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How do you convert CSV to JSON?

To convert CSV to JSON, paste or upload the CSV and it becomes an array of objects, using the first row as the keys for every following row. Conversion runs in your browser, so the data is never uploaded. Quoted fields containing commas are handled correctly.

Runs in your browser. Your files and text never leave your device - nothing is uploaded.

Why use CSV to JSON?

CSV to JSON is a focused, browser-based converter that reads comma-separated text and produces a JSON array of objects. The first line of your input acts as the header row: its fields, split on commas, become the property names used for every record below. Each subsequent line is turned into one object, pairing your header keys with the values from that row. Before mapping, the tool trims surrounding whitespace and strips a single pair of wrapping double quotes from both keys and values, so lightly quoted exports still come out clean. The interface is deliberately simple. You paste into a textarea labeled CSV Input, then press Convert to JSON. The Convert to JSON button stays disabled until you have entered something, and if the input cannot be parsed you get a visible conversion error message rather than a blank result. Successful output appears in a read-only area formatted with 2-space indentation, alongside a Copy JSON button that writes it to your clipboard and a Clear button that empties both the input and the output so you can start fresh. Because the parser splits lines on plain commas, it is best suited to straightforward CSV where values do not contain embedded commas or multi-line fields. If a row is shorter than the header, the missing keys are filled with empty strings so every object keeps a consistent shape. All of this happens locally in your browser with no network request, which means your data is never uploaded and the tool works the same whether you are online or offline once the page has loaded.

Key benefits

Runs entirely in your browser with no upload to a server, so sensitive or internal CSV data stays on your device
Uses the first CSV row as object keys automatically, matching how most exported spreadsheets are structured
Outputs readable JSON with 2-space indentation instead of a single minified line
Trims surrounding whitespace and strips wrapping double quotes from each header and value
Shows a clear conversion error message instead of failing silently when the input cannot be parsed

Features

Header-driven mapping: line one supplies the keys for every generated object
Pretty-printed JSON output using JSON.stringify with 2-space indentation
Automatic trimming and removal of surrounding double quotes on keys and values
Missing trailing values fall back to an empty string so every object keeps a full set of keys
Copy JSON button that writes the result straight to your clipboard
Clear button that resets both the input textarea and the output at once

Popular use cases

A developer converting a quick spreadsheet export into a JSON array to seed test data or a mock API
A data analyst reshaping a small CSV table into JSON to paste into a config file or a script
A student or learner inspecting how column headers map to key-value objects in JSON
Someone drafting a JSON payload by hand who prefers to lay the fields out as CSV first

How to use CSV to JSON

1
Paste your CSV
Type or paste your comma-separated data into the CSV Input box. The first line is treated as the header row and becomes the JSON keys, so keep your column names there.
2
Convert to JSON
Click the Convert to JSON button. Each data row is mapped to an object keyed by your header names, and the result is printed as a JSON array with 2-space indentation.
3
Copy or clear
Use Copy JSON to send the output to your clipboard, or click Clear to empty both the input and output and start over with a new CSV.
4
Or upload a CSV file
Instead of pasting, use the upload area above the CSV Input box to drop or select a .csv or .txt file. The file's contents load into the box and convert to JSON automatically.

How do you convert CSV to JSON?

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