Free browser-based utilities

All Free Online Tools

Find the right tool in seconds. Search our complete collection of fast, free, and easy-to-use browser tools and calculators.

150 Tools
150 tools available Free to use No registration

Text Tools

Write, clean, transform, and analyze text directly in your browser.

16 tools View category
Word Counter Count words, characters, sentences, and paragraphs instantly in your browser. Open tool Case Converter Change text to uppercase, lowercase, title case, or sentence case. Open tool Text to Slug Converter Turn a title or phrase into a clean lowercase URL slug. Open tool Remove Line Breaks Replace unwanted line breaks with clean, normalized spaces. Open tool Duplicate Line Remover Remove repeated lines while preserving the first occurrence of each line. Open tool Text Sorter Sort non-empty lines alphabetically for cleaner lists and datasets. Open tool Comma Separator Convert words or line-separated values into a comma-separated list. Open tool Text Repeater Repeat text up to 1,000 times with one result per line. Open tool Lorem Ipsum Generator Generate configurable placeholder paragraphs for layouts and design mockups. Open tool Random Word Generator Generate a configurable list of random general-purpose English words. Open tool Readability Checker Estimate Flesch reading ease, grade level, reading time, sentences, words, and syllables. Open tool Remove Extra Spaces Normalize repeated spaces and tabs while preserving intentional paragraph breaks. Open tool Find and Replace Text Find literal text and replace all matching occurrences with optional case sensitivity. Open tool Reverse Text Reverse text by characters, words, or lines without uploading it. Open tool Line Counter Count total lines, non-empty lines, blank lines, words, and characters. Open tool Keyword Extractor Extract the most frequent meaningful words from pasted English text. Open tool

Image Tools

Convert, resize, optimize, and enhance images with privacy-friendly browser processing.

20 tools View category
Image Compressor Compress JPG, PNG, and WebP images locally with adjustable quality. Open tool Image Resizer Resize an image to exact pixel dimensions directly in your browser. Open tool Image Cropper Crop an image using precise X, Y, width, and height values. Open tool Rotate Image Rotate an uploaded image by 90 degrees and save the result. Open tool Flip Image Flip an image horizontally and download the processed copy. Open tool Image Enlarger Create a two-times enlarged copy of an uploaded image. Open tool Image to Base64 Convert an image file into a reusable Base64 data URL. Open tool Base64 to Image Preview and download a valid Base64 image data URL. Open tool JPG to PNG Converter Convert a JPG image into PNG format locally. Open tool PNG to JPG Converter Convert a PNG image into a quality-adjustable JPG file. Open tool WebP to JPG Converter Convert a WebP image into a compatible JPG file. Open tool PNG to WebP Converter Convert a PNG image into compact WebP format. Open tool JPG to WebP Converter Convert a JPG image into efficient WebP format. Open tool WebP to PNG Converter Convert a WebP image into lossless PNG format. Open tool Grayscale Image Converter Convert a JPG, PNG, or WebP image to grayscale locally. Open tool Image Brightness Adjuster Increase or reduce image brightness with an adjustable percentage. Open tool Image Contrast Adjuster Adjust image contrast and export the processed result. Open tool Add Text Watermark to Image Add a configurable text watermark to an image inside the browser. Open tool Square Image Maker Place an image on a square canvas with a selectable background color. Open tool Image Aspect Ratio Calculator Reduce an image ratio and calculate a matching width or height. Open tool

Developer Tools

Format data, test code, generate values, and speed up everyday development work.

20 tools View category
JSON Formatter Validate and format JSON with readable two-space indentation. Open tool JSON Validator Check whether pasted JSON is syntactically valid. Open tool JSON Minifier Remove unnecessary whitespace from valid JSON data. Open tool JSON Viewer Display valid JSON in an easy-to-read formatted structure. Open tool JSON to CSV Converter Convert an array of flat JSON objects into CSV rows. Open tool CSV to JSON Converter Convert standards-compliant CSV, including quoted commas, into JSON. Open tool JSON to XML Converter Convert valid JSON data into an XML document. Open tool XML to JSON Converter Parse XML and return a structured JSON representation. Open tool Base64 Encoder Encode Unicode text as Base64 entirely in your browser. Open tool Base64 Decoder Decode Base64 into readable Unicode text. Open tool UUID Generator Generate cryptographically random version 4 UUID values. Open tool Password Generator Create strong random passwords with configurable length and character sets. Open tool Regular Expression Tester Test JavaScript regular expressions, flags, matches, and capture groups. Open tool Unix Timestamp Converter Convert Unix seconds to UTC/local dates and date-time values back to Unix time. Open tool Text Diff Checker Compare two texts line by line and identify additions, removals, and unchanged lines. Open tool SHA-256 Generator Generate a SHA-256 hexadecimal digest locally using the Web Crypto API. Open tool HTML to Markdown Converter Convert common HTML headings, links, lists, emphasis, and paragraphs to Markdown. Open tool Markdown to HTML Converter Convert common Markdown headings, lists, links, emphasis, and paragraphs to safe HTML text. Open tool JSON String Escaper Escape text as a valid JSON string value. Open tool JSON String Unescaper Decode a quoted JSON string into its original readable text. Open tool

Website Tools

Inspect URLs, create web assets, and improve technical SEO and website quality.

