Threadcast

### Threads, now a podcast.

ThreadCast turns any Reddit thread into a hands-free listening experience. Build a queue, press play, and let it narrate posts and top comments aloud — perfect for commuting, chores, the gym, or winding down for sleep.

Three voice engines, eleven AI neural voices, eleven ambient soundscapes, full multi-voice narration. All on-device. All free. No accounts, no ads, no tracking.

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### 🎙 Three voice engines, your choice

ThreadCast ships with three different TTS engines so you can pick the trade-off that matches your machine:

- **System voices** — instant. Uses the voices already installed on your operating system (Windows, macOS, Linux). Zero downloads, zero setup.
- **AI neural · CPU** — natural-sounding speech from a 28-million-parameter neural model. Runs entirely on your CPU via WebAssembly. Downloads once (~30 MB per voice), then plays offline forever.
- **AI neural · GPU** — premium quality from an 82-million-parameter neural model with eleven distinct voices and accents. Runs on your GPU via WebGPU. Downloads once (~310 MB), then plays offline forever.

Switch engines at any time from the popup. ThreadCast remembers your pick.

### 🗣 Multi-voice narration

Each Reddit author gets their own consistent voice. ThreadCast detects gender from username cues and pronouns, then assigns a voice from the rotation — so a thread reads like a real conversation between distinct people, not a single monotone reading.

- Pick how many voices to rotate (up to 10)
- Filter voices by accent
- Set per-author overrides that persist across sessions
- Preview any voice before committing

### 📰 Posts AND comments

Add the post and the conversation. Or add comments only. Or specific comments, by clicking + on each one. Drag items in the queue to reorder. Skip, scrub, jump back — full transport control with a drag-to-seek scrubber so you can rewind that punch line.

### 😴 Sleep mode with ambient soundscapes

A separate playback mode designed for falling asleep. Slowed narration layered over a choice of ten ambient soundscapes:

Calm Night · Time · Twilight · Flute · Ocean · Lullaby · Stillness · Drift · Mellow · Cradle

Set a sleep timer (15 / 30 / 60 / 90 minutes, or "until queue ends") and ThreadCast fades out gracefully so you drift off without a hard cut. Independent voice and ambient mix sliders. Configurable sleep playback rate.

### ⚙ Power-user settings

A full options page with:

- Speed, pitch, volume, and inter-sentence pause sliders
- Multi-voice rotation control with manual overrides
- Voice catalog with previews for every engine
- Per-author voice overrides
- Sleep mode rate, ambient category, and fade-out duration
- Engine-specific download manager with per-file progress bars
- Export / import all your settings as JSON

### 🔒 Private by design

ThreadCast does not collect, transmit, or store what you read on Reddit. Speech synthesis runs entirely on your device — no audio is ever sent to a server.

The optional AI neural engines download model weights once from a public Hugging Face mirror (huggingface.co/Pixel-Labs/threadcast-neural-models). After that, they run fully offline forever.

No tracking. No analytics. No ads. No accounts.

Full privacy policy: https://threadcast.app/legal/privacy

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### How to use

1. Install ThreadCast from the Chrome Web Store.
2. Open Reddit (reddit.com or sh.reddit.com).
3. Hover any post or comment and click the **+** chip to add it to the queue.
4. Click the ThreadCast icon in your toolbar and press **▶ Play**.
5. Open **⚙ Settings** to switch engines, customise voices, and configure sleep mode.

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### Supported platforms

- Chrome 113+ (and Chromium-based browsers: Edge, Brave, Opera, Vivaldi, Arc)
- Manifest V3
- Reddit: new Reddit (`reddit.com`, `sh.reddit.com`). old.reddit.com is not supported.
- Language: English (United States, United Kingdom)
- WebGPU is required only if you choose the GPU AI neural engine

### Open source

ThreadCast is free forever for Reddit. No subscriptions. No accounts. No ads.

### Support

- Email: support@threadcast.app
- Privacy: privacy@threadcast.app
- Website: https://threadcast.app

ThreadCast is an independent project and is not affiliated with, endorsed by, or sponsored by Reddit, Inc.