---
title: Try Proofbird Grammar
emoji: 🐦
colorFrom: purple
colorTo: indigo
sdk: static
app_file: index.html
pinned: true
license: apache-2.0
models:
- proofbird/gector-bert-en
- proofbird/gector-bert-it
- proofbird/gector-bert-es
- proofbird/gector-bert-fr
- proofbird/gector-bert-de
short_description: Proofbird grammar models, running in your browser
---

# Try Proofbird Grammar

Proofbird's on-device grammar models — English, Italian, Spanish, French and German — running **in your browser**.
The model is downloaded once (about 450 MB per language, then kept by your browser) and runs on your own computer with
ONNX Runtime Web; the text you type is never sent anywhere.

What the page runs is a line-by-line JavaScript port of each model's `quickstart.py` (`gector.js`): the same
tokenizer, the same five passes, the same suggestions — checked against the Python file on all 2 549 gold sentences of
the five models (identical token ids, corrections and suggestions). Like the Proofbird app, it checks one sentence at a
time.

This is the model on its own. The [Proofbird](https://proofbird.app) app adds the guards in each model's
`gector-guards.json`, a spell checker, and an explanation for each change.

| Model | Version | Licence |
|---|---|---|
| [gector-bert-en](https://huggingface.co/proofbird/gector-bert-en) | 1.0.0 | Apache-2.0 |
| [gector-bert-it](https://huggingface.co/proofbird/gector-bert-it) | 1.0.0 | Apache-2.0 |
| [gector-bert-es](https://huggingface.co/proofbird/gector-bert-es) | 1.2.0 | CC BY 4.0 |
| [gector-bert-fr](https://huggingface.co/proofbird/gector-bert-fr) | 1.1.0 | Apache-2.0 |
| [gector-bert-de](https://huggingface.co/proofbird/gector-bert-de) | 2.1.0 | Apache-2.0 |

The page's own code (`index.html`, `app.js`, `gector.js`) is Apache-2.0. Built by Patrick Andrew Hartnett.