kaidu

Your AI is only as smart as your prompt.

Kaidu adds a sparkle button inside ChatGPT, Claude and Gemini. One click turns a vague request into a precise prompt, before you hit send.

Try one:
Prompt score 37
Add to Chrome, it's free Full AI rewrites: lifetime license

Chrome, Edge and Brave · No account · No server. Examples above are real outputs of Kaidu's free local mode.

Okay, but what does it actually do?

It reads what you typed, works out what kind of request it is, and adds only what's missing: the goal, the context, the format, the tone.

  1. Type as usualA dot on the sparkle shows how complete your prompt is.
  2. Click the sparkleOr press Alt+Shift+I. Watch it rewrite in place.
  3. Send a better promptSee what changed, tweak it or undo in one click.

Does it work where I already chat?

Yes. No new app, no copy-paste. The sparkle shows up right inside:

  • ChatGPT
  • Claude
  • Gemini
  • Perplexity
  • DeepSeek
  • Le Chat
  • Copilot

In Chrome, Edge and Brave. You can switch it off for any site in the settings.

What do I get?

Two modes in one extension: instant local fixes, and a full AI rewrite when you want it.

Local mode, free

Instant, offline, unlimited.

  • Works without internet
  • Code, writing, translation, summaries, analysis and more
  • English, French, Spanish, German, Italian, Portuguese
  • Prompt diagnosis and a reusable prompt library

AI mode, lifetime license

A real rewrite with your own key, one payment for life.

  • Anthropic, OpenAI, Google or any OpenAI-compatible service, or Chrome's free built-in AI
  • Clarifying questions, live preview, versions
  • One-click refinements: shorter, more polite, more formal
  • 5 free AI rewrites to try it

Where do my prompts go?

Nowhere you didn't choose. Kaidu has no server, no account and no tracking.

In local mode nothing leaves your browser. In AI mode your prompt goes straight from your browser to the provider you picked, with your key, or stays on your device with Chrome's built-in AI. Kaidu never sends a prompt that contains an API key or a card number.

Read the privacy policy

Is it another subscription?

No. One payment, and Kaidu is yours for life.

The extension and its local mode are free. The lifetime license unlocks AI mode: no monthly fee, no account, and the price goes up as more people join, so early users pay the least.

Get the lifetime license

A few more questions

Do I need an API key?

No. Local mode is free and works without one. For AI rewriting you can use a key from Anthropic, OpenAI, Google or any OpenAI-compatible service (you pay that provider directly), or Chrome's free built-in AI where available.

How do I activate my license?

After purchase, Gumroad emails you a license key. Open Kaidu's settings, go to AI & keys, paste the key and click Activate.

Does Kaidu change my text without asking?

Only when you click the sparkle or use the shortcut. Every change can be undone in one click, and you can turn on a preview so nothing is replaced until you confirm.

What if I want a refund?

Contact meshiphantom@gmail.com. Refunds are handled through Gumroad, and a refunded license stops unlocking AI mode.

Your next prompt deserves the sparkle.

Install the free extension and try it on whatever you were about to ask.

Add to Chrome, it's free