👋

Hi, I'm Yuya.

I'm a software engineer who enjoys building useful things and exploring new ideas.

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A few things an AI Agent made

Worried about AI slop? Check the site health.

kakusu Hide faces in photos, right in your browser.
Karuku Compress JPEG photos while preserving HDR.
koe Dictation for your Mac, wherever you type.
X Card Tools A guide and shortcut to X's Card Validator.