UD5 Toolkit
Tap Tempo BPM Detector - Online Find Beats Per Minute
Tap any key to measure beats per minute. Displays average BPM and beat interval in milliseconds. Essential for DJs and music production. No extra permissions.
Reaction Time Test - Online Click & Sound
Reaction Time Test
Online click & sound reflex measurement â accurate and instant
Click or tap to start
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Frequently Asked Questions
A reaction time test measures how quickly you respond to a stimulus. In our tool, you can test visual reaction (screen color change) or auditory reaction (sound beep). It's used in sports, gaming, and cognitive research.
Average visual reaction time is around 200â250 milliseconds. Auditory reactions are typically faster, around 150â200 ms. Factors like age, fatigue, and practice can influence your score.
Regular practice, staying hydrated, getting enough sleep, and reducing distractions can improve reaction speed. Physical exercise and cognitive training games also help.
The test uses highâresolution timestamps and Web Audio API for precise beep timing. However, device latency (screen, Bluetooth headphones) can add a few milliseconds. For best results, use wired accessories and a fast device.
Online Hearing Test â Frequency Pitch Perception
Play pure tones at various frequencies to estimate your hearing range. Simple and educational.
Online BPM Tapper - Tap to Find Beats Per Minute
Tap any key to the beat of a song and the tool calculates the BPM. Also shows average and millisecond delay for loops.
Decision Roulette - Online Spinning Wheel with Sound
A sound-enabled spinning wheel with your custom options. Exciting animation and result reveal. Local only.
Eye Dominance Test - Online Find Your Dominant Eye
Simple interactive eye dominance test: hold up a virtual dot and see which eye stays aligned. Educational.
Coding Interview Timer - Online LeetCode Practice Clock
Set a 20, 30, or 45âminute countdown to simulate a technical interview. Hidden/unhidden. Boost your prep.
Keyboard Layout Tester - Online Visual Key Press Viewer
Press any key and see it light up on a standard QWERTY layout. Check functionality or demonstrate shortcuts.
Touch Pressure & Radius Visualizer - Online Advanced Input
Touch your screen and see the pressure and radius reported. Visualize force. Mobile developer tool.
Screen Wake Lock Tester - Online Keep Screen On
Toggle a screen wake lock to prevent the device from dimming or sleeping. See the lock state and learn the API.
Wake Lock API Tester - Online Prevent Screen Sleep
Request and release a screen wake lock to keep the device awake. See the lock state in real time. Perfect for recipes or presentations.
Pronounceable Password Generator - Online Easy to Say
Create secure passwords that look like gibberish words but are easy to pronounce and remember. Mix of syllables. Local generation.
Pronounceable Random Password - Online Secure & Readable
Create a random long password that alternates consonants and vowels to mimic a pronounceable word. XKCD meets CVCV. Local.
Rhyme Finder - Online Dictionary of Rhyming Words
Enter a word and get a list of perfect and near rhymes. Categorized by syllable count. Useful for songwriting and poems. Static data, local.
Bcrypt Hash Generator - Online Password Hashing Tool
Generate a bcrypt hash from a password with configurable salt rounds. Verify a password against a hash. Entirely clientâside.
Upside Down Text Generator - Online Flip & Reverse Letters
Write upside down text using Unicode flipped characters. Copy and paste to surprise friends. Completely frontend and instant.
Password Strength Story - Online Visual Narrative
Evaluate password strength through a short interactive story where each character set adds lines to a narrative. Educational fun.
RaccoonâProof Trash Can Securing Guide â Online DIY
Select your bin type and get a custom instruction on securing it with bungees, straps, or locks.
Weak Password Dictionary Check - Online Top 10k List
Compare your password against a builtâin list of the 10,000 most common passwords. Instant warning if it appears.
Audio/Video Sync Tester - Online Lip Sync Check
Load a video and visually check if audio aligns with lips. Use frameâbyâframe stepping. Debug playback issues.
AcceptâLanguage Header Visualizer - Online Locale Match
Paste your AcceptâLanguage header and see which languages your site should serve based on quality values. Internationalization helper.
Push Notification Tester - Online Generate & Receive
Register a service worker, subscribe to push, and send a test notification using a VAPID key pair. Stepâbyâstep demo.
Geolocation API Simulator - Online Test Coordinates
Override your browser's geolocation to any coordinates and test how your app responds. For development and privacy testing.
Web Share API Tester - Online Demo & Code
Test the Web Share API by sharing text, links, and files directly from the browser. Check compatibility and see example code.
Browser Color Gamut Test - Online P3 or sRGB?
Check if your browser and display support the wider DCIâP3 color space. See the difference with a simple test pattern.
Palindrome Tester - Online Phrase Checker
Enter any phrase and instantly see if it's a palindrome, ignoring spaces and punctuation. Fun for word nerds.
Fake ID Number Generator - Online Test SSN/SIN Lookalike
Generate random, formatted ID numbers that match pattern rules for various countries. For testing input validation. No real data.
Timestamp to Relative Time - Online '5 minutes ago'
Convert a Unix timestamp or ISO date into a humanâfriendly relative string like '2 days ago'. See examples.
HTTP Request Composer - Online Build & Send Requests
Pick a method, URL, headers, and body, then send an HTTP request directly from your browser. Debug APIs easily.
Media Device Tester - Online Check Camera, Mic & Speaker
Quickly test if your webcam, microphone, and speakers work correctly. See live video and audio meter. No data sent.
Fuzzy Data Generator - Online Create Random Records
Generate random but realisticâlooking data arrays (users, products, orders) with typos and missing fields. For test robustness.