Sentō
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Overview
Sentō (Sento) adds a floating AI rewrite bubble to any editable field on any website. Select text, pick a template, and apply the result in place. No copy paste, no tab switching.
Works with textareas, rich text editors, ProseMirror, Confluence, Jira, and any contenteditable element.
FOUR REWRITE TEMPLATES
• Fix, correct grammar, spelling, and clarity without changing your tone
• Pro, clean professional rewrite, concise and direct
• Mine, your own custom instruction, set once in Settings
• Trim, cut the text by about 40% while keeping the key points
BRING YOUR OWN KEY
Sentō is BYOK. Connect the AI provider you already use by pasting an API key in Settings. Any OpenAI-compatible endpoint works too, including local models through Ollama or LM Studio. You pay the provider directly. No subscription, no markup, no middleman.
HOW IT WORKS
• Select text in any editable field
• The rewrite bubble appears below your selection
• Pick a template, the AI rewrites the text
• Review the preview, then click Apply
FORCE INSERT MODE
Skip the preview entirely. Enable Force Insert in Settings to apply rewrites directly, or hold Shift when clicking a template for a one off apply.
PRIVACY BY DESIGN
• API keys stay on your device, stored locally
• Selected text goes directly from your browser to the AI provider
• No backend, no accounts, no analytics, no telemetry
SITE CONTROL
All Sites, Allow Only, or Block mode, control exactly where the bubble appears. You can also toggle individual sites from the extension popup.
OPEN SOURCE
https://github.com/artttj/sento
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Privacy Practices
🔐 Security Analysis
This extension hasn't been security-scanned yet.