Fortissimo — a notepad that knows how hard you typed

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Every glyph is sized by the violence of its keystroke. With the mic on, the page peak-meters the thump of your keyboard in the ~100 ms around each key event (the audio is reduced to a loudness number on-device and discarded — nothing is recorded or sent anywhere). On a phone, the accelerometer feels the jolt of your taps instead. With neither, it falls back on typing rhythm and how long you hold each key. It self-calibrates as you go: type evenly and everything settles mid-size — the outliers are the point. Notes stay in this browser (localStorage). Sibling of Pen, which draws what you meant, not what your mouse did, Sign, which signs a PDF that never leaves your browser, Sheaf, which staples anything you drop into a single PDF, Unheic, which turns .heic photos into JPEGs that open anywhere, After Me, the patient singing examiner, and Glide, which lets you handwrite in the air — all at tools.j11y.io.