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.
Convert CSV text into tab-separated values (TSV). Auto-detects the delimiter.
Convert tab-separated values (TSV) into CSV, quoting any values that contain commas.
Convert CSV text into a Markdown table, ready to paste into README files, issues, or docs.
Convert a JSON array of objects into an Excel .xlsx workbook, one column per key.
Convert an Excel .xlsx workbook into JSON. The first row of each sheet becomes the object keys.
Convert .xlsx sheets into Markdown tables, ready for READMEs, wikis, and LLM prompts.