📄🔊 OpenReader WebUI

OpenReader WebUI is an open source text to speech document reader web app built using Next.js, offering a TTS read along experience with narration for EPUB, PDF, TXT, MD, and DOCX documents. It supports multiple TTS providers including OpenAI, Deepinfra, and custom OpenAI-compatible endpoints like Kokoro-FastAPI and Orpheus-FastAPI

• 🎯 Multi-Provider TTS Support
  • Kokoro-FastAPI: Supporting multi-voice combinations (like af_heart+af_bella)
  • Orpheus-FastAPI
  • Custom OpenAI-compatible: Any TTS API with /v1/audio/voices and /v1/audio/speech endpoints
  • Cloud TTS Providers (requiring API keys)
    • Deepinfra: Kokoro-82M + models with support for cloned voices and more
    • OpenAI API (): tts-1, tts-1-hd, and gpt-4o-mini-tts w/ instructions
• 🛜 (Updated) Server-side Sync and Storage
  • (New) External Library Import enables importing documents to the browser's storage from a folder mounted on the server
  • (Updated) Sync documents between the browser and server to get them on other browsers or devices
• 🎧 Server-side Audiobook Export in m4b/mp3, with resumable, chapter-based export and regeneration
• 📖 Read Along Experience providing real-time text highlighting during playback (PDF/EPUB)
  • (New) Word-by-word highlighting uses word-by-word timestamps generated server-side with whisper.cpp (optional)
• 🧠 Smart Sentence-Aware Narration merges sentences across pages/chapters for smoother TTS
• 🚀 Optimized Next.js TTS Proxy with audio caching and optimized repeat playback
• 🎨 Customizable Experience
  • 🎨 Multiple app theme options
  • ⚙️ Various TTS and document handling settings
  • And more ...

🐳 Docker Quick Start

Prerequisites

• Recent version of Docker installed on your machine
• A TTS API server (Kokoro-FastAPI, Orpheus-FastAPI, Deepinfra, OpenAI, etc.) running and accessible

Note: If you have good hardware, you can run Kokoro-FastAPI with Docker locally (see below).

1. 🐳 Start the Docker container:

Minimal (no persistence, auth disabled unless you set auth env vars):

docker run --name openreader-webui \
  --restart unless-stopped \
  -p 3003:3003 \
  ghcr.io/richardr1126/openreader-webui:latest

Fully featured (persistent storage + server library import + KokoroFastAPI in Docker + optional auth):

docker run --name openreader-webui \
  --restart unless-stopped \
  -p 3003:3003 \
  -v openreader_docstore:/app/docstore \
  -v /path/to/your/library:/app/docstore/library:ro \
  -e API_BASE=http://host.docker.internal:8880/v1 \
  -e API_KEY=none \
  -e BETTER_AUTH_URL=http://localhost:3003 \
  -e BETTER_AUTH_SECRET=<paste_the_output_of_openssl_here> \
  ghcr.io/richardr1126/openreader-webui:latest

You can remove the /app/docstore/library mount if you don't need server library import. You can remove both BETTER_AUTH_* env vars to keep auth disabled.

Notes:

• API_BASE should point to your TTS API server's base URL (if running Kokoro-FastAPI locally in Docker, use http://host.docker.internal:8880/v1).
• BETTER_AUTH_URL should be your externally-facing URL for this app (for example https://reader.example.com or http://localhost:3003).
• To enable auth, set both BETTER_AUTH_URL and BETTER_AUTH_SECRET generated with openssl rand -base64 32.
• If you set POSTGRES_URL, the container will not auto-run migrations for you; run npx @better-auth/cli migrate -y against your Postgres database.

Docker environment variables (Click to expand)

Variable	Purpose	Example / Notes
API_BASE	Default TTS API base URL (server-side)	http://host.docker.internal:8880/v1
API_KEY	Default TTS API key	none or your provider key
BETTER_AUTH_URL	Enables auth when set with BETTER_AUTH_SECRET	External URL for this app, e.g. http://localhost:3003 or https://reader.example.com
BETTER_AUTH_SECRET	Enables auth when set with BETTER_AUTH_URL	Generate with openssl rand -base64 32
POSTGRES_URL	Use Postgres for auth storage instead of SQLite	If set, run migrations manually (see note above)
GITHUB_CLIENT_ID	Optional GitHub OAuth sign-in	Requires GITHUB_CLIENT_SECRET
GITHUB_CLIENT_SECRET	Optional GitHub OAuth sign-in	Requires GITHUB_CLIENT_ID

Docker volume mounts (Click to expand)

Mount	Type	Recommended	Purpose	Example
/app/docstore	Docker named volume	Yes	Persists server-side storage (documents, audiobook exports, settings, SQLite DB if used)	-v openreader_docstore:/app/docstore
/app/docstore/library	Bind mount (host folder)	Optional + :ro	Exposes an existing folder of documents for Server Library Import	-v /path/to/your/library:/app/docstore/library:ro

To import from the mounted library: Settings → Documents → Server Library Import

Note: Every file in the mounted library is imported into the client browser's storage. Keep the library reasonably sized to avoid performance issues.

Visit http://localhost:3003 to run the app and set your settings.

2. ⚙️ Configure the app settings in the UI:

• Set the TTS Provider and Model in the Settings modal
• Set the TTS API Base URL and API Key if needed (more secure to set in env vars)
• Select your model's voice from the dropdown (voices try to be fetched from TTS Provider API)

3. ⬆️ Updating Docker Image

docker stop openreader-webui && \
docker rm openreader-webui && \
docker pull ghcr.io/richardr1126/openreader-webui:latest

🗣️ Local Kokoro-FastAPI Quick-start (CPU or GPU)

You can run the Kokoro TTS API server directly with Docker. We are not responsible for issues with Kokoro-FastAPI. For best performance, use an NVIDIA GPU (for GPU version) or Apple Silicon (for CPU version).

