TokenCalculator.dev is a privacy-first, browser-based LLM token calculator that counts tokens and estimates API costs for text, PDFs, DOCX, code, data files, and images. It processes content locally in your browser, ensuring no data leaves your device while providing accurate token counts and cost estimates across top AI providers.
Key benefits include:
- Privacy-First Processing: All content (text, files, images) is processed locally, with no data sent to external servers.
- Multimodal Token Counting: Counts tokens for text, PDFs, DOCX, code, data files, and images (PNG, JPEG, WebP, GIF) using provider-specific rules.
- Cross-Provider Comparison: Compares token counts and costs across OpenAI, Anthropic Claude, Google Gemini, and DeepSeek models.
- Accurate Estimations: OpenAI uses exact local BPE tokenization; other providers use provider-calibrated UTF-8 projections with clear accuracy labels.
- Workflow Planning: Helps plan document ingestion, multimodal requests, code analysis, and data pipeline workloads to optimize context fit and cost.
Perfect for developers, data scientists, and AI practitioners who need to plan LLM requests efficiently, compare provider costs, and ensure privacy when working with sensitive content.
