Data Tools

Format and validate messy JSON, convert between JSON, CSV and Excel in any direction, and read spreadsheet rows as clean records. These tools run entirely in your browser, so your data is never uploaded anywhere — ideal for private or sensitive work. Everything is free, instant and unlimited.

JSON Formatter

Format, minify and validate JSON with clear error hints. Free online JSON formatter that runs entirely in your browser.

JSON to CSV

Convert a JSON array of objects into a clean CSV file. Free online JSON to CSV converter that runs in your browser.

CSV to JSON

Turn any CSV file into clean JSON records with correct types. Free online CSV to JSON converter that runs in your browser.

CSV to Excel

Open a CSV file as a real .xlsx workbook you can edit in Excel. Free online CSV to Excel converter that runs in your browser.

Excel to CSV

Extract the first sheet of an Excel workbook as a plain CSV file. Free online Excel to CSV converter that runs in your browser.

Excel to JSON

Read spreadsheet rows from XLSX or XLS files as JSON objects. Free online Excel to JSON converter that runs in your browser.

JSON to Excel

Turn JSON records into a downloadable .xlsx spreadsheet. Free online JSON to Excel converter that runs in your browser.