Free developer tools
Everyday tools for web developers: test regular expressions, minify JavaScript, CSS and HTML, format SQL, explain cron schedules, and look up HTTP status codes.
11 tools, all free with no sign-up.
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Regex tester New
Test a regular expression against your text, with matches and capture groups highlighted live.
In your browser -
HTML minifier
Remove comments and collapse whitespace in HTML.
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CSS minifier
Remove comments and unnecessary whitespace from CSS.
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JavaScript minifier New
Minify JavaScript onto one line with Terser: strips comments and spaces, shortens local names and simplifies code.
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SQL beautifier
Format SQL so each clause starts on its own line.
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Markdown to HTML
Convert Markdown (GitHub-flavoured) to HTML.
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BBCode to HTML
Convert forum BBCode ([b], [url], [img]…) to HTML.
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JSON to TypeScript New
Generate TypeScript interfaces from a sample JSON object.
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Cron expression parser New
Explain a cron schedule in plain English and list the next times it will run.
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Chmod calculator New
Work out Unix file permissions in octal and symbolic form by ticking boxes.
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HTTP status codes New
Look up what any HTTP status code means and when to use it.
In your browser