Tools That Run in Your Browser
Free, self-built utilities for text, hardware testing, and audio. No installs, no sign-ups, nothing ever leaves your device.
Every tool here was built to solve one specific, everyday problem well, not to upsell a bigger product. Whether you need a quick unit conversion, a way to test a new monitor for dead pixels, or a private place to strip metadata from a photo, you can open the tool and get an answer in seconds, with no account and no waiting on a server.
163 tools across 7 tags, and every one of them is free.
Runs in your browser
Most tools process everything locally. Nothing you type or upload has to leave your device.
Free, no catch
No paid tier, no usage caps, no watermarks on what you export or download.
No sign-up needed
Open any tool and use it right away. An account is optional, only for syncing across devices.
10 languages
The whole site and every tool are fully translated, switchable from the navigation bar.
Featured Tools
Calculators
Box and Whisker Plot Maker
Turn one or more datasets into box-and-whisker plots with five-number summary, mean, standard deviation, and outlier detection.
FreeImage
Blurred Frame Images Generator
Fit your photo into a square or other aspect ratio without cropping, filling the extra space with a blurred, zoomed copy of the image.
FreeImage
Blur Image
Blur an image in your browser using Box, Gaussian, Motion, or Radial blur, then download the result.
FreeCalculators
Blood Donation Time Calculator
Calculate your next eligible blood donation date based on your last donation and donation type, using common waiting-period guidelines.
FreeImage
Blend Colors
Blend two colors together with an adjustable balance, using simple RGB, gamma-correct, or HSL blending.
FreeText
Blake2b Hash Generator
Compute the BLAKE2b hash of text or a file in your browser, with adjustable output length and optional keyed hashing (MAC).
FreeCalculators
Bitwise Calculator
Perform AND, OR, XOR, NAND, NOR, XNOR, NOT, and bit shift operations on binary, octal, decimal, or hexadecimal numbers.
FreeText
Bionic Reading Converter
Convert any text into bionic reading format by bolding the first portion of each word to help you read faster and focus better.
FreeGame
Bingo Card Generator
Generate unique, print-ready 5x5 bingo cards with classic 1-75 numbers, custom words, or emojis, in a choice of color themes.
FreeCalculators
Binary Calculator
Add, subtract, multiply, and divide binary numbers directly, with results shown in binary and decimal, plus a binary/decimal converter.
FreeCalculators
Big Number Calculator
Perform exact arithmetic on numbers far larger than a normal calculator can handle: addition, subtraction, multiplication, division, exponentiation, square root, factorial, modulo, GCD, and LCM.
FreeCalculators
Betting Odds Converter
Convert betting odds between American, Decimal, Fractional, and implied probability formats, with payout, profit, and bookmaker margin (vig) calculations.
FreeText
Bcrypt Hash Generator Checker
Generate and verify bcrypt password hashes entirely in your browser using WebAssembly, with an adjustable cost factor and salt.
FreeCalculators
Battery Life Calculator
Estimate how long a battery will last given its capacity, your device's power draw, and a real-world efficiency factor.
FreeCalculators
Basic Calculator
A simple, free online calculator for everyday arithmetic, with memory storage, scientific-notation entry, and keyboard support.
FreeText
Number Base Converter
Convert a number between binary, octal, decimal, hexadecimal, BCD, Gray Code, and any custom base from 2 to 36, all at once from a single input.
FreeText
Base64 Encode/Decode
Encode text to base64 or decode base64 back to text, live as you type, with full Unicode support and an optional URL-safe variant.
FreeCalculators
Pressure Converter
Convert pressure between Pa, kPa, MPa, bar, PSI, atm, torr, and inHg all at once, with a visual gauge and presets for tires, bikes, and scuba tanks.
FreeText
Bar Graph Maker
Turn simple label,value data into a customizable bar chart with 8 color themes, orientation, sorting, negative-value support, instant stats, and SVG/PNG export.
FreeText
Bandwidth Calculator
Convert between data units, estimate file transfer time, size website bandwidth from traffic, and convert between a monthly data allowance and a sustained connection speed.
FreeText
Backronym Generator
Turn any acronym or word into a backronym across 6 tones and 5 sentence patterns, with custom words per letter and Memorability/Pronounceability scoring.
FreeCalculators
Average Return Calculator
Calculate a true annualized investment return from irregular, dated cash flows using XIRR, or chain together multiple known returns over different holding periods into one annualized figure.
FreeCalculators
Average Rate Of Change Calculator
Calculate the average rate of change of any function f(x) (polynomials, trig, logs, roots, and more) over an interval [a, b], with a graph of the function and its secant line.
FreeCalculators
Auto Loan Calculator
Estimate a car loan's monthly payment, total interest, and total cost of ownership, accounting for down payment, trade-in (including negative equity), incentives, sales tax, and fees.
Frequently asked questions
›Is WMW really free? What's the catch?
Yes, every tool is completely free with no usage limits, no watermarks, and no hidden paid tier. Most tools run entirely as JavaScript in your browser, so there is no server cost per use to recover, which is what lets us keep everything free.
›Do I need to create an account to use the tools?
No. Every tool works immediately with no sign-up. Creating a free account is optional and only unlocks a few conveniences, like syncing your favorites and recently-used tools across devices instead of storing them in this one browser.
›Is my data safe? Do you upload my files or text anywhere?
Most tools, especially anything working with images, audio, or sensitive text, process everything locally in your browser using standard web APIs and never send your file or input to a server. Any tool that does need a server round-trip says so directly on the page.
›What kinds of tools are available?
Calculators covering everyday math, finance, and health; text tools for counting, converting, and transforming; image editors for cropping, filtering, and adjusting; hardware and display test tools for checking a monitor, keyboard, or webcam; and generators for things like passwords, hashes, and random picks.
›Which languages is the site available in?
The interface and every tool are fully translated into 10 languages. Use the language switcher in the top navigation bar to change it at any time; your choice is remembered for future visits.