[ YouTube Subtitle Injector ] This extension allows you to upload, browse, and view custom subtitles on any YouTube video. Whether…

Latest Version

Version
0.1
Update
April 30, 2025
Size
116KiB
Developer
Category
Users
0
Rating
1 ★
Manifest Version
3
Web Store Status
Languages Support
English (United States)
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Permissions
Identity
Storage
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YouTube Subtitle Injector Extension

[ YouTube Subtitle Injector ]

This extension allows you to upload, browse, and view custom subtitles on any YouTube video. Whether you're sharing translations, improving accessibility, or adding fan captions, this extension gives you full control of subtitle playback.

📂 Upload your own .vtt or .srt subtitle files
🌍 Choose from community-contributed subtitles
💬 Toggle between native or custom-rendered subtitles
🔐 Secure login with your Google account
🎯 Fully integrated with YouTube UI

Perfect for language learners, fan translators, educators, and creators who want better subtitle control.

這款字幕工具讓你在任何 YouTube 影片上,瀏覽、觀看並上傳自訂字幕。不論是翻譯、輔助學習,還是創作同好字幕,這款擴充功能都能讓你輕鬆掌控字幕播放。

📂 上傳 .vtt 或 .srt 字幕檔案
🌍 選擇社群提供的字幕版本
💬 支援原生字幕或自訂樣式切換
🔐 使用 Google 帳號安全登入
🎯 完整整合至 YouTube 原生操作介面

適合語言學習者、字幕創作者、教育者,以及所有想更自由控制字幕的使用者。

Made with love by Harlos.
Fully open-source here: https://github.com/harlos0517/ytsub
Feel free to give suggestions or contact me regarding to this project.
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Source Manifest.json

{"update_url": "https://clients2.google.com/service/update2/crx", "manifest_version": 3, "name": "YouTube Subtitle Injector", "version": "0.1", "permissions": ["identity", "storage"], "host_permissions": ["https://www.youtube.com/*"], "background": { "service_worker": "background.js" }, "content_scripts": [ { "matches": ["https://www.youtube.com/*"], "js": ["content.js"], "css": ["content.css"] } ], "oauth2": { "client_id": "660529147192-u6o8u5sfh7k1defm2rnq1gio5jhsrjm5.apps.googleusercontent.com", "scopes": ["profile", "email", "openid"] }, "action": { "default_title": "YouTube Subtitle Injector" }, "web_accessible_resources": [ { "resources": ["subtitle.vtt"], "matches": [""] } ]}
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How to download and manually install YouTube Subtitle Injector extension for Chrome

Looking for a way to install YouTube Subtitle Injector extensions for Chrome, you can search for them in the Chrome Web Store, clicking the "Add to Chrome" button, and following the straightforward process.

However, you may need to install YouTube Subtitle Injector extensions manually, this article outlines two simple methods to effortlessly install YouTube Subtitle Injector extensions, whether they come as unpacked folders in compressed formats like .zip or as .crx files.

Method 1: Download YouTube Subtitle Injector extension and manually install through Drag &Drop

If you ever need to manually install a YouTube Subtitle Injector extension for Chrome, don't worry, it's a simple process. Just follow these easy steps, and you will have your extension ready to use in no time.

Step 1: Download the YouTube Subtitle Injector Extension by clicking the "Download CRX" button on the website.

Look for the YouTube Subtitle Injector extension you wish to install. Go to the website and download the YouTube Subtitle Injector extension package, which is usually a .CRX file and comes in a zipped file. Here ".crx" file is the format for YouTube Subtitle Injector extension that contains all the data.

Step 2: Extract &Arrange Files

Once the file is downloaded, extract that file into its own folder. Similarly, give that extension files a permanent home. In other words, keep it in a folder that you don't accidentally delete it because these files will be needed to make that extension work.

Step 3: Go to the Chrome Extensions Page

Open Google Chrome and in the address bar, type chrome://extensions; it will open the Google Chrome extensions page. Make sure that "My extensions" is selected in the sidebar.

Step 4: Drag and Drop the Extension

Now, go to the folder where you extracted the YouTube Subtitle Injector extension and drag &drop the extension file from there anywhere onto the extension page within Google Chrome.

Step 5: Complete the Installation

Once you drag and drop the extension file, follow the steps that Google Chrome takes you through. Similarly, if the extension file is of .crx file format, you will be required to review the permissions and then add the extension.

Now, you can manage that added extension as you would like to with any other Chrome extension that you added through Chrome Webstore. Its icon will also appear in the Google Chrome Menu on the right side of the address bar once you activate it.

Method 2: Download YouTube Subtitle Injector extension for Chrome and install in Developer Mode

This is another method to install YouTube Subtitle Injector extension manually, but the twist is that here, you install by enabling the developer mode option provided in Google Chrome. This mode is commonly used for testing extensions or running unpublished tools.

Step 1: Download the YouTube Subtitle Injector extension file

Select and download the YouTube Subtitle Injector extension by clicking the 'Download CRX' button on the website.

Step 2: Extract the downloaded contents

Convert the file to a ZIP file if it is in CRX format then extract the YouTube Subtitle Injector extension zip file or folder that you downloaded. Make sure you extract it using the same folder name and keep it safely in another folder, so you don't delete it by mistake. The extracted folder will be needed to keep your YouTube Subtitle Injector extension running.

Step 3: Open Chrome Extension Setting Page

In the address bar of Google Chrome, type chrome://extensions and open the Chrome Extension Page.

Step 4: Enable Developer Mode

After opening the Chrome Extension page, look at the top right side, and you will find the toggle option of "Developer mode."Simply enable that developer mode option.

Step 5: Load the Unpacked Extension

Once you enable the developer mode option, you will see the menu of Load Unpacked, Pack Extensions and Update. From that, select the option "Load unpacked."

Step 6: Select the Extension Folder

Once the pop-up opens upon clicking Load unpacked, select the YouTube Subtitle Injector extension directory and click on the "Select Folder "button.

Step 7: Confirm and Install

After you select an extension folder of a Google Chrome extension you're installing manually, confirm its installation for the final time and let the installation complete.

Conclusion

Here we've made a step-by-step guide on How to manually install YouTube Subtitle Injector extension in 2 ways. We hope this guide proves helpful.

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