Correctify uses YOUR own API key: you pick your AI provider, and nothing goes through our servers. Here is, step by step, how to create a key with each of the three supported providers.
An API key is a personal code that lets the app use the AI on your behalf. You create one only once, paste it into Correctify’s options, and you’re done. Pick whichever provider suits you — Google Gemini has a free tier, perfect to get started.
Correctify recognizes the provider automatically from the start of the key: a key beginning with “AIza…” is treated as Google Gemini, “sk-ant-…” as Anthropic (Claude), and “sk-…” as OpenAI (ChatGPT). You don’t have to select anything.
The easiest way to start: Google AI Studio offers a free tier that’s more than enough for everyday text correction.
Open Google AI Studio and sign in with your Google account.
Click “Get API key” in the top-left.
Click “Create API key”, then agree to create or select a Google Cloud project if prompted.
Your key appears (it starts with “AIza…”). Click the copy icon.
Paste it into Correctify’s options, in the “API key” field. Done.
Key format : AIza…
To use OpenAI’s models (the same as ChatGPT). API usage is billed per use: you need to add a payment method and a little credit.
Create an account (or sign in) on the OpenAI platform.
In “Billing”, add a payment method and a small amount of credit — correcting text only costs a few cents.
Open the “API keys” page, then click “Create new secret key”.
Give it a name, confirm, then copy the key IMMEDIATELY (it starts with “sk-…”): it will never be shown again.
Paste it into Correctify’s options, in the “API key” field.
Key format : sk-…
To use Anthropic’s Claude models. Like OpenAI, the API is billed per use: add a little credit to your account.
Create an account (or sign in) on the Anthropic console.
In “Billing” (Plans), add a payment method and some credit.
Open “API Keys”, then click “Create Key”.
Name the key, confirm, then copy it (it starts with “sk-ant-…”): keep it safe, it’s shown only once.
Paste it into Correctify’s options, in the “API key” field.
Key format : sk-ant-…
Open Correctify’s options (right-click the icon → Options, or the extension’s gear), paste your key into the “API key” field, and save. The provider is detected on its own. Your key stays on your device and is never sent to Correctify.
An API key is like a password: don’t share it with anyone and don’t post it anywhere. If you think it leaked, delete it from the provider’s dashboard and create a new one.
…you can treat me to a coffee! 😊 The extension is free and always will be: no ads, no account, no data collection. It’s a little project I tinker with on my own in my spare time, and every coffee keeps me motivated to make it better. Thanks a lot — it really means a lot!
