Sentō

Tracking since Apr 8, 2026.

Changelog

• Apr 25, 2026
  description

  Sentō 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
  
  Connect your OpenAI, Google Gemini, or Grok (xAI) API key. You pay the provider directly, no subscription, no markup.
  
  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

  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

• Apr 25, 2026
  host_permissions

  *://*/*, https://api.openai.com/*, https://api.x.ai/*, https://generativelanguage.googleapis.com/*

  *://*/*, https://api.openai.com/*, https://api.x.ai/*, https://generativelanguage.googleapis.com/*, https://openrouter.ai/api/*, https://api.zai.ai/*, https://api.anthropic.com/*

• Apr 25, 2026
  permissions

  storage, tabs

  storage, tabs, declarativeNetRequest

Permissions & access

Permissions

storagetabsdeclarativeNetRequest

Host access

*://*/*, https://api.openai.com/*, https://api.x.ai/*, https://generativelanguage.googleapis.com/*, https://openrouter.ai/api/*, https://api.zai.ai/*, https://api.anthropic.com/*

Screenshots

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