CSV to JSON — The Other Direction
You've got a spreadsheet or CSV export and need to turn it into JSON for an API, a config file, or a database import. This tool handles the conversion automatically. It reads your header row as object keys, infers types (numbers stay numbers, booleans stay booleans), and gives you a clean JSON array.
Supports both comma and tab delimiters — just paste from Excel or Google Sheets and we'll figure it out. Quoted fields with embedded commas are handled correctly. Empty cells become null values, which is usually what you want for API payloads.
Smart Type Inference from CSV
CSV is inherently untyped — everything is a string. But when you're converting to JSON, you usually want 42 to be a number, not the string "42". This tool checks each value: if it looks like a number, it becomes a JSON number.true and false become booleans. Empty cells becomenull. Everything else stays a string. This automatic type inference saves you from post-processing the output manually.
Pasting from Excel & Google Sheets
Select cells in Excel or Google Sheets, hit Ctrl+C, and paste here. Spreadsheets copy data as tab-separated values, and this tool detects tabs automatically. The first row becomes your JSON object keys, following rows become the array items. It's the fastest way to get spreadsheet data into JSON format without writing any code.
Handling Special Characters & Regional Formats
CSV files from different regions use different conventions. Some use semicolons instead of commas (common in European locales where commas are decimal separators). Quoted fields can contain the delimiter character, newlines, and double quotes (escaped as ""). This parser handles all standard CSV edge cases including multi-line quoted fields and mixed delimiter detection.
🧠 Smart Type Detection
Numbers, booleans, and nulls are automatically inferred from string values. No manual casting required.
📋 Spreadsheet Ready
Direct copy-paste from Excel, Google Sheets, and Numbers. Tab and comma delimiters auto-detected.
Common Use Cases
- API Testing: Convert test data from spreadsheets into JSON request bodies for Postman or curl.
- Database Seeding: Turn CSV exports into JSON arrays for MongoDB, Firebase, or CouchDB imports.
- Configuration Files: Convert a spreadsheet of environment settings into a JSON config file.
- Data Pipelines: Transform CSV logs into structured JSON for Elasticsearch, Splunk, or Datadog.
Related JSON Tools
After converting, format the JSON output for readability. Need to convert back? Use JSON to CSV. Generate TypeScript interfaces from the result.