OSHIStamp: YouTube Video Timestamp Creation & AI Summary Tool

This is a free tool that assists with creating timestamps for YouTube videos. With intuitive controls, you can easily create and edit timestamps, and for advanced users, quick tasks using keyboard shortcuts are also available. Additionally, with the AI summary and the per-video saved memo list, you can jump to the corresponding video with a single click, allowing smooth access to previously created timestamps. It helps make your fan activities more enjoyable and convenient. Please make use of it! ✅️Insert Timestamps 　Click the ⏱️ button while watching a video to insert the current time at the cursor position. ✅️Change Timestamp Format 　You can choose from the following two formats for the timestamps: 　- Short format (e.g., 2:30, 1:45:15) 　- Full format (e.g., 00:02:30, 01:45:15) 　※ When adjusting by ±1 second using shortcuts(CTRL + SHIFT/ALT + ↑↓), the selected format will be applied. ✅️Jump from Timestamps 　Clicking on a timestamp link will move the video to that time. ✅️Fast Forward / Rewind 　You can choose from preset durations (1s, 5s, 10s, 1min, 5min, 10min) using buttons. Shortcut keys (Ctrl + Shift / Alt + ←→) are also supported. One custom duration can be added as well. ✅️AI Summarization 　Leverage Google AI Studio (e.g. Gemini API) to semi‑automatically summarize the content of captioned videos. Limitations 　- Video length: under 12 hours 　- Caption file required 　- Breaks required for continuous use (due to Google AI Studio API rate limits) ✅️Video Screenshot 　You can download a screenshot of the video in "PNG format." ✅️Generate Timestamp Links 　Copy a link that starts playback from the current time to your clipboard with one click. ✅️Copy Timestamp 　Copy the created timestamp to the clipboard with one click. ✅️Video playback time and current time display with toggle 　You can view the video playback time in real time on the screen. Clicking the playback time switches the display to the current time. The displayed time may have slight discrepancies. ✅️Video-based Auto-Save Function 　Timestamps are automatically saved to local storage as they are created, so there's no worry about losing data during your work. Timestamps are saved independently for each video, allowing you to manage timestamps for multiple videos collectively. Additionally, you can jump to the corresponding video with a single click from the per-video saved memo list, allowing smooth access to previously created timestamps. ✅️Backup and Restore 　To ensure your data is carried over in the following scenarios, we provide a backup feature for timestamp data: 　- Reinstalling the extension 　- Reinstalling Chrome 　- Deleting the user profile (user data directory) 　- Reinstalling the OS or migrating to a different OS All timestamp data can be exported and imported in JSON format, enabling easy saving and restoration. Automatic backups to Google Drive are also supported. ✅️Display Fan Images 　Upload your favorite image to display on the screen, boosting motivation for your fan activities! 　(Supported size: 500px × 70px, formats: JPG, PNG, SVG) ✅️Minimize Feature 　Minimize the screen to the bottom right when not in use. - v2.43.0: ･Added a popup that displays a list of recent notes when the extension icon is clicked - v2.42.0: ･Added file selection by clicking the favorite image area and a link button to the image size optimization tool 🔏Privacy and Data Management: This tool does not collect any user data. All data is saved locally and managed securely. The developer is not responsible for any loss or damage caused by the use of this tool. Please use it at your own risk.