ThreadCast

Threads, now a podcast. Natural multi-voice narration for Reddit posts and comments.

### 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. --- ### 🎙 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 --- ### 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. --- ### 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.