CSV to JSON Converter

Parse CSV files and convert them into formatted JSON arrays. Free and fast browser-based tool.

Input

Upload File

Output

Frequently Asked Questions

How does CSV to JSON conversion work?

The tool reads your CSV data, uses the first row as JSON keys (field names), and converts each subsequent row into a JSON object. The output is a properly formatted JSON array that can be directly used in API requests, database imports, or JavaScript applications.

Who uses this tool professionally?

Frontend developers convert spreadsheet data exports into JSON for web application consumption. Data scientists convert CSV datasets into JSON for NoSQL database imports. DevOps engineers convert CSV configuration files into JSON format for cloud deployment configurations.

Does it handle special characters and commas in fields?

Yes. The parser correctly handles quoted fields containing commas, newlines, and special characters following RFC 4180 CSV standards. Double-quoted fields are properly unescaped during conversion.

Is my data kept private?

Yes. All conversion happens locally in your browser. CSV data is never uploaded to any server.

CSV to JSON Converter

Parse CSV files and convert them into formatted JSON arrays. Free and fast browser-based tool.

Key Capabilities

Automatic header row detection

The converter detects whether your CSV has a header row and uses column names as JSON keys automatically.

Data type inference

Numeric values are converted to JSON numbers rather than being left as quoted strings.

Handles various delimiters and quote styles

Supports comma, semicolon, tab, and pipe-delimited files with proper quote handling.

How to Use

Upload or paste your CSV

Either upload a .csv file or paste CSV content into the text input.

Configure header and type options

Confirm whether the first row is a header row. Enable or disable numeric type inference.

Convert and copy the JSON

Click Convert to JSON. Copy the output or download as a .json file.

Common Use Cases

Data engineers converting spreadsheet exportsA data engineer can convert CSV exports to JSON for REST API ingestion.
Frontend developers loading fixture dataA frontend developer can convert CSV fixture data maintained in Excel to JSON for their application.
Analysts sharing datasets with technical teamsA business analyst can export from Excel as CSV and convert to JSON for developer consumption.

Frequently Asked Questions

How does CSV to JSON conversion work?

Who uses this tool professionally?

Does it handle special characters and commas in fields?

Yes. The parser correctly handles quoted fields containing commas, newlines, and special characters following RFC 4180 CSV standards. Double-quoted fields are properly unescaped during conversion.

Is my data kept private?

Yes. All conversion happens locally in your browser. CSV data is never uploaded to any server.

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Developer Utilities — Data Format Conversion and Encoding

Understanding Data Serialization Formats

Software developers frequently work with structured data formats like JSON (JavaScript Object Notation), CSV (Comma-Separated Values), XML (Extensible Markup Language), and YAML (YAML Ain't Markup Language). Each format has different strengths: JSON is the standard for web APIs and configuration files. CSV is universally supported by spreadsheet applications. XML is used in enterprise systems and document formats. YAML is popular for human-readable configuration. Our conversion tools transform data between these formats instantly, handling edge cases like nested objects, special characters, and encoding differences.

Cryptographic Hash Functions

Hash functions like MD5, SHA-1, SHA-256, and SHA-512 convert any input data into a fixed-length string of characters called a hash or digest. These functions are one-way — you cannot reverse-engineer the original input from the hash. They are used for password storage, data integrity verification, digital signatures, and file deduplication. SHA-256 is the current standard for security-sensitive applications. MD5 and SHA-1 are considered cryptographically broken for security purposes but are still useful for checksums and non-security applications. All our hash generators run entirely in your browser — your data is never transmitted.

Text Encoding and Character Sets

Computers store text as numbers. ASCII maps 128 characters (English letters, digits, basic punctuation) to numbers 0-127. Unicode extends this to over 140,000 characters covering virtually every writing system on Earth. UTF-8 is the dominant encoding on the web, using 1-4 bytes per character. Base64 encoding converts binary data (like images or files) into a text-safe format using 64 printable ASCII characters. URL encoding replaces special characters with percent-encoded equivalents for safe transmission in web addresses. Our encoding tools handle all these transformations with proper error handling for malformed input.

Privacy for Developer Tools

All DoctorDocs developer tools process your data entirely in your browser using JavaScript. No API calls, no server uploads, no telemetry. This is critically important for developers working with sensitive data — API keys, database connection strings, configuration secrets, or proprietary code. When you paste a JSON payload to format it, or generate a SHA-256 hash of a password, the data exists only in your browser's memory. Close the tab and it is gone. This makes DoctorDocs developer tools safe to use with production data and secrets.