How accurate are the token estimates?

OpenAI and Codex counts are exact using offline tokenizers. Claude uses official API counts when keys are provided, while DeepSeek and other profiles use transparent heuristic estimations.

Can I estimate tokens for chat messages instead of raw text?

Yes, you can switch the Count Mode option from Raw Text to Chat Message to simulate chat format overhead.

What file formats does the estimator support?

You can upload TXT, Markdown (MD), CSV, JSON, and log files up to 20MB.

Does this tool support multilingual text?

Yes, it automatically detects mixed scripts including Chinese Han, Latin, Kana, Hangul, Cyrillic, Arabic, emojis, and code lines.

Are my API keys or text data stored?

No, all text processing and offline tokenization happen locally, and API calls are made directly to the providers without storing your data.

Elysia Tools

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AI Token Estimator

Analyze language mix and estimate token usage across OpenAI, Codex, Claude, and DeepSeek profiles

Details

What this tool helps you do

Estimate token usage for pasted text or uploaded TXT/Markdown files.

What it does:

Detects mixed language/script composition, including Chinese Han, Latin, Kana, Hangul, Cyrillic, Arabic, emoji, symbols, and code-like lines
Counts OpenAI / Codex o200kbase and OpenAI cl100kbase with an offline tokenizer
Counts Claude with Anthropic counttokens when CLAUDEAPIKEY or ANTHROPICAPI_KEY is available, and falls back to heuristic only if the official call fails
Estimates DeepSeek token usage with transparent heuristics when exact provider token counters are unavailable
Marks each profile as exact-offline-tokenizer, official-provider-api, or heuristic so the result does not overclaim precision

Execution

Run this tool

Fill in the form, run the tool, and review the result in one place.

Prepared example runs

Click an example to fill the form automatically. File inputs still need an upload.

1 examples

Estimate a mixed Chinese and English prompt

Analyze a short mixed-language instruction before sending it to multiple AI models

{"result":{"input":{"characters":37},"language":{"primary":"Latin","mixed":true},"estimates":[{"profile":"openai-codex-o200k-base"}]}}

Inputs

Set the required fields, then run the tool.

4 options

FilesUpload source files for this workflow.1

Text FilefileOptional

Single file max size: 20 MBSupported types: text/plain, text/markdown, .txt, .md, .csv, .json, .log

ContentPaste or type the main input values.1

Input TexttextareaOptional

SettingsAdjust formats, ranges, numbers, and modes.2

Model ProfilesselectOptionalCount ModeselectOptional

Result

Ready for a run

Run the tool to preview files, text, structured data, or streamed output here.

Samples

AI Token Estimator

What this tool helps you do

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Inputs

Result

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Key facts

Overview

When to use

How it works

Use cases

Examples

1. Estimating Multilingual Prompt Tokens

2. Checking Markdown Documentation Size

FAQ

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CSV Samples

Python Samples

JWT Samples

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