18 tools View category
URL Encoder Percent-encode text for safe use inside a URL. Open tool URL Decoder Decode percent-encoded URL text into readable characters. Open tool HTML Encoder Escape HTML-sensitive characters for safe display as text. Open tool HTML Decoder Convert HTML character entities back into readable text. Open tool URL Parser Inspect a URL's protocol, host, path, query parameters, and fragment. Open tool UTM URL Builder Add campaign source, medium, name, term, and content parameters to a URL. Open tool Keyword Density Checker Measure repeated words and their percentage within pasted text. Open tool Meta Tag Generator Create title, description, canonical, robots, and viewport meta tags. Open tool Robots.txt Generator Build a simple robots.txt file with crawl and sitemap directives. Open tool .htaccess Redirect Generator Generate Apache 301 redirect rules for old and new URLs. Open tool HTTP Status Code Checker Request a public URL from WordPress and report its final HTTP response code. Open tool Redirect Checker Check the first HTTP response and Location header for a public URL. Open tool HTTP Headers Checker Retrieve sanitized response headers from a public website URL. Open tool Page Size Checker Estimate HTML response size using Content-Length or a capped download. Open tool Domain to IP Lookup Resolve a valid public domain name to its server IP address. Open tool Google SERP Snippet Preview Preview a desktop-style search result title, URL, and meta description. Open tool Canonical Tag Generator Validate a canonical URL and generate its link element. Open tool Hreflang Tag Generator Generate hreflang link tags from language codes and absolute URLs. Open tool

Unit Converters

Convert common measurement, storage, speed, temperature, and data units accurately.

20 tools View category
Length Converter Convert metric and imperial length units with standard factors. Open tool Area Converter Convert square units, acres, and hectares accurately. Open tool Weight Converter Convert kilograms, pounds, ounces, grams, and tonnes. Open tool Volume Converter Convert liters, gallons, cups, pints, quarts, and cubic meters. Open tool Temperature Converter Convert Celsius, Fahrenheit, and Kelvin temperatures. Open tool Time Converter Convert seconds, minutes, hours, days, weeks, months, and years. Open tool Digital Storage Converter Convert bits, bytes, kilobytes, megabytes, gigabytes, and terabytes. Open tool Speed Converter Convert meters per second, kilometers per hour, miles per hour, knots, and feet per second. Open tool Pressure Converter Convert pascals, kilopascals, bar, PSI, atmospheres, and torr. Open tool Electric Current Converter Convert amperes, milliamperes, microamperes, and kiloamperes. Open tool Voltage Converter Convert volts, millivolts, and kilovolts. Open tool Power Converter Convert watts, kilowatts, megawatts, and mechanical horsepower. Open tool Energy Converter Convert joules, calories, watt-hours, and kilowatt-hours. Open tool Angle Converter Convert degrees, radians, and gradians. Open tool Frequency Converter Convert hertz, kilohertz, megahertz, gigahertz, and revolutions per minute. Open tool Torque Converter Convert newton-metres, pound-feet, pound-inches, and kilogram-force metres. Open tool Electric Charge Converter Convert coulombs, ampere-hours, milliampere-hours, and microampere-hours. Open tool Data Transfer Rate Converter Convert bits and bytes per second across common decimal and binary rates. Open tool Fuel Economy Converter Convert L/100 km, km/L, US MPG, and Imperial MPG. Open tool CSS Unit Converter Convert px, rem, em, pt, pc, inches, centimetres, and millimetres with a configurable base size. Open tool

Everyday Calculators

Handle dates, percentages, tips, discounts, grades, and common daily calculations.

12 tools View category
Age Calculator Calculate exact age in years, months, and days between two dates. Open tool Percentage Calculator Calculate a percentage of any numeric value. Open tool Average Calculator Find the arithmetic mean and count of a list of numbers. Open tool Sales Tax Calculator Calculate sales tax and the total price after tax. Open tool Margin Calculator Calculate profit, profit margin, and markup from revenue and cost. Open tool Discount Calculator Calculate discount amount and final price after discount. Open tool CPM Calculator Calculate advertising cost per one thousand impressions. Open tool Loan Calculator Estimate monthly payment, total payment, and interest for a fixed-rate loan. Open tool GST Calculator Calculate GST amount and the total including GST. Open tool Probability Calculator Calculate simple probability from favorable and total outcomes. Open tool Time Card Calculator Total daily work hours and separate regular and overtime hours. Open tool Grade Calculator Calculate percentage grade and a configurable standard letter-grade estimate. Open tool

Finance Calculators

Estimate payments, fees, returns, taxes, savings, and other everyday financial values.

