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Latest from the Affivance Blog
Practical guides built around the questions people search for.
How to Calculate a Mortgage Payment
Learn the basic mortgage payment formula, what principal, interest and loan term mean, and how to use a mortgage calculator.
GuideCompound Interest Explained: A Simple Guide
Understand compound interest, the compounding frequency, and how small changes in time and rate can affect growth.
GuideBMI Calculator Guide: How BMI Is Calculated
Learn how BMI is calculated, what the number means, and why BMI is only a screening measure rather than a diagnosis.
GuideHow to Calculate Percentage Increase and Decrease
A practical guide to percentage change with simple examples for shopping, finance, business and everyday calculations.
GuideHow to Calculate a Loan Payment
Understand the standard amortization formula and the inputs that affect a monthly loan payment.
GuideHow to Compress Images Without Losing Too Much Quality
Learn practical browser-based image compression techniques and when to use JPG, PNG or WebP.
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10 practical browser-based tools.
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6 practical browser-based tools.
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TextText Tools
8 practical browser-based tools.
Popular tools
Word Counter
Count words, characters, sentences and paragraphs.
Open Tool →TextCharacter Counter
Count characters with and without spaces.
Open Tool →TextCase Converter
Convert text to upper, lower, title and sentence case.
Open Tool →TextRemove Duplicate Lines
Remove repeated lines from text.
Open Tool →TextText Sorter
Sort lines alphabetically or numerically.
Open Tool →TextText Reverser
Reverse text, words or lines.
Open Tool →TextText Cleaner
Clean extra spaces and blank lines.
Open Tool →SEOSlug Generator
Create clean SEO-friendly URL slugs.
Open Tool →SEOKeyword Density Checker
Check keyword frequency and density.
Open Tool →TextReading Time Calculator
Estimate reading time from text.
Open Tool →GeneratorLorem Ipsum Generator
Generate placeholder paragraphs.
Open Tool →GeneratorRandom Number Generator
Generate random numbers locally.
Open Tool →GeneratorRandom String Generator
Generate random strings locally.
Open Tool →SecurityPassword Generator
Generate strong random passwords locally.
Open Tool →DeveloperUUID Generator
Generate UUID v4 identifiers locally.
Open Tool →DeveloperJSON Formatter
Format and validate JSON locally.
Open Tool →DeveloperBase64 Encoder & Decoder
Encode and decode UTF-8 Base64.
Open Tool →DeveloperURL Encoder & Decoder
Encode and decode URL components.
Open Tool →DeveloperHTML Encoder & Decoder
Escape and decode HTML entities.
Open Tool →DeveloperAll tools
60 practical browser-based utilities.
Word Counter
Count words, characters, sentences and paragraphs.
Open Tool →TextCharacter Counter
Count characters with and without spaces.
Open Tool →TextCase Converter
Convert text to upper, lower, title and sentence case.
Open Tool →TextRemove Duplicate Lines
Remove repeated lines from text.
Open Tool →TextText Sorter
Sort lines alphabetically or numerically.
Open Tool →TextText Reverser
Reverse text, words or lines.
Open Tool →TextText Cleaner
Clean extra spaces and blank lines.
Open Tool →SEOSlug Generator
Create clean SEO-friendly URL slugs.
Open Tool →SEOKeyword Density Checker
Check keyword frequency and density.
Open Tool →TextReading Time Calculator
Estimate reading time from text.
Open Tool →GeneratorLorem Ipsum Generator
Generate placeholder paragraphs.
Open Tool →GeneratorRandom Number Generator
Generate random numbers locally.
Open Tool →GeneratorRandom String Generator
Generate random strings locally.
Open Tool →SecurityPassword Generator
Generate strong random passwords locally.
Open Tool →DeveloperUUID Generator
Generate UUID v4 identifiers locally.
Open Tool →DeveloperJSON Formatter
Format and validate JSON locally.
Open Tool →DeveloperBase64 Encoder & Decoder
Encode and decode UTF-8 Base64.
Open Tool →DeveloperURL Encoder & Decoder
Encode and decode URL components.
Open Tool →DeveloperHTML Encoder & Decoder
Escape and decode HTML entities.
Open Tool →DeveloperUnix Timestamp Converter
Convert Unix timestamps and dates.
Open Tool →MathPercentage Calculator
Calculate percentages instantly.
Open Tool →MathPercentage Increase / Decrease
Find percentage change.
Open Tool →MathAverage Calculator
Calculate mean, median and mode.
Open Tool →MathRatio Calculator
Simplify and solve ratios.
Open Tool →MathFraction Calculator
Add, subtract, multiply and divide fractions.
Open Tool →MathScientific Calculator
Perform common scientific calculations.
Open Tool →EverydayAge Calculator
Calculate age accurately from dates.
Open Tool →EverydayDate Difference Calculator
Find the difference between two dates.
Open Tool →EverydayDays Between Dates
Count days between dates.
Open Tool →EverydayTime Duration Calculator
Calculate elapsed time.
Open Tool →FinanceTip Calculator
Calculate tips and split bills.
Open Tool →FinanceDiscount Calculator
Calculate sale price and savings.
Open Tool →FinanceSales Tax Calculator
Calculate tax-inclusive and exclusive prices.
Open Tool →FinanceSimple Interest Calculator
Calculate simple interest.
Open Tool →FinanceCompound Interest Calculator
Estimate compound growth.
Open Tool →FinanceLoan Payment Calculator
Estimate loan payments and interest.
Open Tool →FinanceMortgage Calculator
Estimate mortgage payments.
Open Tool →FinanceAuto Loan Calculator
Estimate vehicle loan payments.
Open Tool →FinanceCredit Card Payoff Calculator
Estimate payoff time and interest.
Open Tool →FinanceSavings Goal Calculator
Find monthly savings needed for a target.
Open Tool →HealthBMI Calculator
Calculate adult BMI.
Open Tool →HealthBMR Calculator
Estimate BMR using Mifflin-St Jeor.
Open Tool →HealthCalorie Deficit Calculator
Estimate a daily calorie target.
Open Tool →ConverterLength Converter
Convert length units.
Open Tool →ConverterWeight Converter
Convert weight units.
Open Tool →ConverterTemperature Converter
Convert Celsius, Fahrenheit and Kelvin.
Open Tool →ConverterArea Converter
Convert area units.
Open Tool →ConverterVolume Converter
Convert volume units.
Open Tool →ConverterSpeed Converter
Convert speed units.
Open Tool →ConverterTime Unit Converter
Convert time units.
Open Tool →ImageImage Resizer
Resize images in your browser.
Open Tool →ImageImage Compressor
Compress JPG, PNG and WebP locally.
Open Tool →ImageImage to Grayscale
Convert images to grayscale.
Open Tool →ImageImage Rotate & Flip
Rotate or flip images locally.
Open Tool →ImageImage Cropper
Crop images locally.
Open Tool →ImageImage Watermark
Add a text watermark locally.
Open Tool →DesignColor Picker
Pick HEX, RGB and HSL colors.
Open Tool →DesignCSS Gradient Generator
Create CSS linear gradients.
Open Tool →DesignCSS Box Shadow Generator
Generate CSS box-shadow code.
Open Tool →DesignCSS Text Shadow Generator
Generate CSS text-shadow code.
Open Tool →Why Affivance?
Affivance focuses on useful tools with simple interfaces, local browser processing where practical, clear results and no account requirement for the core tool experience.