Analyser Node Playground - Online RealβTime Frequency & Waveform
Connect an audio source to an Analyzer Node and display frequency and timeβdomain data. Learn Web Audio visualization.
UD5 Toolkit
Drop audio file or click to browse
WAV, MP3, OGG, FLAC supported
Connect an audio source to an Analyzer Node and display frequency and timeβdomain data. Learn Web Audio visualization.
Play a sweep from 20Hz to 20kHz. Test your speakers and your hearing. Simple and effective. Web Audio API.
Process audio faster than realβtime with OfflineAudioContext. Apply filters and export the result. Dev tool.
Load an audio file and see its spectrogram with frequency over time. Adjust resolution and color map. Discover hidden sounds.
Choose a base color and see its complementary, splitβcomplementary, triadic, and tetradic harmonies. Copy palettes. Local.
Interactive piano showing typical vocal ranges from Bass to Soprano. Highlight your range. For choir members.
Route your microphone input through a chain of virtual effects (distortion, reverb, delay) using Web Audio API.
Pick a method, URL, headers, and body, then send an HTTP request directly from your browser. Debug APIs easily.
Paste text to see a live letter frequency bar chart. Helps break substitution ciphers. All local analysis.
Drop an audio file and instantly see its duration in seconds and formatted time. Read metadata without full playback.
Select color bands to decode a resistor's value, tolerance, and temperature coefficient. Essential for anyone working with electronics hardware.
Play a selection of local loβfi tracks (embedded). Simple UI with play/pause. No copyright issues. Stay focused.
Pomodoro timer with builtβin loβfi music playlist (synthetic). Focus and rest cycles. No copyright music; generated tones.
Mix white noise, pink noise, rain, thunder, wind, and cafe sounds. Individual volume, save presets. Relax or focus. All clientβside.
Mix multiple ambient sounds (rain, fireplace, cafe, forest) at different volumes. Create your perfect background noise. Local loops.
Play a simple monophonic synthesizer with your keyboard. Choose waveform, attack, decay, and filter. For music fun.
Enter text and generate the corresponding Morse code audio beeps. Adjust speed and tone. Great for learning and practicing CW. No download.
Zoom through the electromagnetic spectrum from radio waves to gamma rays. See wavelength, frequency, and applications. Static educational page.
Create experimental glitch noises by toggling virtual circuit bend points. No real electronics harmed. Fun noise toy.
Write a pattern and test it against URLs instantly. See which groups match. Learn the modern alternative to regex for routing. Works entirely in the browser.
Hear a common bird song and choose the correct species from multiple choices. Ear training for birders.
Register a periodic background sync to fetch fresh data even when the tab is closed. Understand the API and limits.
Select HTTP method, set headers, and body. Send requests and see the full response. Lightweight Postman alternative.
Register a periodic background sync with a minimum interval. See the registration state and tags. Keep content fresh.
Trigger different vibration patterns on mobile devices. Test if your phone supports haptic feedback. Simple demo.
Read the ambient atmospheric pressure in hPa using the Pressure Sensor API (if available). Realβtime graph.
Play a collection of retro 8βbit synth pads and leads using your keyboard. Record sequences and export as WAV. Pure Web Audio API.
Experiment with the experimental Prompt API and Summarization API right in your browser. See how the onβdevice AI model responds. Requires Chrome with AI features enabled.
Complete a series of visual pattern puzzles and get a fun estimated score. Purely for entertainment. No data collected.
Use the Magnetometer API to build a digital compass. See magnetic field strength and heading in real time.