CSV · JSON · CLEANUP / FREE TOOL

CSV to JSON Converter

Convert CSV rows into JSON objects with string-valued fields.

Your workspace

Free · local processing

Choose task Choose local file (.csv, .tsv, .json, .txt)

Max 3MB/file, up to 15 files. Inputs are not uploaded to a processing server.

Input text (CSV or JSON)

Delimiter

Deduplicate by column (optional)

Paste CSV or load a file. Column names become JSON object keys; cell values remain strings.

CSV-to-JSON preserves leading-zero identifiers as strings. CSV exports neutralize potentially dangerous spreadsheet formulas.

Are IDs such as 00123 preserved?

Yes. CSV values stay strings, so leading zeros are preserved.