All Tools
Browse all 15 free online tools — calculators, converters, formatters, and validators. Every tool runs entirely in your browser, is free to use, and needs no sign-up.
Calculators
View categoryAge Calculator
Calculate your exact age in years, months, and days instantly. Find out how old you are and when your next birthday is with our free online age calculator.
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Percentage Calculator
Calculate percentages quickly and easily. Find X% of Y, what percent X is of Y, or the percentage change between two numbers.
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Date Calculator
Calculate the number of days, weeks, and months between two dates or add and subtract days from any date. Free and instant.
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Time Calculator
Add or subtract hours, minutes, and seconds or convert between time units instantly. Free online time calculator.
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Discount Calculator
Calculate the final price after a discount and see how much you save. Enter the original price and discount percentage to get instant results.
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Formatters & Validators
View categoryJSON Formatter
Format, prettify, or minify JSON data instantly. Paste your JSON and get clean, readable output with customizable indentation.
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JSON Validator
Validate your JSON data instantly. Get clear error messages for invalid JSON and see type, size, and depth info for valid JSON.
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Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 strings instantly. Supports UTF-8 characters. Free, fast, and runs entirely in your browser.
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Word Counter
Count words, characters, sentences, and paragraphs in your text. See estimated reading time. Free and instant.
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Character Counter
Analyze your text with a detailed character breakdown: letters, digits, spaces, punctuation, uppercase, lowercase, and more.
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Converters
View categoryImage to WebP Converter
Convert JPG, PNG, GIF, and other images to WebP format instantly. Adjust quality and reduce file size. Runs entirely in your browser.
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JPG to PNG Converter
Convert JPG and other images to PNG format instantly. Lossless conversion that runs entirely in your browser. No upload required.
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Bytes Converter
Convert between bytes, kilobytes, megabytes, gigabytes, terabytes, and petabytes instantly. Free online data size converter.
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Unit Converter
Convert between length, weight, and volume units instantly. Supports metric and imperial units. Free and fast.
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Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin instantly. Free online temperature converter with precise results.
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