Encode, decode, parse, and build URLs locally in your browser.

encodeURI / encodeURIComponent with selection-aware encode and decode.

Sort params, lowercase host, drop default ports, merge slashes, and more.

Convert Unicode domains to xn-- punycode and back (batch).

Assemble protocol, host, path, query, and hash into a full URL.

Build campaign links with utm_* fields, templates, and strip helpers.

Generate a local QR code for any URL and download PNG or SVG.

Render many URLs from a CSV file and a column placeholder template.

Build test URL lists from templates and dictionaries (zip or cartesian).

Compose Slack, Discord, Teams, Feishu and more webhook URLs.

Build curl and fetch snippets with Referer and User-Agent presets.

Break a URL into parts and edit query params with live rewrite.

Edit query strings, strip trackers, sort, dedupe, import/export.

Check absolute vs relative URLs and get readable validation errors.

Encode, decode, or extract host/path/params from many URLs at once.

Parse and edit SPA hash query strings like #?a=1 or #/path?x=1.

Diff two URLs by host, path, query, and hash with param change highlights.

Pull URLs from plain text, Markdown, or HTML and export the list.

Resolve relative paths against a base URL like the browser does.

Follow HTTP redirects via optional proxy and detect loops.

Parse sitemap.xml locally into loc lists (urlset or index).

Check Allow/Disallow rules against a URL and user-agent.

Keep or drop URLs by host, path, params, or regex.

Visualize URL path hierarchy as a foldable tree; export Mermaid or JSON.

Parse CSP violation JSON into blocked-uri lists and CSV/JSON exports.

Batch HEAD/GET status checks via optional proxy with rate limits.

Fetch a page via proxy and compare its canonical link to the input URL.