Convolution Reverb Demo - Online Impulse Response Player
Apply realistic reverbs (cathedral, hall, room) to any audio using pre‑loaded impulse responses. Hear the difference instantly.
UD5 Toolkit
Professional 10-band audio EQ with real-time frequency adjustment. Boost bass, tweak treble, and apply presets directly in your browser.
Presets
Apply realistic reverbs (cathedral, hall, room) to any audio using pre‑loaded impulse responses. Hear the difference instantly.
Interactive piano showing typical vocal ranges from Bass to Soprano. Highlight your range. For choir members.
Analyze a monophonic audio recording and convert the pitch into a MIDI file. Perfect for capturing musical ideas. Client-side.
Calculate ideal stereo speaker placement (toe-in, distance from wall) for best soundstage. Visual diagram. For audiophiles. Local tool.
Adjust cocktail ingredient quantities based on desired total volume or number of servings. Preserve classic ratios. Perfect for home bartenders.
Select a desired emotional state (calm, energize) and get a suggested song structure with BPM range.
Get the exact RGB inversion (negative) of any color. Useful for dark mode theming and high‑contrast accessibility checks.
Enter text and see a rough transliteration into Tolkien's Tengwar script. For fans of LOTR. Artistic rendering.
Upload an audio clip and generate an animated GIF of its waveform dancing. Shareable sound snippet. Canvas magic.
Calculate new dimensions while preserving aspect ratio, or find the ratio from width and height. For video and images.
Apply a blur effect to image background while keeping the subject sharp. Simple brush selection for area to keep sharp. CSS+Canvas implementation, local only.
Enter an unbalanced chemical equation and get the balanced coefficients instantly. Supports parentheses and ions. All local JavaScript algebra.
Browse the built‑in styles that browsers apply to HTML elements. Understand why your page looks different. Static reference.
Select functional groups to see an approximate IR absorption spectrum. Learn spectroscopy visually. All local.
Animated circle guides your breathing: breathe in, hold, breathe out. Customizable ratios (e.g., 4-7-8). Soothing colors, optional bell sound. Purely local.
Click a note on the staff and see a visual diagram of the flute keys to press. Supports common alternate fingerings.
Enter hop additions with time and alpha acid to estimate International Bitterness Units. Adjust recipe.
Build a proper <meta name='viewport'> tag with width, initial‑scale, and user‑scalable options. Avoid common mobile rendering issues.
Type any word and generate a fake audio waveform GIF that looks like the word was spoken. Creative social posts. Canvas.
Enter a word and get a list of perfect and near rhymes. Categorized by syllable count. Useful for songwriting and poems. Static data, local.
Click colors on an interactive wheel and see the common emotions and meanings associated with them. A design resource.
Calculate water volume for rectangular, bow-front, and cylindrical tanks. Also computes weight of water. Supports inches/cm. Useful for dosing treatments.
Calculate the correct series resistor for an LED based on supply voltage, LED forward voltage, and desired current. Circuit diagram shown. Local only.
Arrange virtual fabric squares or triangles on a grid to preview a quilt pattern. Change colors and sizes. Export layout.
Place multiple grid items into the same cells to create overlapping layouts. Learn the technique visually. Copy code.
Calculate corrected (adjusted) age for premature infants based on birth date and due date. Important for developmental milestone tracking. Local only.
A random note appears on the grand staff; click the correct piano key. Improve sheet music reading. Multiple clefs.
View a series of digital Ishihara‑style plates. Not a diagnostic tool, just educational. Read numbers.
Calculate alcohol by volume from original and final gravity readings. Also estimate attenuation and calories.
Build a complete Nginx location block for reverse proxy, static files, or redirect. Copy the snippet. Quick config help.