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
3D Surface Plotter
Plot any function z = f(x, y), from a paraboloid to a saddle to a Gaussian, as a rotatable, color-coded 3D wireframe surface. Free, private, runs in your browser.
FreeCalculators
3D Distance Calculator
Find the straight-line distance between two points in 3D space, with midpoint, 2D, and Manhattan distance breakdowns included. Free, private, runs in your browser.
FreeGame
24 Game Solver & Trainer
Solve the classic 24 Game instantly, or practice against the clock with an auto-generated, guaranteed-solvable puzzle and live scoring. Free, private, runs in your browser.
FreeCalculators
1099 Tax Calculator
Estimate your self-employment tax and federal income tax on 1099 income, with a quarterly payment breakdown and real IRS deadline dates. Free, private, runs in your browser.
FreeCalculators
0-60 & Quarter Mile Calculator
Estimate a car's quarter mile time and trap speed from its horsepower and weight, with a power-to-weight breakdown and reference-car comparison. Free, private, runs in your browser.
FreeCalculators
1031 Exchange Calculator
Estimate deferred and taxable gain on a 1031 like-kind property exchange, with a recapture vs. capital gains tax breakdown and a 45/180-day deadline tracker. Free, private, runs in your browser.
FreeGame
Spin the Wheel (Wheel of Names)
Turn any list into a spinning wheel and get a fair random pick in seconds. Free, no sign-up, everything runs in your browser.
FreeGame
Click Speed Test (CPS Test)
The classic click test: click as fast as you can for 1 to 100 seconds with Left Click, Right Click, or Spacebar modes. Tracks your personal best for each mode and duration, your best 1-second burst, and gives you a rank title from Turtle to Godlike Clicker.
FreeVideo
Webcam Video Recorder
A real online camera in your browser: record video with optional microphone audio, take photos, choose your resolution (480p/720p/1080p), pause and resume, add a 3-second countdown, and download everything as standard video or PNG files.
FreeMusic
Voice Recorder
Record audio from your microphone right in the browser: live level meter and waveform while recording, pause/resume, multiple takes with a visual waveform, rename, playback, and download as a standard audio file.
FreeHardware
Battery Health
Live battery percentage, charging state, and time estimates, plus a session-based full-charge runtime estimate and cycle usage tracker, low-battery and full-charge alerts, battery care tips, and direct steps to check your real battery health on Windows, macOS, Chromebook, and iPhone.
FreeHardware
Screen & Monitor Tester
Check a laptop, monitor, or TV before you buy it secondhand: dead/stuck pixel sweep, light bleed and IPS glow test, burn-in and banding check, refresh rate measurement, motion/ghosting test, and a black/white level test.
FreeHardware
Keyboard Tester
Test every key on your keyboard in the browser: a full 101-key visual layout, key/code/modifier details, rollover and anti-ghosting stats, chatter detection, and a tested-key progress tracker.
FreeMusic
Pitch Detector
A real-time instrument and vocal tuner in your browser: note name, frequency, and cents deviation from your microphone, with guitar/bass/ukulele/violin presets, adjustable A4 reference pitch, and a pitch history graph.
FreeHardware
Mouse Test
Test every part of your mouse in the browser: buttons and side buttons, double-click chatter detection, a click speed (CPS) test, scroll wheel, drag and drop, cursor polling rate, and a click accuracy game.
FreeHardware
Speaker & Headphone Test
Test your speakers and headphones right in the browser: left/right channel checks, a stereo test, a bass tone, and a 20 Hz to 20,000 Hz frequency sweep, all generated live with the Web Audio API.
FreeHardware
Webcam Test
Test your camera and microphone right in the browser: live preview, device switching, resolution and FPS readout, a mic level meter, and snapshot capture.
FreeText
List Randomizer
Shuffle any list, pick random winners for giveaways, and split entries into even groups, all in your browser with an unbiased Fisher-Yates shuffle.
FreeText
Line Counter
An advanced line counter that instantly analyzes your pasted text: duplicate/empty line detection, comment line filtering, regex-powered find & replace, sorting, and prefix/suffix insertion.
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.