Random Animal Soundboard - Online Hear Real Calls
Click buttons to play real animal sounds: lion roar, bird tweet, dolphin click. Studio recorded. No load.
UD5 Toolkit
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Click buttons to play real animal sounds: lion roar, bird tweet, dolphin click. Studio recorded. No load.
Virtual flip coins thousands of times and see the heads/tails ratio converge to 50%. Interactive law of large numbers.
Create a random, aspirational quarterly objective with unrealistic key results. For meeting icebreakers.
Play a metronome with adjustable BPM, time signature, and subdivisions (eighth, triplet, sixteenth). Tap tempo and visual flash. Works offline for practice.
Assign Secret Santa pairings from a list of names with spouse/partner exclusions. Optionally email results via mailto link. Fully local, no server.
Generate a realistic, random user‑agent string for desktop, mobile, or bot. Perfect for API testing and scraping.
Test your browser's built‑in speech recognition. Speak and see the transcribed text appear live. Must‑have for voice app devs.
Click for a warm, encouraging sentence to lift your spirits or support a friend. Small positive boost. No repeats.
Play left‑only, right‑only, and frequency sweeps to test your speakers or headphones. Quick audio check.
Tune your guitar using the browser microphone. Detects pitch and shows deviation from standard tuning. No installation, pure client-side audio processing.
Hear text spoken word by word with boundary events. See the exact index and character. Advanced TTS dev tool.
List all available TTS voices on your system. Test each with any text. Adjust rate and pitch. Find the best voice.
Compare :focus and :focus‑visible styling. See which one applies when using mouse vs. keyboard. Accessible focus management.
Paste your own text and generate a random sentence that mimics its style. Use for creative writing prompts or testing. Fully local.
Visualize audio in real time from your microphone or uploaded audio file. See the waveform dance. Uses Web Audio API locally.
Generate a Lit Element web component skeleton with styles and properties. Copy and start coding immediately.
Set your birth date and see a live countdown with days, hours, minutes, and seconds. Shareable link. Pure frontend.
Play an audio file or use mic to see real‑time frequency bars. Choose colors. Great for music videos. Canvas.
A precise online metronome with adjustable BPM, beat emphasis, and time signature. Works offline. Essential for musicians.
Create a custom element with named slots and see content projection in action. Learn Web Components basics.
Set any future date and see a live countdown in days, hours, minutes, seconds. Fun animated display. Save multiple countdowns locally.
Set a list of agenda items with allocated minutes. Advance through speakers and see remaining time visually. Keep meetings on track.
Paste your speech, set time limit, and practice with a pacing indicator (words per minute). Refine delivery.
Build a properly formatted robots.txt file with user-agent rules and sitemap location. Validate syntax in real time. Essential for webmasters.
Change the text input cursor color. See the effect live. Copy the minimal CSS. Simple but delightful.
Simple tracker to record potty attempts, successes, accidents. See patterns. Data stays local. Aids in toilet training journey.
Turn your browser screen into a full‑color flashlight or strobe. Adjust brightness and color. Simple utility.
Register a service worker, subscribe to push, and send a test notification using a VAPID key pair. Step‑by‑step demo.
Set watering schedules for multiple plants with visual alerts. Shows which plants need water today based on last watered date. Data stored locally.
Tap a glass icon each time you drink a cup of water. See your daily intake. Reminders optional. Local storage.