Kokoro-FastAPI (CPU)

docker run -d \
  --name kokoro-tts \
  --restart unless-stopped \
  -p 8880:8880 \
  -e ONNX_NUM_THREADS=8 \
  -e ONNX_INTER_OP_THREADS=4 \
  -e ONNX_EXECUTION_MODE=parallel \
  -e ONNX_OPTIMIZATION_LEVEL=all \
  -e ONNX_MEMORY_PATTERN=true \
  -e ONNX_ARENA_EXTEND_STRATEGY=kNextPowerOfTwo \
  -e API_LOG_LEVEL=DEBUG \
  ghcr.io/remsky/kokoro-fastapi-cpu:v0.2.4

Adjust environment variables as needed for your hardware and use case.

Kokoro-FastAPI (GPU)

docker run -d \
  --name kokoro-tts \
  --gpus all \
  --user 1001:1001 \
  --restart unless-stopped \
  -p 8880:8880 \
  -e USE_GPU=true \
  -e PYTHONUNBUFFERED=1 \
  -e API_LOG_LEVEL=DEBUG \
  ghcr.io/remsky/kokoro-fastapi-gpu:v0.2.4

Adjust environment variables as needed for your hardware and use case.

⚠️ Important Notes:

• For best results, set the -e API_BASE= for OpenReader's Docker to http://kokoro-tts:8880/v1
• For issues or support, see the Kokoro-FastAPI repository.
• The GPU version requires NVIDIA Docker support and works best with NVIDIA GPUs. The CPU version works best on Apple Silicon or modern x86 CPUs.

Local Development Installation

Prerequisites

• Node.js (recommended: use nvm)

• pnpm (recommended) or npm

  npm install -g pnpm
  

• A TTS API server (Kokoro-FastAPI, Orpheus-FastAPI, Deepinfra, OpenAI, etc.) running and accessible Optionally required for different features:

• FFmpeg (required for audiobook m4b creation only)

  brew install ffmpeg
  

• libreoffice (required for DOCX files)

  brew install libreoffice
  

• whisper.cpp (optional, required for word-by-word highlighting)

  # clone and build whisper.cpp (no model download needed – OpenReader handles that)
  git clone https://github.com/ggml-org/whisper.cpp.git
  cd whisper.cpp
  cmake -B build
  cmake --build build -j --config Release
  
  # point OpenReader to the compiled whisper-cli binary
  echo WHISPER_CPP_BIN=\"$(pwd)/build/bin/whisper-cli\"
  

  Note: The WHISPER_CPP_BIN path should be set in your .env file for OpenReader to use word-by-word highlighting features.

Steps

1. Clone the repository:

   git clone https://github.com/richardr1126/OpenReader-WebUI.git
   cd OpenReader-WebUI
   

2. Install dependencies:

   With pnpm (recommended):

   pnpm i # or npm i
   

3. Configure the environment:

   cp template.env .env
   # Edit .env with your configuration settings
   

   Auth is recommended for contributors and is enabled when both values are set:

   • Set BETTER_AUTH_URL to your local URL (default: http://localhost:3003)
   • Generate a BETTER_AUTH_SECRET and paste it into .env:

     openssl rand -base64 32
     

   Note: To disable auth, remove either BETTER_AUTH_URL or BETTER_AUTH_SECRET.

   Note: The base URL for the TTS API should be accessible and relative to the Next.js server

4. Run auth DB migrations (required when auth is enabled):

   npx @better-auth/cli migrate -y
   

Note: If you set POSTGRES_URL in .env, migrations will target Postgres instead of local SQLite.

5. Start the development server:

   With pnpm (recommended):

   pnpm dev # or npm run dev
   

   or build and run the production server:

   With pnpm:

   pnpm build # or npm run build
   pnpm start # or npm start
   

   Visit http://localhost:3003 to run the app.

💡 Feature requests

For feature requests or ideas you have for the project, please use the Discussions tab.

🙋‍♂️ Support and issues

If you encounter issues, please open an issue on GitHub following the template (which is very light).

👥 Contributing

Contributions are welcome! Fork the repository and submit a pull request with your changes.

❤️ Acknowledgements

This project would not be possible without standing on the shoulders of these giants:

• Kokoro-82M model
• Kokoro-FastAPI
• whisper.cpp
• ffmpeg
• react-pdf npm package
• react-reader npm package

Docker Supported Architectures

• linux/amd64 (x86_64)
• linux/arm64 (Apple Silicon, Raspberry Pi, SBCs, etc.)

Stack

• Framework: Next.js (React)
• Containerization: Docker
• Storage:
  • Dexie.js IndexedDB wrapper for client-side storage
• PDF:
  • react-pdf
  • pdf.js
• EPUB:
  • react-reader
  • epubjs
• Markdown/Text:
  • react-markdown
  • remark-gfm
• UI:
  • Tailwind CSS
  • Headless UI
  • @tailwindcss/typography
• TTS: (tested on)
  • Deepinfra API (Kokoro-82M, Orpheus-3B, Sesame-1B)
  • Kokoro FastAPI TTS
  • Orpheus FastAPI TTS
• NLP:
  • compromise NLP library for sentence splitting
  • cmpstr String comparison library
  • whisper.cpp for TTS timestamps (word-by-word highlighting)

License

This project is licensed under the MIT License.