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Convert CSV files to JSON arrays of objects instantly. Each row becomes a JSON object with header names as keys. All conversion runs locally in your browser.
Converting CSV to JSON is a common task when building REST APIs, feeding data into JavaScript applications, or working with tools and services that consume JSON. CSV is a flat tabular format, while JSON supports structured, nested data — but for flat tabular data, CSV converts directly to a JSON array of objects where each row becomes one object and each column header becomes a key.
JSON Viewer Pro's CSV to JSON converter reads the first row of your CSV as field names and converts each subsequent row into a JSON object. Numeric values that look like numbers are automatically parsed as JSON numbers rather than strings. Empty cells become null values in the JSON output. The result is a clean JSON array ready to use in any API, database, or JavaScript application.
All conversion runs locally in your browser — nothing is uploaded to any server. Paste your CSV or upload a file, click Convert in the Convert tab, and the JSON output appears immediately ready to copy or download as a .json file.
The first row of the CSV becomes the JSON object keys. Each subsequent row becomes a JSON object in an array.
Yes. Values that are valid numbers are converted to JSON numbers automatically. All other values remain as strings.
Empty cells are converted to empty strings or null depending on the context.
JSON Viewer Pro — all processing runs locally in your browser. Your data is never sent to any server. Free to use, no account required.Privacy Policy·Contact