Fix your mistakes live, everywhere

A free extension for Firefox and Chrome that proofreads and corrects your spelling and grammar in any text field: Gmail, Messenger, WhatsApp Web, forms, comments. A one-second pause, a bubble suggests the correction, a click applies it. No more back-and-forth to an outside checker.

Download for Chrome.zip archive · 75 KB · to unzip Download for Firefox.xpi file · 75 KB

Version 1.1.1. Extension published by Jimenez Julien. The full source code is included in the archive.

Two things to know before installing. The extension needs your own OpenAI API key (free to create, paid per use, a fraction of a cent per correction). And the text you type in the relevant fields is sent to OpenAI's servers to be corrected: do not use it for confidential content, and switch it off on sensitive sites from its icon. Password, email, phone, address and bank card fields are ignored by default.

What the extension does

✎

Live correction

A one-second pause after you type, and a bubble suggests the corrected version. "Apply" replaces, "Copy" puts it on the clipboard, "Dismiss" closes.

⌨

Everywhere, from the keyboard

In every text field on the web. Alt+Shift+C corrects the field instantly, Esc closes the bubble. An automatic mode applies corrections without asking.

✓

Discreet and careful

Sensitive fields ignored, code editors avoided, per-site switch-off available. The instructions forbid the checker from adding em dashes, and a safeguard removes any that slip through.

Install in Chrome

  1. Unzip the downloaded archive: you get a folder named correcteur-ia-live.
  2. Open chrome://extensions in the address bar.
  3. Turn on Developer mode (toggle in the top right).
  4. Click "Load unpacked" and select the unzipped folder.

The extension stays installed after a restart; Chrome only shows a "developer mode" notice at launch. The same folder also works in Edge, Brave and Opera, which share Chrome's engine.

Install in Firefox

Quick try (the extension disappears when Firefox restarts):

  1. Open about:debugging#/runtime/this-firefox.
  2. Click "Load Temporary Add-on".
  3. Select the downloaded .xpi file (or the manifest.json in the folder).

Permanent install: Firefox requires signed extensions. Mozilla signs them for free. Create an account on addons.mozilla.org, generate your API credentials, then sign the folder with the web-ext tool (web-ext sign --channel=unlisted): the signed .xpi file you get installs for good. The detailed procedure is provided in the README.md file of the archive. The .xpi offered here, unsigned, installs directly in Firefox Developer Edition, Nightly or ESR after setting xpinstall.signatures.required to false in about:config.

First setup: your OpenAI key

  1. Create a key on platform.openai.com/api-keys (an OpenAI Platform account, separate from the ChatGPT subscription) and add a few euros of credit.
  2. Click the extension icon, then "Open settings".
  3. Paste your key, click "Test connection" to check it, then "Save".

With the default model, one correction costs a fraction of a cent: five euros of credit last a very long time. The key stays stored on your computer and is only sent to api.openai.com.

Fix as you write, write better afterwards

This extension corrects on the fly while you write; the site's other tools step in before or after your texts. To set the case right, use the uppercase-lowercase converter; to count what you have written, the word counter; to tidy up a copy-paste, the text cleaner; and to prepare a title for the web, the slug generator. They are all gathered in the toolbox, and the spirit stays the same as the one described in our privacy policy: your texts belong to you.

Frequently asked questions

Is the extension free?

Yes, the extension is free and needs no account. It uses your own OpenAI API key, which is paid per use: with the default model, one correction costs a fraction of a cent, and a few euros of credit last a very long time. The key is created on platform.openai.com, a service separate from the ChatGPT subscription.

Does it work on Firefox and Chrome?

Yes, the same folder installs in both browsers. On Chrome, you load the extension in developer mode. On Firefox, you load it temporarily, or permanently after a free signature by Mozilla. The settings, including the API key, are specific to each browser and are not shared.

Is my text kept private?

The text of eligible fields is sent to OpenAI's servers to be corrected: do not use the extension for confidential content, or disable it on sensitive sites from its icon. Password, email, phone, address and bank card fields are ignored by default, as are code editors. Your API key stays stored locally and is only sent to api.openai.com.

How do I correct a field immediately?

Just type normally: after a pause of about one second, a bubble suggests the correction, which you apply with a click. To correct on the spot without waiting, use the Alt+Shift+C shortcut. The Esc key closes the bubble. An "automatic replacement" mode applies corrections without asking.

On which sites does it work?

In nearly all text fields on the web: Gmail, Messenger, WhatsApp Web, forms, comments, social networks. Google Docs is the exception, because its editor draws the text on a canvas that no standard extension can modify.