18 tools View category
Credit Card Payoff Calculator Estimate payoff time and total interest from balance, APR, and monthly payment. Open tool Mortgage Calculator Estimate principal-and-interest mortgage payments from loan amount, rate, and term. Open tool Compound Interest Calculator Project investment growth with contributions and selectable compounding frequency. Open tool Future Value Calculator Calculate the future value of a present amount using compound growth. Open tool Personal Loan Calculator Estimate payment and interest for a fixed-rate personal loan. Open tool Refinance Calculator Compare current and replacement loan payments and estimate refinance break-even time. Open tool HELOC Payment Calculator Estimate interest-only and amortizing payments for a home equity line of credit. Open tool Inflation Calculator Estimate future cost and purchasing-power change using an annual inflation rate. Open tool Savings Goal Calculator Estimate the monthly saving needed to reach a target amount. Open tool Auto Down Payment Calculator Calculate vehicle down payment, taxes, fees, and estimated financed amount. Open tool CD Calculator Estimate certificate-of-deposit maturity value and interest earned. Open tool IRA Growth Calculator Project an IRA balance from current savings, annual contributions, return, and years. Open tool Declining Balance Asset Depreciation Calculator Build a declining-balance depreciation schedule down to a specified salvage value. Open tool Straight-Line Depreciation Calculator Calculate annual depreciation, accumulated depreciation, and book value. Open tool CD Ladder Calculator Split a deposit across evenly spaced CD maturities and estimate each maturity value. Open tool Rent Affordability Calculator Estimate affordable monthly rent from income, debt, and configurable affordability ratios. Open tool Credit Card Fee Calculator Calculate percentage and fixed processing fees, net proceeds, and gross-up amount. Open tool Monthly Budget Calculator Add major monthly expense categories and calculate remaining income. Open tool

Math & Science Calculators

Work through geometry, statistics, algebra, probability, and science calculations.

11 tools View category
Adding Fractions Calculator Add two fractions and reduce the result to lowest terms. Open tool LCM Calculator Find the least common multiple of two or more integers. Open tool Right Triangle Calculator Calculate hypotenuse, area, perimeter, and acute angles from two legs. Open tool Sample Size Calculator Estimate survey sample size from confidence level, margin of error, and population. Open tool Scientific Notation Calculator Convert a number to normalized scientific and engineering notation. Open tool Percentage Increase/Decrease Calculator Measure absolute and percentage change between an old and new value. Open tool Kinetic Energy Calculator Calculate kinetic energy from mass and velocity using standard SI units. Open tool Ideal Gas Law Calculator Solve pressure, volume, moles, or temperature using the ideal gas law. Open tool Speed Calculator Calculate speed from distance and elapsed time using selectable distance units. Open tool Slope Calculator Calculate rise-over-run slope, grade percentage, angle, and ratio. Open tool Fraction to Decimal Calculator Convert a fraction to decimal and percentage form. Open tool

Engineering Calculators

Solve practical electrical, mechanical, and engineering calculations quickly.

7 tools View category
555 Timer Calculator Calculate astable 555 timer frequency, period, and duty cycle. Open tool Current Divider Calculator Calculate current through two parallel resistors from total current. Open tool RC Time Constant Calculator Calculate RC time constant and approximate five-time-constant settling time. Open tool RC Low-Pass/High-Pass Filter Calculator Calculate RC cutoff frequency from resistance and capacitance. Open tool Electricity Calculator Calculate power, energy use, and estimated electricity cost. Open tool Horsepower Calculator Convert torque and rotational speed into mechanical horsepower. Open tool Reynolds Number Calculator Calculate Reynolds number from density, velocity, characteristic length, and dynamic viscosity. Open tool

Construction Calculators

Estimate concrete, materials, dimensions, and quantities for building projects.

4 tools View category
Carpet Calculator Estimate room area and carpet quantity including a waste allowance. Open tool Tile Calculator Estimate tile count from surface size, tile size, and waste allowance. Open tool Tire Size Comparison Calculator Compare two metric tire sizes, diameters, circumferences, and speedometer difference. Open tool Cubic Yards Calculator Calculate cubic feet and cubic yards from length, width, and depth. Open tool

Health Calculators

Explore general health, nutrition, body, and fitness estimates for educational use.

4 tools View category
BMI Calculator Calculate adult body mass index from weight and height with category guidance. Open tool BMR Calculator Estimate adult basal metabolic rate using the Mifflin-St Jeor equation. Open tool Calories Burned Calculator Estimate activity calories from MET value, body weight, and duration. Open tool Daily Fat Intake Calculator Convert a chosen percentage of daily calories into estimated grams of fat. Open tool