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.
Recently Used
View allFeatured Tools
Calculators
Auto Lease Calculator
Estimate a car lease's monthly payment with a full depreciation/finance/tax breakdown, solve for the max price that fits a target payment, and convert between money factor and APR.
FreeCalculators
At Bats Per Home Run Calculator
Calculate a baseball player's AB/HR power-hitting ratio, see its performance tier, compare against real MLB career leaders, and solve for the at-bats or home runs needed to hit a target ratio.
FreeHardware
Refresh Rate Test
Measure your display's real, live refresh rate right in your browser using requestAnimationFrame timing, and catch a monitor advertised at 144Hz or higher that is really only running at 60Hz.
FreeHardware
Greyscale Test
Check a display for banding, shadow crushing, and highlight clipping with a real continuous 0-255 grey gradient, an interactive value readout, and a dedicated near-white patch set.
FreeHardware
Burn-in Test
Reveal OLED, plasma, or other display burn-in with solid gray, black, and white fields, plus a Flicker Boost mode that alternates gray shades to make faint marks easier to spot.
FreeHardware
Dead Pixel Test
Cycle full-screen through 9 solid colors to spot dead, bright, or stuck pixels on any monitor, laptop, phone, or TV, with an auto-play mode for hands-free scanning.
FreeCalculators
Screen Size Calculator
See your screen's real resolution and pixel ratio live, and calculate PPI, pixel pitch, and physical size in inches or centimeters from any diagonal size and resolution.
FreeHardware
Flicker Test
A clean reference screen and step-by-step instructions for detecting PWM backlight flicker with your phone camera, plus a strobe reference.
FreeHardware
Gamma Calibration
Estimate your display's effective gamma with the classic stripe-vs-solid-patch test across five candidate gamma values, sRGB 2.2 marked.
FreeHardware
Blooming Test
Test your Mini LED or FALD display for blooming with a star field, center, corner, and edge dot patterns and adjustable dot size.
FreeHardware
Brightness Test
Test your screen with a 10-step brightness ladder and a 9-zone fullscreen uniformity check to spot clouding or uneven backlighting.
FreeHardware
Color Accuracy Test
Play an interactive color-matching game: reproduce a target color with RGB sliders and get a perceptual accuracy score.
FreeHardware
Color Banding Test
See exactly what 6-bit vs 8-bit color banding looks like with an honest, adjustable mathematical quantization simulation.
FreeHardware
Gradient Test
Check your screen for color banding with grayscale, RGB channel, radial, and hue wheel gradient patterns, in fullscreen.
FreeHardware
P3 Gamut Test
Compare sRGB against Display P3 across 12 hues around the color wheel to see exactly where wide-gamut displays show more vivid color.
FreeHardware
sRGB Color Test
Check your display against a 24-patch sRGB reference set: primaries, memory colors, and a neutral grey ramp, with a fullscreen patch view.
FreeHardware
RGB Channel Test
Test your screen for dead, stuck, or hot pixels with pure red/green/blue channel isolation plus any custom color via hex or picker.
FreeHardware
Backlight Bleed Test
Test your LCD screen for backlight bleed with a full-screen pure black pattern and a 3x3 scan grid, plus IPS glow guidance.
FreeHardware
Black Level Test
Test how well your screen distinguishes near-black shades with 12 labeled RGB patches and a fullscreen single-patch view.
FreeHardware
Screen Tearing Test
Test your screen for tearing with sweeping bars at an adjustable frame-locked speed, plus a VSync/FreeSync/G-Sync explainer.
FreeHardware
Touch Screen Test
Test a touchscreen with multi-touch visualization, a free-draw precision canvas, and a dead-zone grid coverage scan.
FreeHardware
HDR Test
Check what your browser and display report about HDR and wide color gamut support, with a real sRGB vs Display P3 visual comparison.
FreeHardware
Ghosting Test
Test your monitor for screen ghosting and motion blur with a moving block, scrolling text, or fine-line pattern at an adjustable speed.
FreeHardware
Scroll Test
Test your mouse scroll wheel or trackpad with live direction, delta values, speed, and automatic wheel chatter detection.
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.