Convert, clean and prepare CSV, JSON and Excel files. No installs, no signup.
Validate, pretty-print, or minify JSON. Optional sort keys, choice of 2-space/4-space/tab indent.
Convert CSV text into a JSON array of objects. Auto-detects delimiter; handles headers, empty values.
Convert JSON arrays or objects into CSV. Optional flatten of nested keys; choice of delimiter.
Clean messy CSV: trim whitespace, drop empty rows and duplicates, normalise line endings, convert delimiter.
Convert .xlsx workbooks to CSV. Pick a single sheet or export all sheets as a ZIP.
Convert CSV text or files into Excel .xlsx workbooks. Optional auto-width columns and frozen header row.