EchoWords · Chrome 扩展程序

隐私政策

更新日期：2026 年 10 月 23 日

EchoWords 帮你保存从网页、当前可见的 YouTube 字幕及 PDF 中主动选取的词语。单词本首先保存在你当前 Chrome 配置文件的本地数据库中。

保存在设备上的数据

EchoWords 保存单词及修改、附近文章文本或可见字幕、来源标题与网址、采集时间、YouTube 视频 ID 与时间戳，以及词条翻译。复习日期、间隔和次数也保存在本地 IndexedDB。中文目标语言偏好、同步设备标识以及上次授权的 Google 账号标识保存在此 Chrome 配置文件的 localStorage 中。

Google Drive 手动同步

只有当你点击“推送本地到云端”时，EchoWords 才会将当前设备的完整单词本上传到你授权的 Google Drive 隐藏应用数据目录。上传内容包括词语、来源网址与摘录、采集记录、翻译、复习记录和删除标记。点击“从云端更新本地”时，EchoWords 才会从该目录下载快照并合并到本地。采集词语不会自动上传。

同步使用 Google 授权，不需要注册 EchoWords 账号。EchoWords 通过 Google Drive API 读取授权账号的邮箱地址与账号标识，以显示并确认同步目标；本地仅保存账号标识，以便下次账号改变时提醒你。云端快照位于 Google Drive 的 appDataFolder，不会显示在普通的“我的云端硬盘”文件列表中。云端文件按设备分别保存，不会因为一次本地更新而自动删除。

EchoWords 不会将单词本发送给开发者服务器、分析或广告服务。对 Google API 数据的使用仅限于本政策描述的同步功能，并遵守 Google API 服务用户数据政策的 Limited Use 要求。

翻译、导入与导出

选择中文目标语言后，EchoWords 使用 Chrome 内置的 Translator API，在设备上翻译已保存的英文词和中文词条；不会向远程 AI 服务请求翻译。Chrome 可能下载所需的语言包。只有你主动选择导出时才会生成 JSON 文件；“导出到 iPhone”只包含词语及对应翻译，“导出 JSON”包含完整备份记录。导出操作不会上传文件。导入备份只读取你选择的文件并合并到本地数据库，不会自动上传。

浏览器权限

• activeTab 与 scripting：在你触发快捷键后读取普通网页上明确选中的文本。
• https://www.youtube.com/*：读取当前显示在屏幕上的字幕，并保持视频原有播放状态。
• contextMenus：提供由你触发的 PDF 选词菜单。
• offscreen：在词库页面关闭时读取已保存的语言偏好，运行设备端翻译。
• identity 与 https://www.googleapis.com/*：在你点击同步按钮后请求 Google 授权并访问 Drive 应用数据。

EchoWords 不监控剪贴板，不自动采集整个网页，也不下载完整 YouTube 字幕稿。

保留与删除

本地数据会保留到你删除词条、清除扩展程序数据、移除扩展程序或删除 Chrome 配置文件。删除词条会生成删除标记，使以后从云端更新的其他设备也能识别该删除。Google Drive 快照保留在你的账号中，直到你移除相应的应用数据；清空本地词库后再推送只会更新快照的逻辑内容，不会删除云端文件。你可以随时使用“导出 JSON”制作本地备份。

联系我们与政策更新

有关隐私或同步的问题，请联系 acboo2020@gmail.com。若数据使用方式改变，我们会在相关功能发布前更新本政策。

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EchoWords · Chrome extension

Privacy Policy

Updated October 23, 2026

EchoWords saves words you explicitly select from web pages, currently visible YouTube captions, and PDFs. Your notebook is stored first in the local database of your current Chrome profile.

Data stored on your device

EchoWords stores words and your edits, nearby article text or visible caption context, source titles and URLs, capture times, YouTube video IDs and timestamps, and translations. Review dates, intervals, and counts are stored in local IndexedDB. Your Chinese target-language preference, sync device ID, and the identifier of the last authorized Google account are stored in this Chrome profile’s localStorage.

Manual Google Drive sync

Only when you select “Push local to cloud” does EchoWords upload this device’s full notebook to the hidden app data folder of the Google Drive account you authorized. This includes words, source URLs and excerpts, capture records, translations, review records, and deletion markers. Only when you select “Update local from cloud” does EchoWords download snapshots from that folder and merge them locally. Capturing a word does not start an upload.

Sync uses Google authorization; no EchoWords account is required. EchoWords reads the authorized account’s email address and identifier through the Google Drive API to show and confirm the sync destination. It stores only the account identifier locally so it can warn you when the account changes. Cloud snapshots reside in Google Drive’s appDataFolder and do not appear in the normal My Drive file list. Snapshots are kept separately for each device and are not automatically deleted by a local update.

EchoWords does not send your notebook to a developer server, analytics provider, or advertiser. Its use of Google API data is limited to the sync feature described here and follows the Google API Services User Data Policy, including its Limited Use requirements.

Translation, import, and export

After you choose a Chinese target language, EchoWords uses Chrome’s built-in Translator API to translate saved English and Chinese words on your device; it does not request translation from a remote AI service. Chrome may download required language packs. A JSON file is created only when you choose an export action: “Export for iPhone” contains words and their translations, while “Export JSON” contains full backup records. Export does not upload a file. Import reads only the backup you select and merges valid records locally; it does not upload automatically.

Chrome permissions

• activeTab and scripting read text you explicitly select on an ordinary page after you invoke the shortcut.
• https://www.youtube.com/* reads only captions currently rendered on screen and preserves playback state.
• contextMenus provides the user-triggered PDF selection action.
• offscreen reads your saved language preference and runs on-device translation when the notebook page is closed.
• identity and https://www.googleapis.com/* request Google consent and access Drive app data after you click a sync button.

EchoWords does not monitor your clipboard, automatically collect whole pages, or download complete YouTube transcripts.

Retention and deletion

Local data remains until you delete words, clear extension data, remove the extension, or delete your Chrome profile. Deleting a word creates a deletion marker so other devices can recognize the deletion on a later cloud update. Drive snapshots remain in your Google account until you remove the associated app data; clearing the local notebook and pushing updates their logical contents but does not remove the cloud files. You can create a local backup with “Export JSON.”

Contact and changes

For privacy or sync questions, contact acboo2020@gmail.com. Changes in data use will be documented here before the related feature is released.

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