How to Use curl to Send JSON Data in a POST Request?

If you’re dealing with large JSON files, you might wanna compress the data before sending. Use the `--compressed` flag with curl to handle gzip encoding.

```bash
curl -X POST -H "Content-Type: application/json" --compressed -d @largefile.json https://example.com/api
```

Also, check out https://jsonlint.com/ to validate your JSON before sending.