Paste JSON or CSV
Formatted result
Format & Convert
View & Validate
Output Actions

Features

  • Pretty Print – Format JSON with 2-space indentation for readability
  • Minify – Compress JSON by removing all whitespace
  • Validate – Check for syntax errors with line number reporting
  • Auto-Detect – Automatically identifies JSON vs CSV format
  • Copy & Download – Export your formatted data instantly
  • Privacy First – All processing happens in your browser, no data uploaded

How to Use

  1. Paste your JSON or CSV data into the input textarea
  2. Click Pretty Print to format with indentation
  3. Click Minify to compress and remove whitespace
  4. Click Validate to check for syntax errors
  5. Click Copy Output to copy the result to your clipboard
  6. Click Download to save as a .json or .csv file

Frequently Asked Questions

JSON (JavaScript Object Notation) is a lightweight data interchange format. It's easy for humans to read and write, and easy for machines to parse and generate. JSON is commonly used to transmit data between a server and web application.
CSV (Comma-Separated Values) is a simple file format used to store tabular data. Each line represents a row, and columns are separated by commas. CSV is widely used for exporting and importing data in spreadsheet applications.
Yes! All processing happens directly in your browser using JavaScript. Your data is never uploaded to any server. Once you close the page, your data is gone.
This tool can handle files up to 10MB. For larger files, consider using a desktop application or splitting your data into smaller chunks.
Common JSON errors include: missing commas between items, trailing commas after the last item, unquoted keys, single quotes instead of double quotes, and unclosed brackets or braces. The error message will show the approximate line number where the issue was detected.