Tools

Flashcards, sound generation, color filter tuning, and CSV plotting

Back to home
Sound & frequency generator

Create white noise, brown noise, and clean study tones directly in the browser with master mute control and smooth fades.

Use the Focus section for masking noise and the Study Frequencies section for a pure sine wave or a gentle alpha pulse around 10 Hz.

Open sound generator
Flashcards

Create a titled flashcard deck, save it locally in the browser, and study front-to-back, back-to-front, or with a random prompt side for language learning.

Use one deck in both directions and flip the shown side randomly when you want mixed recall.

Open flashcards
Image color filter tuner

Drop one or multiple images and tune min/max channels in HLS.

Drag and drop image files here

PNG, JPG, JPEG, WEBP, BMP, GIF and more

Sampling + auto-fit (HLS)

Picker tuple: [0, 255, 0]

Positives: 0 • Negatives: 0

Lower: [0, 0, 0]

Upper: [179, 255, 255]

White preset uses HLS bounds with (120, 200, 255) as key limits.

H 0–179
Min 0
Max 179
L 0–255
Min 0
Max 255
S 0–255
Min 0
Max 255

Live previews

No images loaded yet.
CSV plotter

Drop a CSV, select one X axis and one or more Y axes, then add plots.

Drag and drop CSV file here

First row is treated as header

ende