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CSV and JSON Converter

Last updated: April 2026

Convert flat CSV, TSV, TXT, and JSON data between table and JSON formats, with output that is easier to review, reuse, and move into other tools.

Tip: JSON input should be an array of flat objects for the cleanest conversion.
1

Upload a data file

Drop your CSV, TSV, TXT, or JSON file here or click to browse
Maximum file size: 25MB
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2

Choose conversion settings

3

Convert

Please upload a file first.

You might also need

You might also need

XML to CSV or Excel Convert XML records into CSV or Excel-compatible output with flattened fields, making structured data easier to review in spreadsheet-style columns. JSON and XML Beautifier Validate and format JSON or XML files, then convert them to JSON, XML, or CSV output when you need cleaner structure for review or reuse later. CSV Cleaner Clean CSV, TSV, and delimited files by trimming whitespace, removing duplicate rows, and fixing delimiters before you export a cleaner sheet or import file.

Converting between CSV and JSON is a common step in data workflows where a spreadsheet-based data source needs to feed into a web application or API, or where JSON data from an API response needs to be analyzed in a spreadsheet. This tool converts in both directions: CSV to JSON and JSON to CSV.

When converting CSV to JSON, each row in the spreadsheet becomes one JSON object in an array, with column headers as the keys. This is the standard structure expected by most web APIs and JavaScript applications. The output is a clean, indented JSON array ready for use in code or as an API payload.

When converting JSON to CSV, each object in the JSON array becomes one row, and all keys become column headers. This works best with flat JSON arrays - arrays of objects at a consistent depth. Deeply nested JSON where objects contain arrays of sub-objects may require manual review after conversion, as nesting cannot always be fully represented in a flat table.

TSV and pipe-delimited files are also accepted as input in addition to standard comma-separated CSV. Set the input delimiter before uploading if your file uses a non-comma separator.

What to Expect

Convert flat spreadsheet-style data and JSON arrays in either direction for API payloads, imports, exports, and analysis workflows.

Browse Data Cleanup Tools

Best for

  • Converting a spreadsheet export to JSON for use in a web application.
  • Turning a JSON API response into a CSV for analysis in Excel.
  • Preparing a flat data file for import into a JSON-based database.
  • Converting a product catalogue from CSV to JSON for an e-commerce API.
  • Checking and transforming data format during API integration development.

Not ideal for

  • Deep ETL pipelines, database joins, or schema-heavy data engineering jobs.
  • Nested source files that need custom mapping or transformation logic.
  • Highly sensitive data that should stay inside internal enterprise systems only.

What this tool keeps

  • Useful rows, fields, and visible text needed for reporting or imports.
  • Common delimited or structured formats that open in spreadsheets and editors.
  • Simple settings that focus on cleanup rather than heavy transformation.

What may need cleanup

  • Nested records may still need column renaming or spreadsheet cleanup afterward.
  • Source files with inconsistent structure can create sparse columns.
  • Delimiter and encoding issues may need one extra check before import.

Common errors

  • Uploading the wrong delimiter type or an unsupported source file.
  • Expecting deeply nested data to map perfectly without cleanup.
  • Using malformed XML or JSON that needs validation first.

Example use cases

  • Preparing exports for finance, ops, stock lists, or admin reporting.
  • Cleaning text files before summaries or spreadsheet imports.
  • Flattening XML feeds into rows that are easier to work with.

Sample input

A CSV export, XML feed, JSON file, log file, or messy text list.

Sample output

Cleaner rows, flatter columns, or a simpler spreadsheet-friendly export.

Who this is for

  • Admins, analysts, ecommerce teams, support teams, and spreadsheet-heavy roles.

Related guides

CSV and JSON Converter FAQ and Quick Checklist

Frequently Asked Questions

What can this converter turn into JSON or CSV?

It converts flat CSV, TSV, TXT, and JSON files between delimited table format and JSON array output.

What JSON structure works best?

The cleanest input is an array of flat objects where each object uses the same set of keys.

Can it detect the incoming delimiter automatically?

Yes. Auto mode tries common delimiters such as comma, semicolon, tab, and pipe, or you can force one manually.

What does Treat first row as header do?

When enabled, the first row becomes field names for JSON output or is preserved as the header row when exporting to CSV or TSV.

Can I export TSV instead of standard CSV?

Yes. Choose CSV or TSV style output using the output delimiter selector.

Are converted files stored after download?

No. Files are processed temporarily to generate your output, then deleted automatically. Tiny File Tools does not require signup for these tools.