Free browser tools that just work
Uzetool is a growing collection of fast, private, browser-based utilities. Everything runs on your device — nothing to install, no accounts, no uploads. New tools are added regularly.
Tools
Pick a tool to get started. More are on the way.
Calculators
Percentage Calculator
Work out percentages, percentage change, tips and discounts instantly — with clear, step-by-step results.
Open tool →Loan & Mortgage Calculator
Estimate monthly loan and mortgage payments, total interest and payoff — with a full amortization schedule.
Open tool →Scientific Calculator
Free online scientific calculator with sin, cos, tan, log, ln, powers, roots, factorial and π — degrees or radians.
Open tool →BMI Calculator
Calculate your Body Mass Index instantly — metric or imperial, with your category and healthy weight range.
Open tool →Age & Date Difference Calculator
Calculate your exact age in years, months and days, or find the difference between any two dates — with total days and weeks.
Open tool →Converters
Unit Converter
Convert length, weight, temperature, volume, area, speed, time and data units instantly — accurate and free.
Open tool →Time Zone Converter
Convert any date and time between time zones worldwide — with live clocks, offsets and daylight saving handled automatically.
Open tool →Currency Converter
Convert between 160+ world currencies with live exchange rates — USD, EUR, GBP, JPY and more, updated daily.
Open tool →Design
Color Picker from Image
Upload or paste an image and grab HEX, RGB, HSL & CSS codes with a pixel-perfect magnifier.
Open tool →Image Compressor
Reduce JPG, PNG & WebP file size before upload — adjust quality, resize, and download smaller images instantly.
Open tool →Image Format Converter
Convert PNG to JPG, JPG to WebP and more — batch convert images instantly in your browser.
Open tool →Image Cropper
Crop JPG, PNG & WebP photos with drag handles, aspect-ratio presets and instant download.
Open tool →Background Remover
Remove image backgrounds with in-browser AI — download transparent PNGs instantly. Nothing uploaded.
Open tool →Favicon Generator
Upload one image and download favicon.ico, Apple Touch Icon, Android icons and site.webmanifest — all sizes instantly.
Open tool →Image to Base64 Converter
Convert images to Base64 data URIs — copy HTML, CSS and JavaScript snippets for inline embedding.
Open tool →Meme Generator
Add top and bottom text to any image with classic Impact font styling — download memes instantly in your browser.
Open tool →EXIF Viewer & Remover
View EXIF metadata in photos and strip GPS, camera info and hidden data before sharing — privacy-focused.
Open tool →Collage Maker
Combine photos into grid layouts — 2, 4, 6 or 9 images with adjustable spacing. Download as JPG or PNG.
Open tool →Social Media Image Resizer
Crop and resize images to Instagram, YouTube, Facebook, TikTok and more — with exact pixel presets.
Open tool →Content
Random Number, Name & Team Picker
Pick random numbers, draw names from a list, or split people into fair teams — with a satisfying spin animation.
Open tool →Word & Character Counter
Count words, characters, sentences and paragraphs instantly — with reading time and SEO meta length guides.
Open tool →Score & skill tests
Reaction Time Test
Click when the screen turns green and get your reaction time in milliseconds — share your ms score and challenge friends.
Open tool →CPS Test & Click Speed Test
Test your click speed and clicks per second (CPS) over 1, 5, 10 or 30 seconds — popular with gamers and Minecraft players.
Open tool →Typing Speed Test (WPM)
Free typing speed test — measure words per minute (WPM) and accuracy in real time. Type, score, share.
Open tool →Spacebar Counter
Press spacebar to count hits or run a 10-second timed test — compete with friends on spacebar speed.
Open tool →Aim Trainer
Click targets as they appear — 30-second rounds with hit score and accuracy. Quick FPS aim practice in your browser.
Open tool →Life & perspective
Life in Weeks Visualizer
Enter your birthday and see your entire life as a grid of week-squares — lived weeks filled in. A powerful memento mori visualization.
Open tool →Boss Toilet Calculator
Enter your boss's salary and watch a live counter tick up while you're on a bathroom break. How much do they earn while you poop?
Open tool →Salary Per Second Calculator
Watch your salary tick up in real time — per second, minute and hour. A live counter that makes abstract pay feel tangible.
Open tool →Phone Life Estimator
Estimate how many days of your life you've spent on your phone — and what that means as a share of your waking hours.
Open tool →Pranks & screen tools
Fake Tip Screen Simulator
Convincing POS-style fake tip screen with absurd presets (30%, 34%, 38%) — launch fullscreen for TikTok-ready pranks.
Open tool →Fake Update Screen
Fullscreen fake Windows or Mac update screen stuck at 3% — the classic "don't turn off your computer" prank.
Open tool →Cracked Screen Prank
Fullscreen vertical color stripes — launch it, then press Esc and show that the display was fine.
Open tool →Fake Loading Screen Generator
Generate a fake loading screen with a progress bar that never finishes — pick a theme, add a message, go fullscreen.
Open tool →Security
Password Strength Checker
Test how strong your password is — live score, checklist, entropy estimate and crack-time analysis. Nothing leaves your browser.
Open tool →Password Generator
Generate strong random passwords and passphrases with crypto-grade randomness — custom length, character options and one-click copy.
Open tool →What these tools are for, and what stays on your device
Who uses them, which numbers never leave the browser, and how the categories differ.
Students use the percentage calculator on a test score, the scientific calculator for classwork, and the word counter against an essay limit. Freelancers use the loan calculator to compare a monthly payment, the currency converter before invoicing a client abroad, and the unit converter when a spec arrives in inches. Developers use the color picker, the image tools, the favicon generator, and the Base64 converter while building a page.
Most tools never send what you type. The password generator uses the browser's crypto.getRandomValues and does not post the result. Text in the word counter, a date of birth, and a photo you crop, compress, or sample a color from stay in that tab. The background remover downloads the @imgly/background-removal model once (about 40 MB, via esm.sh) and then runs locally; the photo is not uploaded. The currency converter is the exception: it fetches a daily mid-market table from ExchangeRate-API (open.er-api.com, USD base) and caches it in localStorage. The amount you type is multiplied on your device and is not sent. Time zones use the browser's IANA data through Intl.DateTimeFormat, not a remote API.
Calculators
Percentage, loan amortization, BMI, age, and the scientific calculator each run a fixed formula in JavaScript.
Converters
Unit conversion multiplies by a published factor — an inch is 0.0254 metres — except temperature, which converts through Celsius with an offset. Currency uses the rate table above. Time zones convert a clock time with the browser's timezone database.
Design
Compress, crop, convert format, pick a color, build a favicon, make a collage or meme, read EXIF, resize for social networks, or encode Base64. The only network step in this group is the background-removal model download.
Content
The word counter and the random picker work on text or a name list you paste in. That text is not uploaded.
Score and skill tests
Reaction time, clicks per second, typing speed, the spacebar counter, and the aim trainer time your input in the page. A score is not stored on a server.
Life and perspective
Life in weeks, salary per second, the phone-life estimate, and the boss-toilet calculator are arithmetic on numbers you type. They illustrate a figure, not financial, medical, or employment advice.
Pranks and screen tools
The fake tip screen, stuck update, loading bar, and glitch pattern are drawings in the browser. They do not change the operating system or the display.
Security
The password generator uses cryptographic randomness in the browser. The strength checker scores the string you type on the page and does not transmit it.