OpenAI Batch JSONL Validator

Each Batch input line needs a unique custom_id, a supported POST endpoint, and a request body. Check those basics before uploading your file to OpenAI.

{"custom_id":"request-1","method":"POST","url":"/v1/responses","body":{"model":"gpt-4.1-mini","input":"Hello"}}

Check Batch JSONL now

What this catches

Missing required fields and duplicate custom IDs.
Top-level schema drift between records.
Possible email addresses or API keys pasted into a dataset.
Approximate token volume for planning.

This is a preflight checker, not an OpenAI API call. Confirm current endpoint and model limits in the OpenAI Batch documentation.