StetProof

Fix the words. Keep the file.

Open an HTML document, click any text and type. What you save is the file you opened, with only the words you changed replaced: the markup, indentation, comments and entities all exactly as they were.

or drop one anywhere on this page

Nothing is uploaded
Your document is opened and edited in this browser tab. It is not sent anywhere, unless you turn on AI with your own key, and then only the paragraphs you ask about, to the service you chose.
Saving
Checking what this browser allows…
What you can change
Words, and adding another paragraph, list or table like one already there. Not layout, styling or images: that restraint is what keeps the file intact.

Settings

Signs your comments and the list of changes. Not a sign-in: anyone can type any name.

AI suggestions optional

Rewrites, proofreading and replies to comments, using your own key. Off until you add one. Only the words of the paragraphs involved are sent, only when you ask, straight from this browser to the address below; nothing changes until you accept a suggestion.

What AI may do

Kept in this browser’s storage for this app only, not synced, never sent anywhere but the address above. The service must accept requests from a web page; Anthropic, OpenAI, OpenRouter and Gemini do, and a local server may need to be told to (for Ollama, OLLAMA_ORIGINS).