Client-Side Safe
JSON Formatter & Validator
Essential
Format, validate, prettify, and minify JSON with collapsible tree view and error highlighting.
Configurable indentation (2 spaces, 4 spaces, tabs).
Instant error pinpointing with exact line and column numbers.
Valid JSON
4 root properties • 335 bytesMore in developer utilities
Regex Tester & Matcher
Test regular expressions in real-time with match highlighting, capture groups, and flag controls (g, i, m, s, u).
Text & Code Diff Checker
Compare two blocks of text or code side-by-side or inline with visual addition and deletion highlights.
Markdown Live Editor
Live split-pane markdown editor with GitHub-flavored markdown rendering, syntax highlighting, and copy options.