Calculator

Add or subtract hours, minutes, and seconds.

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Sales Tax Calculator

Add or remove sales tax from any price.

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Average Calculator

Find the mean, median, mode, and range of any numbers.

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Love Calculator

Enter two names for a fun love-match score.

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Generators & utilities

QR codes, passwords, colors, text tools, and more.

QR Code Generator

Create and download a QR code for any link or text.

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Password Generator

Create strong, random passwords with custom rules.

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Hash Generator

Compute SHA-1, SHA-256, SHA-384, and SHA-512 hashes.

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Bcrypt Generator

Generate and verify bcrypt password hashes — Laravel & PHP compatible.

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UUID Generator

Generate random UUID v4 identifiers, one or many at a time.

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Lorem Ipsum Generator

Generate placeholder text — paragraphs, sentences, or words.

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HEX to RGB Converter

Convert colors between HEX, RGB, and HSL with a live preview.

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Color Contrast Checker

Check WCAG contrast between two colors.

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Word Counter

Count words, characters, sentences, and reading time.

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Case Converter

Convert text between UPPER, lower, Title, camelCase, and more.

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Random Number Generator

Generate random numbers in any range.

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Password Strength Checker

Test how strong a password is, privately.

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Number to Words

Convert numbers into words — and amounts into currency text.

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cURL to Code

Convert a cURL command to JavaScript fetch or Python requests.

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JSON to JSON Schema

Generate a JSON Schema from an example JSON object.

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PX to REM Converter

Convert between px, rem, and em for CSS.

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robots.txt Generator

Create a robots.txt file for your website.

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JSON to TOML

Convert between JSON and TOML both ways.

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Unit converters

Length, weight, temperature, and more — the classic embeddable widget.

Feet to Centimeters

Convert feet (ft) to centimeters (cm).

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Centimeters to Feet

Convert centimeters (cm) to feet (ft).

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Feet to Meters

Convert feet (ft) to meters (m).

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Meters to Feet

Convert meters (m) to feet (ft).

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Centimeters to Inches

Convert centimeters (cm) to inches (in).

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Inches to Centimeters

Convert inches (in) to centimeters (cm).

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Millimeters to Inches

Convert millimeters (mm) to inches (in).

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Inches to Millimeters

Convert inches (in) to millimeters (mm).

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Kilometers to Miles

Convert kilometers (km) to miles (mi).

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Miles to Kilometers

Convert miles (mi) to kilometers (km).

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Meters to Yards

Convert meters (m) to yards (yd).

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Yards to Meters

Convert yards (yd) to meters (m).

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Feet to Inches

Convert feet (ft) to inches (in).

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Inches to Feet

Convert inches (in) to feet (ft).

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Kilograms to Pounds

Convert kilograms (kg) to pounds (lb).

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Pounds to Kilograms

Convert pounds (lb) to kilograms (kg).

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Grams to Ounces

Convert grams (g) to ounces (oz).

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Ounces to Grams

Convert ounces (oz) to grams (g).

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Kilograms to Stone

Convert kilograms (kg) to stone (st).

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Stone to Kilograms

Convert stone (st) to kilograms (kg).

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Pounds to Ounces

Convert pounds (lb) to ounces (oz).

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Ounces to Pounds

Convert ounces (oz) to pounds (lb).

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Celsius to Fahrenheit

Convert degrees Celsius (°C) to degrees Fahrenheit (°F).

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Fahrenheit to Celsius

Convert degrees Fahrenheit (°F) to degrees Celsius (°C).

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Celsius to Kelvin

Convert degrees Celsius (°C) to kelvin (K).

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Kelvin to Celsius

Convert kelvin (K) to degrees Celsius (°C).

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Fahrenheit to Kelvin

Convert degrees Fahrenheit (°F) to kelvin (K).

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Kelvin to Fahrenheit

Convert kelvin (K) to degrees Fahrenheit (°F).

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Want a tool that isn’t here?

Tell us what you’d embed and we’ll consider building it — most requests ship fast.

Request a tool