Data & Text
Format, validate, query and convert data and text — JSON, CSV, SQL, XML, YAML and more — with testers for regex, jq, XPath and live previews.
These tools run entirely in your browser. Open any of them in the app:
Regex Tester
Test regular expressions across five engines and see matches as you type.
jq Filter
Filter and transform JSON with a jq expression.
JSON Formatter
Prettify or minify JSON.
CSV to JSON
Convert CSV to JSON.
JSON to CSV
Convert JSON to CSV.
CSV Query
Query a CSV, JSON or Parquet file with SQL — drop the file, write SELECT, get a table.
Data Format Converter
Convert data files between CSV, TSV, JSON, NDJSON and Parquet with DuckDB.
SQL Formatter
Prettify or minify SQL, dialect-aware.
yq Filter
Filter and convert YAML, JSON, XML and TOML with yq.
Markdown Preview
Write Markdown and see a live, GitHub-flavoured preview.
JSON Validator
Check JSON for syntax errors.
XPath Tester
Run XPath queries against an XML document.