feat: add KittenTTS-FastAPI support and update documentation

README.md

@@ -18,7 +18,7 @@ OpenReader is an open source, self-host-friendly text-to-speech document reader
 
 ## ✨ Highlights
 
-- 🎯 **Multi-provider TTS** with OpenAI-compatible endpoints (OpenAI, DeepInfra, Kokoro, Orpheus, custom).
+- 🎯 **Multi-provider TTS** with OpenAI-compatible endpoints (OpenAI, DeepInfra, Kokoro, KittenTTS-FastAPI, Orpheus, custom).
 - 📖 **Read-along playback** for PDF/EPUB with sentence-aware narration.
 - ⏱️ **Word-by-word highlighting** via optional `whisper.cpp` timestamps.
 - 🛜 **Sync + library import** to bring docs across devices and from server-mounted folders.
@@ -38,6 +38,7 @@ OpenReader is an open source, self-host-friendly text-to-speech document reader
 | Configure object storage | [Object / Blob Storage](https://docs.openreader.richardr.dev/configure/object-blob-storage) |
 | Configure TTS providers | [TTS Providers](https://docs.openreader.richardr.dev/configure/tts-providers) |
 | Run Kokoro locally | [Kokoro-FastAPI](https://docs.openreader.richardr.dev/configure/tts-provider-guides/kokoro-fastapi) |
+| Run KittenTTS locally | [KittenTTS-FastAPI](https://docs.openreader.richardr.dev/configure/tts-provider-guides/kitten-tts-fastapi) |
 | Get support or contribute | [Support and Contributing](https://docs.openreader.richardr.dev/about/support-and-contributing) |
 
 ## 🧭 Community

docs-site/docs/configure/tts-provider-guides/custom-openai.md

@@ -6,6 +6,8 @@ Use any custom OpenAI-compatible TTS service with OpenReader.
 
 Use this integration when your endpoint is not directly covered by built-in dropdown defaults.
 
+Known compatible examples include Kokoro-FastAPI, KittenTTS-FastAPI, and Orpheus-FastAPI.
+
 ## Provider
 
 - Provider: `Custom OpenAI-Like`

docs-site/docs/configure/tts-provider-guides/kitten-tts-fastapi.md

@@ -0,0 +1,46 @@
+---
+title: KittenTTS-FastAPI
+---
+
+Use [KittenTTS-FastAPI](https://github.com/richardr1126/KittenTTS-FastAPI) as an OpenAI-compatible TTS backend for OpenReader.
+
+## Provider
+
+- Provider: `Custom OpenAI-Like`
+- Typical model: `kitten-tts`
+- `API_BASE`: required (usually your KittenTTS URL ending with `/v1`)
+- `API_KEY`: set only if your deployment requires one
+
+## Run KittenTTS (CPU)
+
+```bash
+docker run -it --rm \
+  --name kittentts-fastapi \
+  -e KITTEN_MODEL_REPO_ID="KittenML/kitten-tts-nano-0.8-fp32" \
+  -p 8005:8005 \
+  ghcr.io/richardr1126/kittentts-fastapi-cpu
+```
+
+## OpenReader setup
+
+1. Start your KittenTTS-FastAPI server.
+2. In OpenReader Settings, choose provider `Custom OpenAI-Like`.
+3. Set `API_BASE` to your KittenTTS base URL (typically ending with `/v1`).
+4. Set `API_KEY` only if your deployment requires one.
+5. Choose model `kitten-tts` (or another model exposed by your deployment).
+
+## Notes
+
+:::info OpenAI-compatible API
+OpenReader expects OpenAI-compatible audio endpoints when using KittenTTS through `Custom OpenAI-Like`.
+:::
+
+:::tip Endpoint shape
+Use an `API_BASE` that points at the KittenTTS API root (typically ending with `/v1`).
+:::
+
+## References
+
+- [richardr1126/KittenTTS-FastAPI](https://github.com/richardr1126/KittenTTS-FastAPI)
+- [TTS Providers](../tts-providers)
+- [TTS Environment Variables](../../reference/environment-variables#tts-provider-and-request-behavior)

docs-site/docs/configure/tts-providers.md

@@ -8,7 +8,7 @@ import TabItem from '@theme/TabItem';
 OpenReader supports OpenAI-compatible TTS providers through a common API shape.
 
 :::tip
-If you are running a self-hosted TTS server (Kokoro/Orpheus/etc.), use **Custom OpenAI-Like** in Settings.
+If you are running a self-hosted TTS server (Kokoro/KittenTTS/Orpheus/etc.), use **Custom OpenAI-Like** in Settings.
 :::
 
 ## Quick Setup by Provider
@@ -46,7 +46,7 @@ In Settings, provider options include:
 
 - `OpenAI`
 - `Deepinfra`
-- `Custom OpenAI-Like` (Kokoro, Orpheus, and other OpenAI-compatible endpoints)
+- `Custom OpenAI-Like` (Kokoro, KittenTTS-FastAPI, Orpheus, and other OpenAI-compatible endpoints)
 
 `API_BASE` guidance:
 
@@ -67,6 +67,7 @@ TTS requests are sent from the Next.js server, not directly from the browser. `A
 ## Provider Guides
 
