Karo Software

Turn ChatGPT assistant responses into vertical writing (tategaki). Designed for a calm reading experience.

Smart Enter key for ChatGPT and Gemini. Prevents accidental Enter sends and scrolls when the prompt is empty.

YouTube Simple Speeder. One-click speed control up to 10x, plus a handy 5-second rewind button.

A vertical writing practice notebook for ChatGPT.

Adds verify and summary support on YouTube watch pages and feed cards, then opens Gemini in a separate window.

Bookmark useful Gemini question-and-answer pairs and jump back to them later.

Hide earlier chat and keep only the latest conversation visible. Designed for long chats and coding workflows.

Adjusts UI density and font settings for ChatGPT and Gemini.

AI chat length indicator for ChatGPT.

Take quick memos while watching YouTube. Lightweight, simple, and focused.

Bookmark useful ChatGPT question-and-answer pairs and jump back to them later.

Adds a simple checkbox to each ChatGPT sidebar chat so you can mark conversations for later.

A compact all-in-one YouTube panel for status, speed control, memo, and Gemini summary support.

Small but effective UX improvements for ChatGPT.

Add current tabs to a list, clean them up later, and reopen only what you want.