ChatGPT · Claude.ai · Gemini

Compress Your Browser AI Prompts

Terse reads from ChatGPT, Claude.ai, and Gemini via macOS Accessibility APIs — no extension needed. Compresses prompts by 40–70% before you send. Fully on-device.

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40–70%prompt compression
Noextension required
4+AI chat apps supported
100%on-device, private

How Terse Works with Browser AI

Terse uses macOS Accessibility APIs — the same technology as screen readers — to read and optimize text in your browser tabs without any extension.

chatgpt.com
Terse Active
Hello! I'm ChatGPT. How can I help you today?
I was wondering if you could possibly help me understand how I might go about implementing a rate limiting solution for my REST API? I think it would be really helpful if you could explain the different approaches that might be available. Explain rate limiting approaches for REST APIs. What implementation options exist? Terse: 58 → 17 tokens · saved 71% · Normal mode
Terse compressed before sending — filler & hedging removed, meaning preserved
−71% tokens
Message ChatGPT…
🌐

No Extension Needed

Terse is a native macOS app using Accessibility APIs — not a browser extension. Works with Chrome, Safari, and any macOS browser without installation or permissions in the browser itself.

Native macOS
👁️

Auto-Detects AI Tabs

When you switch to a ChatGPT, Claude.ai, or Gemini tab, Terse auto-detects the textarea and shows the floating optimizer bar — no manual activation needed.

Auto-detect
🔒

Fully Private

All compression happens on your device using a Rust engine. Your prompts and conversations are never sent to Terse's servers. Zero data leaves your Mac.

On-Device
⚡

Instant Compression

Terse processes your prompt in under a millisecond. The optimized version appears in the floating bar before you've finished typing, with live token count and savings percentage.

<1ms
🔄

One-Click Replace

Hit Replace in the Terse bar to swap your draft with the compressed version. Or enable Auto mode to compress every message automatically before it's sent.

Frictionless
✏️

3 Compression Modes

Soft (typo fix only), Normal (filler and hedging removal), Aggressive (maximum compression). Choose per-session based on how much precision your prompts need.

Flexible

Works with All Major AI Chat Apps

One app, every browser-based AI assistant on macOS.

💬
ChatGPT
chatgpt.com
🤖
Claude.ai
claude.ai
✨
Gemini
gemini.google.com
🔍
Perplexity
perplexity.ai

Frequently Asked Questions

Everything about using Terse with browser-based AI.

How does Terse work with ChatGPT?
Terse uses macOS Accessibility APIs to read text from your browser's ChatGPT textarea. When you focus the tab, a floating bar shows the compressed version. One click replaces your draft, or Auto mode compresses every message automatically.
Does Terse need a browser extension?
No. Terse is a native macOS app using Accessibility APIs — the same technology as screen readers. No browser extension required. Works with Chrome, Safari, and all macOS browsers.
Does it work with Claude.ai and Gemini too?
Yes. Terse works with any browser-based AI assistant using a standard textarea, including ChatGPT, Claude.ai, Gemini, and Perplexity. The same floating bar appears automatically for each.
How much can Terse save on ChatGPT costs?
GPT-4o costs $2.50/M input tokens. Terse reduces prompt token count by 40–70%, directly cutting that input cost. For heavy users sending 100+ messages/day, this translates to $15–50/month in savings on API costs.
Is Terse safe to use with ChatGPT?
Yes. All text processing is 100% on-device using a Rust engine. Nothing is sent to Terse's servers. Your prompts and conversations remain completely private.
Is there a free trial?
Yes — both plans include a 30-day free trial with no charge until the trial ends. Pro is $4.99/mo, Premium is $99/mo. Cancel anytime.

Also Works With

Terse supports AI coding tools alongside browser-based AI assistants.

⚡Claude Code — CLI Agent→ ⌨️Cursor — AI Code Editor→ 🤖Aider, OpenClaw, Copilot CLI→

Smarter Prompts, Lower Bills

30-day free trial. No credit card required until your trial ends. Works with ChatGPT, Claude.ai, Gemini, and more.

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