Test & Debug
Inspect, compare, validate, and troubleshoot without leaving your browser. Every tool works locally and is free to use.
R
Regex Tester
Test regular expressions with live matches, flags, and capture groups.
Open tool →TText/Code Diff Checker
Compare two blocks line by line and inspect additions and removals.
Open tool →JJWT Decoder
Inspect JWT headers and payloads locally without verifying or transmitting them.
Open tool →JJSON Schema Validator
Validate a JSON document against a JSON Schema in your browser.
Open tool →DDuplicate Line Remover
Remove repeated lines while preserving their first appearance.
Open tool →SSort Lines
Sort text lines alphabetically or numerically.
Open tool →WWhitespace / Blank Line Remover
Trim stray whitespace and collapse repeated blank lines.
Open tool →