Catalogus

Run a local accessibility checklist: images, headings, labels, and landmarks. Pro saves reports, export, and ExtHub sync.

Hover elements to inspect content, padding, border, and margin box sizes. Pro remembers this site, presets, and ExtHub sync.

Hide common cookie consent banners on the active page with local CSS rules. Pro remembers sites, saved presets, and ExtHub sync.

Serialize forms on the active page to JSON and copy or download the data. Pro saves snippets, extra format options, and ExtHub sync.

Format, minify, and validate JSON locally with path lookup. Pro saves snippets, extra format options, and ExtHub sync.

Debug page layout with depth outlines, flex/grid accents, and a configurable column overlay. Pro remembers this site, presets, an...

Scan page links for broken URLs — filters, concurrent checks, export, and on-page highlight. Pro saves reports, export, and ExtHu...

Click two points on the page to measure pixel distance, width, and height. Pro remembers this site, presets, and ExtHub sync.

Inspect CSS media queries on the page — match state, viewport, prefers-*, breakpoints, and export. Pro saves reports, export, and...

Extract frequent colors from computed styles on the active page. Pro saves reports, export, and ExtHub sync.

Trace redirect chains with hop timing, host/scheme change alerts, history, and JSON export. Pro saves snippets, extra format opti...

Local HTTP client with headers, auth, presets, timing, JSON pretty-print, and cURL export. Pro saves snippets, extra format optio...

Inspect meta robots, fetch robots.txt, list sitemaps, and test if a path is allowed for bots. Pro saves presets, history, and Ext...

Extract and inspect JSON-LD and microdata schema markup on the active page. Pro saves snippets, extra format options, and ExtHub...

Pick an element on the page and copy a unique CSS selector for it. Pro saves snippets, extra format options, and ExtHub sync.

Save and restore named tab sessions for the current window locally. Pro saves searches/presets and syncs via ExtHub.

Browse, edit, and delete localStorage and sessionStorage for the active page. Pro saves snippets, extra format options, and ExtHu...

Fuzzy-search open tabs across windows and jump to a match instantly. Pro saves searches/presets and syncs via ExtHub.

Estimate page transfer size from Performance resource timings on the active tab. Pro saves reports, export, and ExtHub sync.

Test XPath on the page — recipes, click-to-pick, scroll-to-match, saved queries, and copy paths. Pro saves snippets, extra format...

Calculate IPv4 network, mask, and host ranges from a CIDR locally. Pro saves presets, history, and ExtHub sync.

Parse Content-Security-Policy from page meta tags locally. Pro saves reports, export, and ExtHub sync.

Inspect title, canonical, robots, and hreflang on the current page. Pro saves reports, export, and ExtHub sync.

Convert Unix permission octals and rwx flags locally. Pro saves presets, history, and ExtHub sync.