Small tools for specific jobs.

Practical English for Chinese speakers: work, AI conversations, interviews, and travel. Practice with audio, record yourself, and keep progress locally.

Explore family relationships, forms of address, and bilingual family diagrams across six languages.

Design printable paper, mixed layouts, handwriting sheets, music staves, and tear-off flyers locally in your browser.

Calculate dates, business days, holidays, and time-off plans across regional calendars.

Plan fabric cuts and estimate purchase length locally in your browser.

Plan screen-printing exposure tests and calculate corrections in your browser.

Batch rename files locally in your browser. Nothing is uploaded.

Explore what legitimate public sources reveal about a search.

Test cross-origin requests without running a proxy server.

Create, test, and manage local request rules across Chrome, Edge, and Firefox.

Compare files and folders locally in your browser.