Pevlika Browser Apps

Knowledge Base Token Estimator

Drop your knowledge-base documents to estimate total tokens, chunks and embedding cost.

Runs in your browser — nothing is uploaded

How to use Knowledge Base Token Estimator

  1. Drop files or choose them (text-based formats, up to 50 MB in total).
  2. See tokens per file and in total for each model family.
  3. Check whether they fit a model’s context window and what embedding them costs.

Formula & assumptions

  • Counts are estimates: the tokenizer approximation was calibrated against OpenAI’s o200k_base (typically within a few percent for English prose and code; up to about 20% off for some other languages). Nothing you paste leaves your browser.
File Token EstimatorEstimate tokens in text, Markdown, code, CSV and JSON files. AI Token CounterCount tokens for GPT, Claude and Gemini, with context usage and cost. Embedding Cost CalculatorOne-time embedding cost, vector count and storage for a document set. RAG Chunk Count CalculatorNumber of chunks for a corpus at a chunk size and overlap.