Privacy-first browser token and cost calculator for text, code, PDFs, and images across OpenAI, Claude, Gemini, and DeepSeek.
TokenCalculator.dev is a 100% browser-based, privacy-first LLM token counter and API cost estimator built for developers. Unlike traditional text-only counters, it processes prompts, local documents (PDF, DOCX, and codebases across 20+ languages up to 12 MB), and image files (PNG, JPEG, WebP, GIF) locally on the device with zero server uploads or prompt storage.
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