Ryota Kimura

Web dev & indie maker · Building with AI

About

Solo developer in Japan. 18 years of web work, mostly client projects. I build small apps with AI as my pair programmer: 5 released, 1 in progress. Maker of Diff Pro Max, a file compare app for projects that don't use Git. I write about building and selling my own products at rkpg.net.

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Tastemaker

Gone streaking

Maker History

Diff Pro Max - File CompareFile diff for people who don't use Git, fully offline
Sep 2026

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Joined Product HuntFebruary 19th, 2026

Forums

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13h ago

Diff Pro Max - File Compare - File diff for people who don't use Git, fully offline

For projects that don't use Git. Mac and Windows. Everything runs on your device: no account, no telemetry. · Text and code diff (always free) · Folder, image, audio and video diff · PDF / Word / PowerPoint diff, with OCR for scanned PDFs · Excel diff at the cell level · Snapshots: save file versions and compare them later · Delivery mode: export only changed files with the folder structure, plus a list of exported files Free: text unlimited, other modes 3x/day. Pro is a one-time purchase.