UD5 Toolkit
Analyser Node Playground - Online Real‑Time Frequency & Waveform
Connect an audio source to an Analyzer Node and display frequency and time‑domain data. Learn Web Audio visualization.
Web Audio Filter Chain - Online Biquad & Convolver
Web Audio Filter Chain
Biquad Filters + Convolution ReverbAudio Source
Drop audio file or click to browse
WAV, MP3, OGG, FLAC supported
No file loaded
Playback & Output
Frequency Response
Theoretical (Biquad)
Real-time Spectrum
Biquad Filter Chain (0 filters)
No filters yet. Click "Add Filter" to start shaping your sound.
Convolution Reverb
Small Room
Medium Hall
Large Hall
Cathedral
Spring
Live Sound Frequency Detector - Online Audio Analyzer
Use your microphone to detect the dominant frequency of ambient sounds. Visualize the spectrum. Local Web Audio.
OfflineAudioContext Demo - Online Render Audio Fast
Process audio faster than real‑time with OfflineAudioContext. Apply filters and export the result. Dev tool.
Audio Loudness Meter - Online LUFS & RMS Analyzer
Measure the integrated loudness of an audio file in LUFS and RMS. Check if your music meets streaming platform standards. Client‑side.
Monophonic Synth - Online Play with Oscillator & Envelope
Play a simple monophonic synthesizer with your keyboard. Choose waveform, attack, decay, and filter. For music fun.
Online Spectrogram Viewer - Audio Frequency Visualizer
Load an audio file and see its spectrogram with frequency over time. Adjust resolution and color map. Discover hidden sounds.
Ambient Focus Sound Mixer – Online Rain, Fire, Cafe, Waves
Mix multiple ambient sounds (rain, fireplace, coffee shop) to create your perfect productive background.
Audio Pitch Shifter - Online Change Key Without Speed
Shift the pitch of any audio clip by semitones without affecting playback speed. Perfect for music transposition. Local Web Audio.
Advanced Ambient Noise Mixer - Online Rain, Wind & Cafe
Mix white noise, pink noise, rain, thunder, wind, and cafe sounds. Individual volume, save presets. Relax or focus. All client‑side.
Lo‑Fi Music Player - Online Focus & Study Beats
Play a selection of local lo‑fi tracks (embedded). Simple UI with play/pause. No copyright issues. Stay focused.
Blood Pressure Log - Online Track & Chart Readings
Record daily systolic/diastolic readings and pulse. See a trend chart. All data saved locally in your browser.
Adaptive Bitrate Streaming Simulator - Online HLS/DASH Demo
Simulate adaptive bitrate logic by switching between different quality video segments. See how ABR algorithms work.
Pomodoro Timer with Lo‑Fi Music - Online Focus Beats
Pomodoro timer with built‑in lo‑fi music playlist (synthetic). Focus and rest cycles. No copyright music; generated tones.
Electromagnetic Spectrum Explorer - Online Wavelengths
Zoom through the electromagnetic spectrum from radio waves to gamma rays. See wavelength, frequency, and applications. Static educational page.
Periodic Background Sync Demo - Online PWA Feature
Register a periodic background sync to fetch fresh data even when the tab is closed. Understand the API and limits.
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.
Circuit Bending Simulator - Online Glitch Sound Generator
Create experimental glitch noises by toggling virtual circuit bend points. No real electronics harmed. Fun noise toy.
Fisheye Lens Effect - Online Apply Bulge or Pinch
Apply a fisheye or barrel distortion to your photo with adjustable strength. Simulate extreme wide angle.
WebGPU Compute Benchmark - Online GPU Performance Test
Measure your browser's GPU compute power using a simple WebGPU matrix multiplication. See raw FLOPS and compare with peers. Fully client‑side.
What Is My IP Address - Online IP Lookup & Info Tool
Find your public IP address and view approximate geolocation, ISP, and browser header details. No personal data stored. Static and instant.
Built-in AI API Playground - Online Test Chrome's Gemini Nano
Experiment with the experimental Prompt API and Summarization API right in your browser. See how the on‑device AI model responds. Requires Chrome with AI features enabled.
Retro Synth Pad - Online 8‑bit Sound Generator
Play a collection of retro 8‑bit synth pads and leads using your keyboard. Record sequences and export as WAV. Pure Web Audio API.
Vibration API Demo - Online Test Haptic Feedback
Trigger different vibration patterns on mobile devices. Test if your phone supports haptic feedback. Simple demo.
Ambient Pressure Sensor Demo - Online Barometer
Read the ambient atmospheric pressure in hPa using the Pressure Sensor API (if available). Real‑time graph.
API Request Builder - Online Test REST Endpoints
Select HTTP method, set headers, and body. Send requests and see the full response. Lightweight Postman alternative.
Little Planet Effect - Online Stereographic Photo Projection
Transform a panoramic photo into a tiny planet (stereographic projection). Drag to adjust orientation. Download.
Built-in Translation API Demo - Online On‑Device Translate
Test the experimental Translation API to translate text between languages directly in the browser, without cloud calls. Check support and copy the JavaScript starter.
Background Sync API Tester - Online Offline Queue
Register a one‑off background sync and see it fire when connectivity returns. Debug service worker sync logic.
Periodic Background Sync Tester - Online Register & Test
Register a periodic background sync and see the status. Schedule content updates for your PWA. API demo.
Magnetometer Demo - Online Digital Compass
Use the Magnetometer API to build a digital compass. See magnetic field strength and heading in real time.