Chat & Fine-Tuning JSONL Dataset Validator
Validate provider-neutral chat-message or prompt/completion JSONL datasets for LLM fine-tuning before upload by detecting syntax, role, content, assistant-example problems, duplicates, and estimating tokens.
Runs locally in your browserJSONL dataset
Validate structure before uploading training data
This provider-neutral check covers JSONL syntax, roles, content, assistant examples, duplicates and approximate size. Always run the target provider’s current validation and policy checks before creating a job.