Convert CSV files and pasted data to clean JSON instantly. Free online CSV to JSON converter with header detection, custom delimiters, and type parsing.
The Tooloogle CSV to JSON Converter turns spreadsheet exports, database dumps, and pasted CSV data into clean, structured JSON ready for APIs, JavaScript apps, and config files. Header detection, type parsing, and custom delimiter support handle the awkward edge cases automatically.
Header row detection — first row becomes object keys; toggle off for arrays-of-arrays output.
Custom delimiter — comma, semicolon, tab, pipe, or any character (handy for European exports using ;).
Quote & escape handling — properly parses values containing commas, quotes, and newlines.
Type inference — optionally parse numbers, booleans, and nulls instead of leaving everything as strings.
Preview — live JSON output as you tweak settings.
Pretty / minified output — toggle indentation for readability or production payloads.
File upload — drag and drop a .csv file directly.
Paste CSV data or drop a .csv file.
Confirm the delimiter and header settings (auto-detected for most cases).
Toggle type parsing if you want numbers as numbers and booleans as booleans.
Copy the JSON output or download as a .json file.
Importing spreadsheet data into a JavaScript app or REST API. Seeding test databases from sample data files. Converting Excel exports to API request bodies. Migrating data between systems with different format requirements. Preparing fixtures for end-to-end tests.
Quote any field containing commas, quotes, or newlines — otherwise CSV parsers split on the wrong character.
For numbers with leading zeros (postcodes, phone numbers, IDs), disable type inference so they stay as strings.
UTF-8 with BOM is auto-handled, but if you see weird characters, re-export as UTF-8 from your spreadsheet app.
Conversion happens entirely in your browser. CSV data — which often contains customer records, financial figures, or internal lists — is never uploaded or logged.
How to Use CSV to JSON Converter - Transform CSV Data Online
Enter or paste the content you want to process using the csv to json converter - transform csv data online.
Adjust any available settings or options to customize the output.
View, copy, or download your processed results instantly.
Convert CSV files and pasted data to clean JSON instantly. Free online CSV to JSON converter with header detection, custom delimiters, and type parsing.
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