 - [Kokoro-FastAPI](./tts-provider-guides/kokoro-fastapi)
+- [KittenTTS-FastAPI](./tts-provider-guides/kitten-tts-fastapi)
 - [Orpheus-FastAPI](./tts-provider-guides/orpheus-fastapi)
 - [DeepInfra](./tts-provider-guides/deepinfra)
 - [OpenAI](./tts-provider-guides/openai)

docs-site/docs/docker-quick-start.md

@@ -8,7 +8,7 @@ import TabItem from '@theme/TabItem';
 ## Prerequisites
 
 - A recent Docker version installed
-- A TTS API server that OpenReader can reach (Kokoro-FastAPI, Orpheus-FastAPI, DeepInfra, OpenAI, or equivalent)
+- A TTS API server that OpenReader can reach (Kokoro-FastAPI, KittenTTS-FastAPI, Orpheus-FastAPI, DeepInfra, OpenAI, or equivalent)
 
 :::note
 If you have suitable hardware, you can run Kokoro locally with Docker. See [Kokoro-FastAPI](./configure/tts-provider-guides/kokoro-fastapi).

docs-site/docs/introduction.md

@@ -8,12 +8,13 @@ OpenReader is an open source text-to-speech document reader built with Next.js.
 
 > Previously named **OpenReader-WebUI**.
 
-It supports multiple TTS providers including OpenAI, DeepInfra, and custom OpenAI-compatible endpoints such as [Kokoro-FastAPI](https://github.com/remsky/Kokoro-FastAPI) and [Orpheus-FastAPI](https://github.com/Lex-au/Orpheus-FastAPI).
+It supports multiple TTS providers including OpenAI, DeepInfra, and custom OpenAI-compatible endpoints such as [Kokoro-FastAPI](https://github.com/remsky/Kokoro-FastAPI), [KittenTTS-FastAPI](https://github.com/richardr1126/KittenTTS-FastAPI), and [Orpheus-FastAPI](https://github.com/Lex-au/Orpheus-FastAPI).
 
 ## ✨ Highlights
 
 - 🎯 **Multi-Provider TTS Support**
   - [**Kokoro-FastAPI**](https://github.com/remsky/Kokoro-FastAPI): supports multi-voice combinations (for example `af_heart+af_bella`)
+  - [**KittenTTS-FastAPI**](https://github.com/richardr1126/KittenTTS-FastAPI): lightweight, CPU-friendly self-hosted TTS
   - [**Orpheus-FastAPI**](https://github.com/Lex-au/Orpheus-FastAPI)
   - **Custom OpenAI-compatible**: any TTS API with `/v1/audio/voices` and `/v1/audio/speech` endpoints
   - **Cloud TTS providers**:

docs-site/sidebars.ts

@@ -21,6 +21,7 @@ const sidebars: SidebarsConfig = {
           },
           items: [
             'configure/tts-provider-guides/kokoro-fastapi',
+            'configure/tts-provider-guides/kitten-tts-fastapi',
             'configure/tts-provider-guides/orpheus-fastapi',
             'configure/tts-provider-guides/deepinfra',
             'configure/tts-provider-guides/openai',

src/app/(public)/page.tsx

@@ -6,7 +6,7 @@ export const metadata: Metadata = {
   description:
     'OpenReader lets you upload EPUB, PDF, TXT, MD, and DOCX files for synchronized text-to-speech reading with multi-provider TTS support.',
   keywords:
-    'PDF reader, EPUB reader, text to speech, tts open ai, kokoro tts, OpenReader, TTS PDF reader, ebook reader, epub tts, document reader',
+    'PDF reader, EPUB reader, text to speech, tts open ai, kokoro tts, kitten tts, OpenReader, TTS PDF reader, ebook reader, epub tts, document reader',
   alternates: {
     canonical: '/',
   },
@@ -388,7 +388,7 @@ export default function LandingPage() {
               OpenReader highlights every word as it’s spoken, turning
               any document into a synchronized read-along experience. Connect
               any OpenAI-compatible TTS provider — including Kokoro,
-              Deepinfra, or your own self-hosted endpoint.
+              KittenTTS, Deepinfra, or your own self-hosted endpoint.
             </p>
           </div>
           <ul className="landing-tts-list">
@@ -403,7 +403,7 @@ export default function LandingPage() {
               <span className="landing-tts-list-icon" aria-hidden="true">&bull;</span>
               <div>
                 <h4>Multiple voices &amp; providers</h4>
-                <p>Choose from dozens of voices across OpenAI, Kokoro, Deepinfra, or any compatible endpoint.</p>
+                <p>Choose from dozens of voices across OpenAI, Kokoro, KittenTTS, Deepinfra, or any compatible endpoint.</p>
               </div>
             </li>
             <li>

src/components/SettingsModal.tsx

@@ -105,6 +105,7 @@ export function SettingsModal({ className = '' }: { className?: string }) {
       case 'custom-openai':
         return [
           { id: 'kokoro', name: 'Kokoro' },
+          { id: 'kitten-tts', name: 'KittenTTS' },
           { id: 'orpheus', name: 'Orpheus' },
           { id: 'custom', name: 'Other' }
         ];