Word Counter & Token Estimator - GPT & Gemini Cost Tool

Word counter & token estimator for GPT and Gemini. Count CJK, estimate tokens, and project API cost with your pricingโ€”private, client-side. Try it today.

Desktop uses a split view; mobile stacks panels so your KPIs stay visible.

Words

0

Characters

0

Sentences

0

Paragraphs

0

Input Tokens

0

Output Tokens

0

Reading Time

0.0 min

Speaking Time

0.0 min

Avg Sentence Length

0.0 words/sentence

Estimated USD Cost

$0.0000

Estimated Local Cost: 0.00

Progress

0 / 1,200 (0.0%)

All counting runs locally in your browserโ€”no network calls.

How to Use

  1. Paste your article, prompt, or script.
  2. Review live counts and token estimates on the right.
  3. Select a model and enter your pricing, FX rate, and output multiplier.
  4. Click Copy Summary or Export CSV for reporting.

Core Features

  • Count words, characters, sentences, and paragraphs in real time.
  • Estimate input/output tokens for GPT- and Gemini-style models.
  • Calculate projected API cost from the pricing and FX rate you set.
  • Measure CJK character counts for Chinese/Japanese/Korean text.
  • Forecast reading and speaking time from adjustable WPM settings.
  • Export a shareable summaryโ€”everything stays local and private.

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Calculation Logic

  • Word splitting can use Intl.Segmenter when available for better accuracy.
  • Token counts are estimates: tokensโ‰ˆcharsratiotokens \approx \frac{chars}{ratio} (ratio varies by model and language).
  • Cost is computed from the prices you input, avoiding stale pricing tables.

FAQ

  • Is it free? Any limits?
    • Yesโ€”core counting and token estimation are free.
  • Is my text private? Do you upload it?
    • No. Everything runs client-side in your browser with no uploads.
  • How do I estimate GPT/Gemini API cost from text?
    • Paste text, choose a model, and enter your input/output prices plus output multiplier.
  • Why can estimated tokens differ from exact billed tokens? (Technical)
    • Tokenization rules differ by model and language; whitespace/punctuation/Unicode can change counts. Estimates are best for budgeting.
  • Does it handle CJK accurately?
    • Yesโ€”CJK-aware counting helps you budget prompts and scripts more reliably.