Estimate token counts and API costs for OpenAI, Anthropic, Google, Meta & DeepSeek models.
To calculate token costs: enter your expected token usage and select a provider (OpenAI, Anthropic, Google) — the tool compares per-token pricing and projects monthly costs.
FreeToolHub Token Calculator is a free browser-based tool that estimates API token costs across LLM providers, no signup.
LLM API prices are per 1M tokens as of June 2026 and may change without notice. Token estimates use model-specific chars-per-token ratios and may vary ±10-20% from actual counts.
About this tool
Count tokens and estimate API cost for GPT-4o, Claude and Gemini. Free, instant.
What Is the LLM Token?
The LLM Token is a free browser-based developer tool that handles token calculator operations entirely on your device without any server round-trips. Built with standard web APIs and JavaScript, it processes your input locally — no code, data, or file content is ever uploaded to a remote server. The tool supports LLM cost estimator standards and handles edge cases like Unicode characters, special encoding modes, and large inputs. Performance is optimized for files up to 10MB+ using streaming parsers where applicable. Unlike online alternatives that require accounts or impose usage limits, this tool is completely free with no caps.
Who Should Use This Tool?
Software developers use this tool daily for token calculator tasks during coding, debugging, and deployment workflows. DevOps engineers rely on it for quick LLM cost estimator conversions when configuring servers or CI/CD pipelines. QA testers validate GPT token counter outputs against expected values. Students learning web development use it as a reference tool to understand how encoding and formatting actually work. Technical writers format code examples for documentation. The tool is especially valuable in secure environments where corporate policy prohibits pasting code into external websites — everything stays local.
How to Use the LLM Token
Paste or type your input into the text area — the tool processes it instantly with no submit button needed. For token calculator operations, select your desired mode or options from the dropdown controls. The output panel shows results in real time with syntax highlighting where applicable. Use the copy button to transfer results to your clipboard. For batch operations, the tool handles multiple inputs separated by newlines. All processing happens in your browser's JavaScript engine — close the tab and your data is gone. Keyboard shortcuts (Ctrl+Enter) trigger the primary action for power users.
Frequently asked
How accurately does it count tokens for AI models?
It uses model-specific tokenization rules (GPT-4o uses o200k_base at ~4 chars/token; Claude uses a similar BPE at ~3.8 chars/token). Paste your text to get exact token counts for input and output, then multiply by current API rates. A 1,000-word document is roughly 1,300-1,400 tokens depending on the model.
How much will my AI API usage cost per month?
Enter your average prompt length, response length, and daily request volume. At GPT-4o rates ($2.50/1M input, $10/1M output tokens), 1,000 requests/day with 500-token prompts and 800-token responses costs approximately $117/month. The tool compares costs across GPT-4o, Claude, Gemini, and DeepSeek simultaneously.
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