ghosttyper-bs-ext
GhostTyper
Live site: https://ghosttyper-bs-ext.oriz.in
Copilot-style inline AI writing suggestions in any text field — Gmail, Notion, Twitter, web forms, anywhere. Press Tab or Right Arrow to accept. 100% client-side, no backend, no telemetry.
What it does
As you type, GhostTyper fetches a short AI completion for the text before your cursor and renders it inline as greyed-out ghost text. Keep typing to dismiss; press Tab or Right Arrow to accept instantly.
7 providers (all free-tier)
| Provider | Key required | Default model | Notes |
|---|---|---|---|
| Pollinations (default) | No | openai | Zero-config. Works immediately. |
| Groq | Yes | llama-3.3-70b-versatile | console.groq.com |
| Cerebras | Yes | llama-3.3-70b | cloud.cerebras.ai |
| Google Gemini | Yes | gemini-2.0-flash | aistudio.google.com |
| OpenRouter | Yes | deepseek/deepseek-r1:free | openrouter.ai |
| Mistral | Yes | mistral-small-latest | console.mistral.ai |
| Custom | Optional | Your choice | Any OpenAI-compatible endpoint |
Install
- Download ghosttyper.zip from the latest release.
- Unzip the file.
- Open Chrome (or Edge / Brave / Arc) and go to
chrome://extensions. - Enable Developer mode (top right).
- Click Load unpacked and select the
extension/folder.
No account. No sign-up. Works immediately with the Pollinations default.
How it works
- Content script monitors text inputs across all tabs.
- After a 150ms debounce, the context prefix (text before cursor) is sent to the service worker.
- Service worker checks an in-memory LRU cache (64 entries), then calls your configured provider via OpenAI-compatible
/chat/completions(max_tokens=64,temperature=0). - Suggestion renders as an overlay (mirror technique for
<input>/<textarea>; Selection/Range API ghost span forcontentEditable). - Tab or Right Arrow accepts; Esc / arrow keys / Enter dismiss.
UX optimisations (Copilot-tier)
- Typing-as-suggested: if you keep typing characters that match the current suggestion, the remainder is shown instantly without a new API call.
- LRU cache: repeated prefixes never hit the network.
- Silent-disable: after 3 consecutive provider errors, ghost text silently stops for that tab session — no error spam.
- Min/max line guards: fires only when current line has 3–240 chars.
Privacy
GhostTyper is 100% client-side. Text goes browser → your chosen provider. No GhostTyper server exists.
Sensitive fields always excluded — GhostTyper never reads or sends text from:
input[type=password]- Credit-card fields (
autocomplete=cc-*: cc-number, cc-csc, cc-exp, cc-name, cc-type) - Hidden inputs
- Inputs whose name/id match credit-card patterns
See Privacy Policy for full details.
Keyboard shortcuts
| Key | Action |
|---|---|
| Tab | Accept suggestion |
| Right Arrow | Accept suggestion (fallback — useful when Tab is remapped) |
| Esc | Dismiss suggestion |
| Any other key | Keep typing (dismisses suggestion) |
Configuration
Open the extension popup and click Open Settings.
| Setting | Default | Description |
|---|---|---|
| Provider | Pollinations | AI provider |
| API Key | (empty) | Not needed for Pollinations |
| Model | (provider default) | Override the model |
| Custom Base URL | (empty) | For Custom provider |
| Trigger Delay | 150ms | Debounce before fetching |
| Presentation Mode | Inline | Inline / Popup / Panel |
| Blocked Sites | (empty) | Domains where suggestions are disabled |
Contributing
PRs welcome. Open an issue first for large changes.
git clone https://github.com/chirag127/ghosttyper-bs-ext
# Load extension/ unpacked in Chrome for development
# Run tests:
node --test tests/
License
MIT — see LICENSE.