Pro tip: Avoid online tools if your data’s sensitive. Use Python’s built-in `csv` module—it’s foolproof for csv to json format:
```python
import csv, json
data = []
with open('file.csv') as f:
for row in csv.DictReader(f):
data.append(row)
json.dump(data, open('file.json', 'w'))
```
Headers become keys automatically. Easy!
```python
import csv, json
data = []
with open('file.csv') as f:
for row in csv.DictReader(f):
data.append(row)
json.dump(data, open('file.json', 'w'))
```
Headers become keys automatically. Easy!