Web Tools
Explore free online developer tools in this category—formatters, converters, generators, and more. Open any card to use the tool in your browser.
15 tools available
- URL Encoder OnlineFree online URL encoder that percent-escapes query values and path segments for safe linking.
- URL Decoder OnlineFree online URL decoder that reveals original characters behind percent-encoding for debugging links.
- HTML Formatter OnlineFree online HTML formatter that indents markup for readable templates and easier debugging.
- HTML Minifier OnlineFree online HTML minifier that trims whitespace to reduce page weight—verify layout after minifying.
- CSS Minifier OnlineFree online CSS minifier that removes comments and excess spacing for leaner stylesheets.
- JavaScript Minifier OnlineFree online JavaScript minifier that compacts scripts for smaller bundles during quick experiments.
- MIME Type Lookup OnlineFree online MIME detector that maps filenames and hints to Content-Type values for HTTP responses.
- HTTP Header Parser OnlineFree online developer tool that splits raw HTTP headers into key/value pairs for proxy debugging.
- URL Structure Validator OnlineFree online URL validator that confirms schemes, hosts, and parsing rules for user-submitted links.
- URL Component Parser OnlineFree online URL parser that breaks links into protocol, host, path, query, and hash for routing work.
- URL Query String Builder OnlineFree online query builder that URL-encodes keys and values to assemble safe search strings.
- HTML Entity Encoder OnlineFree online HTML entity encoder that escapes markup characters before rendering untrusted text.
- HTML Entity Decoder OnlineFree online HTML entity decoder that converts &-style sequences back to readable characters.
- robots.txt Generator OnlineFree online robots.txt builder that drafts crawl rules and sitemap hints for SEO maintenance.
- XML Sitemap Fragment Generator OnlineFree online SEO helper that turns path lists into sitemap <url> snippets for static sites.