Free online data tools
Formatters and converters for structured data. Paste or drop a file; parsing stays in memory.
Popular
JSON to CSV
Convert JSON to CSV in your browser. Paste an array or object; nested keys are flattened. Data is not sent to a server.
CSV to JSON
Convert CSV to JSON in your browser. Paste or drop a file; choose headers and delimiter. Local only.
JSON ↔ YAML
Convert JSON ↔ YAML in the browser. Structure and indentation preserved. Config never uploaded.
All data tools
JSON to CSV
Convert JSON to CSV in your browser. Paste an array or object; nested keys are flattened. Data is not sent to a server.
CSV to JSON
Convert CSV to JSON in your browser. Paste or drop a file; choose headers and delimiter. Local only.
JSON ↔ YAML
Convert JSON ↔ YAML in the browser. Structure and indentation preserved. Config never uploaded.
CSV duplicate remover
Remove duplicate CSV rows by selected columns. Paste or drop; download cleaned CSV. Local only.
CSV column extractor
Keep only chosen CSV columns. Output a new CSV. Local only.
JSON minifier
Minify JSON in your browser by removing whitespace. Data is not sent to a server.
XML formatter
Format and indent XML in your browser using the native parser. No server communication.
CSV to Markdown
Turn CSV into a Markdown table in your browser. Processing stays local.
Why client-side data tools?
CSV and JSON exports frequently contain customer or production data. A local parser is the difference between a converter and an accidental leak.