Developer
JSON, regex, formatters, minifiers and SEO configs. 12 free online tools, all running locally in your browser.
JSON FormatterFree online JSON formatter and minifier with 2/4 space or tab indentation. Syntax errors are reported with the exact line and column. Nothing is uploaded.
Regex TesterFree online regex tester: live match highlighting, capture groups, replace preview and g/i/m flags — all running locally in your browser.
Cron Expression ParserFree online cron parser: turn 'minute hour day month weekday' into plain English and list the next 5 run times. Supports */n steps, ranges and lists.
SQL Formatter & MinifierFree online SQL formatter and minifier: uppercase keywords, clause breaks, nesting indentation, or collapse everything to one line — string literals are never mangled.
Code Formatter & MinifierFree online code formatter: beautify or minify HTML, CSS and JavaScript in one click, with script and style contents preserved verbatim.
CSV ⇄ JSON ConverterFree online CSV ⇄ JSON converter: first row becomes the header, with quoted fields, escaped commas and embedded newlines supported, plus automatic number and boolean detection.
Meta Tag GeneratorFree online meta tag generator: enter a title, description, URL and image to get copy-paste ready title, description, canonical, Open Graph and Twitter Card tags, plus length recommendations.
chmod CalculatorConvert between octal, symbolic and ls -l notation; tick the permission bits and get the chmod command, with setuid / setgid / sticky support.
gitignore GeneratorTick your stack and OS, get a merged .gitignore in real time, sectioned by template and ready to download.
HTTP Status Code ReferenceLook up a code, search by keyword, or filter by 1xx–5xx — each entry lists the Chinese and English names plus the RFC that defines it.
YAML and JSON ConverterConvert YAML to JSON and back, with 2 or 4 space indentation, comments and nested structures supported.
XML FormatterBeautify XML indentation, minify whitespace, escape or unescape tag content, with live tag-pair validation.