PitchShifter EN
rive · Firefox
Change pitch without changing speed, adjust speed without changing pitch, and add customizable reverb to browser media. Per-tab controls work with YouTube, Spotify Web and more. No account, tracking or data collection.
<all_urls>），意味着它可以读取你在任意站点的页面内容，包括已登录的页面。这是许多扩展正常工作的必要条件，但也值得你确认来源可信。
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简介
PitchShifter changes the musical pitch of video and audio playing in your browser in real time without changing playback speed. It can also change speed while preserving the configured pitch and add adjustable stereo room reverb.
Great for musicians transposing songs, singers and karaoke, language learners slowing down speech, or anyone who wants to experiment with sound in a different key or space.
Private by design
- No account or sign-in required.
- No analytics, tracking or ads.
- No personal, audio or browsing data is collected or uploaded.
- Audio processing happens locally in your browser.
- Settings are stored only on your own device.
Independent per-tab control
- Every new or reloaded tab starts with PitchShifter switched off.
- Moving a control enables it only for the current tab.
- The On/Off button restores the page's native speed and pitch-preservation settings when disabled.
- Saved values remain available as presets without being forced onto other tabs or sites.
Plug and play
- Click the toolbar icon and move a slider. No setup required.
- Works with supported browser media on YouTube, Spotify Web and many other sites.
- Compatible with pages using strict Content Security Policies and players using detached media elements.
- AudioWorklet processing keeps the audio engine separate from page and DOM work.
- At neutral settings, processing is bypassed with zero added latency.
Controls
- Pitch: −12 to +12 semitones.
- Microtones: fine-tune pitch between semitones.
- Speed: 25% to 200%, while keeping pitch intact.
- Reverb: 0% to 100% dry/wet mix in its own tab.
- Reverb modes: Simple for one-slider control, or Advanced with room size, decay, tone and pre-delay.
- On/Off: enable or disable processing for the current tab.
- Reset: instantly restore the default control values.
Version 1.1.0 uses SoundTouchJS AudioWorklets with adaptive WSOLA processing for normal and moderate slowdowns, plus a phase vocoder for smoother extreme slowdowns.
If you enjoy PitchShifter and would like to support the project, you can buy me a coffee:
PitchShifter 是做什么的
PitchShifter 是一款面向 Firefox 的隐私与安全类扩展，主要用来拦截追踪器、屏蔽广告、管理 Cookie、加固浏览器指纹。官方对它的介绍是：Change pitch without changing speed, adjust speed without changing pitch, and add customizable reverb to browser media. Per-tab controls work with YouTube, Spotify Web and more. No account, tracking or data collection.在Firefox 附加组件商店（AMO）上，它当前版本 1.1.4，评分 5（8 人评价），约 983 名用户。
适合什么人用
从功能定位看，PitchShifter 更适合在意上网被跟踪、希望减少广告干扰的用户。如果你平时只是偶尔遇到相关需求，用浏览器自带功能也能凑合；但如果这件事每天都发生，装一个专门处理它的扩展通常比手动操作省事得多。需要注意的是它作用于所有网站，装上后建议先观察一两天，确认不影响常用站点的正常使用。
怎么安装 PitchShifter
- 打开Firefox 附加组件商店（AMO）上的官方页面；
- 点「添加到浏览器」并确认权限提示；
- 装好后在扩展列表里固定图标，方便随时开关。
本站只做索引与介绍，安装包来自官方商店。如果商店页面提示当前地区不可用，说明该扩展未在你所在区域上架。
常见问题
PitchShifter 是免费的吗？
PitchShifter 在Firefox 附加组件商店（AMO）免费提供下载。它是浏览器扩展，装上就能直接用，不需要注册账号。
PitchShifter 安全吗？
它只申请了 0 项权限，范围比较克制，没有申请「读取所有网站数据」这种大权限。
PitchShifter 支持哪些浏览器？
当前收录的版本来自Firefox 附加组件商店（AMO），适用于 Firefox。同一个扩展在其他商店可能有对应版本，但功能与版本号不一定相同。
怎么卸载 PitchShifter？
在扩展管理页找到 PitchShifter，点移除即可。它在本地保存的设置会一起清掉，不会残留数据。
权限清单 来自 manifest.json 原文
站点访问 1
<all_urls>
接口权限 1
storage