AI Training Data Formatter

Convert training data between JSONL, CSV, and chat completion formats for fine-tuning OpenAI, Anthropic, and other LLMs. Validate and preview your dataset.

Drop or click to upload a file (.jsonl, .csv, .json, .txt)
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Input Data

Output

How to Use the Training Data Formatter

  1. Paste or upload your training data in any supported format.
  2. Select input and output formats (or use auto-detect).
  3. Click Convert to transform the data.
  4. Validate to check for errors before uploading to OpenAI or Anthropic.
  5. Download the converted file in the correct format.