JSONL Editor — Fine-Tuning Data Builder for OpenAI

Tip: drag block header to reorder blocks. Drag whole message block to reorder messages.

Blocks: 0

Run Custom JS

Write code that receives blocks and must return a new array.

// Example
return blocks.map(b => ({
    messages: b.messages.map(m => ({
        role: m.role,
        content: (m.content||'').toUpperCase()
    }))
}));

Problems

Run Custom JS

Rename File