Context telemetry for AI

Your AI has a
fuel gauge now.

See context burn in real time.
Know when your model is about to forget.

One-time purchase Chrome extension Runs locally

SIGNAL STABLE
23.976 FPS
TokenMeter
⌖⋮
Context fuel● LIVE
0%50%100%
78%

Context remaining~31,200 tokens left

⌁ NORMAL

Context window128Ktokens

Tokens used96,800tokens

Est. room31,200tokens

Context burn (tokens / min)
−15m−10m−5mNow

01 / THE INVISIBLE PROBLEM

Every long AI chat has a hidden cliff.

One minute your model knows the brief. The next, it drops constraints, repeats itself, or forgets a decision from 40 messages ago.

TokenMeter makes the invisible visible—before the quality falls off.

01

“Why is it repeating itself?”

Your working context is filling up.

02

“Why did it forget the brief?”

Earlier instructions may be dropping out.

03

“Should I start a new chat?”

Now you have a signal, not a hunch.

02 / ZERO-FRICTION TELEMETRY

Install. Chat.
Watch the fuel.

  1. 1Load the extensionChrome takes under a minute.
  2. 2Open your AI chatChatGPT, Claude, Gemini, or Perplexity.
  3. 3See context burn liveMove the gauge or choose your model window.
TokenMeter
⌖⋮
Context fuel● LIVE
0%50%100%
78%

Context remaining~31,200 tokens left

⌁ NORMAL
THE HONEST
GAUGE

03 / NO FAKE PRECISION

Useful enough to change behaviour. Honest enough to trust.

AI chat websites do not expose every hidden system prompt, tool payload, truncation rule, or provider tokenizer. TokenMeter estimates the visible conversation locally and shows the result as a practical fuel gauge—not as billing data.

  • ✓ Visible conversation measured on-device
  • ✓ Selectable 32K to 1M context presets
  • ✓ No account, analytics, or prompt collection

Ship with context awareness

Stop guessing when to start a new chat.

A tiny instrument for people doing serious work with AI.

€19one time
lifetime use
✓ Chrome extension✓ Instant ZIP download✓ All supported AI sites✓ Future 1.x updates

Secure checkout by Stripe · Promotion codes accepted · Download unlocks after verified payment

04 / FAQ

Does TokenMeter read or upload my prompts?+

No. The estimate is calculated in your browser from visible page text. The extension contains no analytics or external network requests.

Is the token count exact?+

No browser overlay can see hidden provider context. TokenMeter is deliberately an estimate and clearly labels itself that way.

Which AI tools does it support?+

The first release supports ChatGPT, Claude, Gemini, and Perplexity. Its selectors are designed with fallbacks because these sites evolve.

How do I install it?+

After payment, download and unzip TokenMeter. Open Chrome Extensions, enable Developer mode, choose Load unpacked, and select the folder.