A LITTLE ORDER, A LOT LESS WORK.
CSV to JSON
Preserve identifiers and original strings in structured JSON.
01 — 18Start with data. Make room for work.
Batch processing available
INPUT
COMPARE WITH
Results will appear here
ONE OPERATION, MULTIPLE FILES
Do repeated work in one pass.
Files use the options above. Up to 10 files, 2 MiB each.
Files stay on your device. Download each result independently.
No files selected.
All processing happens in this browser.
How to use it
- The first record supplies field names. All cells remain strings, including numbers with leading zeros.
- Supports comma, tab, semicolon and pipe separators. Choose a separator manually when detection is ambiguous.
- Duplicate or missing headers and inconsistent column counts stop conversion to prevent data loss.
Are numbers converted automatically?
No. Apply explicit type conversions in your downstream system.
Can I read legacy Chinese files?
Select GB18030 before opening the file. UTF-8 decoding is strict by default.