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Token visualizer

Paste text and see Exact OpenAI token pieces as colored chips. Hover a chip for its token ID. Compare o200k and cl100k without inventing fake Claude or Gemini boundaries.

Tokenizer · Tokenizer comparison · Tokens ↔ words · Token visualizer guide

Piece maps are Exact for these OpenAI encodings only. For Claude or Gemini counts, use tokenizer comparison (Approx labels).

Tokens
31 (Approx)
Words
19
Characters
123
Chars / token
3.97
Pieces shown
0

Token pieces

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How to use this

  1. Pick o200k or cl100k to match the OpenAI-family model you care about.
  2. Paste a prompt, or try English, code, emoji, CJK, or JSON samples.
  3. Read the chips and hover for token IDs. Spot wasteful splits.
  4. Open the cost calculator or tokenizer comparison when you need spend or cross-provider counts.

Full tokenizer · Cost calculator · How LLMs split text · Exact vs fake boundaries

Related tools

Tokenizer comparison · Token counter · Tokens ↔ words

Related guides

Token visualizer: see colored token pieces · How LLMs split text into tokens · tiktoken o200k / cl100k · Code and emoji tokens · Exact vs fake boundaries

Sources and references

Official documentation used for definitions, counting methods, or rate cards. Always confirm critical budgets on the provider page.

FAQ

What is a token visualizer?
A tool that shows how text splits into token pieces, usually as colored chips with optional token IDs. TokenCalculator’s Exact visualizer covers OpenAI o200k and cl100k encodings.
Is the visualization Exact for Claude and Gemini?
No. Those tokenizers are not public in the browser. We show Approx counts elsewhere and refuse fake colored boundaries so you are not misled.
What is the difference between o200k and cl100k visualization?
Different vocabularies and merge rules. The same string can produce different piece maps and counts. Switch encodings here to compare Exact OpenAI splits.
How does visualization help reduce prompt cost?
You spot wasteful patterns (verbose JSON keys, repeated whitespace, emoji-heavy fluff) before you scale volume. Then open the cost calculator with a cleaner prompt.