Klausus DevTools
Fast, private developer utilities that run entirely in your browser. No uploads, no tracking, no backend.
JSON & Data
- JSON Formatter & ValidatorFormat, validate and fix JSON against RFC 8259, RFC 7159, RFC 4627 or ECMA-404.
- Data ConverterConvert between JSON, YAML, XML, CSV and INI, with automatic format detection.
- JSON Query TesterTest JSONPath, JSONSelect and JSON Query expressions against your JSON.
- XPath TesterTest XPath 1.0 expressions against XML and see every matching node.
- CSV ⇄ Excel ConverterConvert CSV to XLSX or XLS, and Excel spreadsheets back to CSV.
Text
- Word & Character Counter Coming soonCount words, characters, lines and bytes of any text.
- Remove Duplicate Lines Coming soonFind and remove repeated lines, optionally ignoring case and whitespace.
- Case Converter Coming soonUPPERCASE, lowercase, Title Case, camelCase, snake_case and more.