Two new free developer tools just went live on at-use.com:
CSV to JSON Converter
Paste or upload a CSV file (up to 20 MB) and get JSON out in the format you actually need:
- Array of Objects - {"name":"Alice","age":30}
- Array of Arrays - [["Alice",30]]
- Keyed JSON - first column as key: {"Alice":{"age":30}}
- JSONLines/NDJSON - one object per line
Auto-detects delimiter (comma, tab, semicolon, pipe). Handles quoted fields, embedded newlines, unicode. Server-side PHP, nothing stored.
JSON to CSV Converter
Paste a JSON array and download a CSV:
- Supports Array of Objects, Array of Arrays, JSONLines
- Flattens nested objects to dot-notation columns (ddress.city)
- Custom delimiter, quote character, header row toggle
- Preview first 10 rows; full file available via download
Server-side, nothing stored.
Both tools are free, no sign-up required.
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