Data & Conversion Tools
Move lists and tables between CSV, JSON, columns and delimiters. 3 free tools - every one runs entirely in your browser, nothing you paste in or upload ever leaves your device.
Tools for moving data between the formats spreadsheets, APIs, and databases actually expect - a column of values into a delimited list, CSV into JSON and back, and a timestamp into a readable date in whichever timezone you need.
New Line to CSV
Convert a column of lines into a comma separated list, or split a delimited list back into one item per line.
CSV to JSON
Turn a CSV or TSV table into JSON records, or flatten JSON back into a spreadsheet-ready table.
Timestamp Converter
Convert Unix epoch timestamps to readable dates and back, in local time or UTC.
Choosing the right tool
New Line to CSV is for reshaping a single column into a delimited row, or the reverse. CSV to JSON is for structural conversion between tabular and nested data. Timestamp Converter is unrelated to the other two structurally, but shares the same audience: anyone prepping a data feed or debugging an API payload.
Common use cases
- Turning a spreadsheet column of IDs into a SQL IN (...) list
- Converting a CSV product export into JSON for an API call
- Converting a Unix timestamp from a log line or webhook payload into a readable date
Data & Conversion FAQ
Can these handle nested JSON, not just flat tables?
CSV to JSON flattens nested objects on the CSV-to-JSON direction and handles one level of nesting on the JSON-to-CSV direction - deeply nested structures are easier to reason about with JSON Formatter first.
Does Timestamp Converter handle milliseconds as well as seconds?
Yes - it detects whether a pasted value is in seconds or milliseconds from its magnitude, so you don't need to specify which.