SEO Desk: On-Page SEO, Speed, Broken Links & Schema

SEO checks for the page you're on and the pages you write: tags, speed, links, schema, robots.txt, snippets and UTMs.

SEO checks for the page you’re on and the pages you write, in one window. Nine tools, one toolbar button, no account. Click SEO Desk on any page and pick a tool from the list: check the page’s SEO, measure its speed, find broken links, compare it with another version, or see what it’s built with. Then write better titles and descriptions, schema markup, robots.txt rules and campaign links, right next to your CMS in the side panel. PAGE CHECK: Title, description, headings, social tags, structured data and links, with plain-English fixes. • Title and meta description with estimated pixel widths and where search results cut them • Canonical, robots meta, hreflang, the heading outline (missing or extra H1s, skipped levels) and images without alt text • Open Graph and Twitter card tags with a preview of the shared card • Pro: structured data (JSON-LD) checks, every link with filters, a search result preview, Markdown and CSV reports, snapshots to compare after your changes SPEED: Core Web Vitals (LCP, CLS, INP), load timing and page weight, with the elements that caused them. • Largest Contentful Paint, Cumulative Layout Shift and Interaction to Next Paint, rated against Google’s thresholds • The element behind each one, LCP sub-parts, layout shift sources and the slowest interaction • Page weight by type and by this site versus other sites, the largest files, and plain-English fixes • Pro: reload and measure from a cold cache, outlines on the page, every file with CSV, history and before/after, an HTML report BROKEN LINKS: Broken links, redirects and missing #anchors on your own pages. • A broken link checker for your own pages: OK, redirected (with the final address), broken, timed out • Outline the broken links right on the page • Pro: images, scripts and stylesheets too, #anchor checks, a 50-page crawl of your site that follows robots.txt, CSV and HTML export COMPARE PAGES: Staging against live, or a page before and after a deploy: what changed in text, SEO tags, links, images and headings. • Set the staging page as A, open the live page and compare, or compare a page before and after a deploy • Changed text word by word, title, meta description, canonical, robots and JSON-LD, with warnings for noindex, test-server canonicals and lost tags • Pro: link, image and heading changes, ignore rules for dates and numbers, saved snapshots, Markdown, HTML and CSV export TECH STACK: Which CMS, frameworks, analytics and payment tools a site uses, read from the page itself. • The CMS, frameworks, analytics, tag managers, payment and hosting a site uses, read from the page itself • Confidence, versions and the signals that matched, for each technology • Pro: a history of sites you checked with notes, compare two sites, CSV, JSON and Markdown export, your own detection rules TITLES & DESCRIPTIONS: Write titles and meta descriptions for many pages, with pixel widths, a result preview and duplicate checks. • A SERP snippet editor for many pages: titles and meta descriptions with character counts and pixel widths • A result preview, keyword, length, duplicate and brand-suffix checks • Pro: unlimited pages and projects, CSV import and export that round-trips with spreadsheets and CMS imports, brand templates, find and replace, client reports SCHEMA MARKUP: Write JSON-LD structured data from forms, checked against Google’s documented requirements. • A JSON-LD schema markup generator: FAQ, Organization, Breadcrumbs and Article free; Product, Local business, Event, Recipe, Video, Job posting, Software app, Course, Person and How-to with Pro • Every field checked against Google’s documented requirements: required and recommended properties, dates, currencies, GTIN check digits • Pro: several items linked in one @graph, templates per site, bulk JSON-LD from a CSV, import existing markup to check and edit it ROBOTS.TXT: Test robots.txt rules: allowed or blocked for each address and crawler, with the deciding line explained. • A robots.txt tester for search and AI crawlers (RFC 9309, with Google’s documented extras) • Allowed or blocked for each address and crawler, with the deciding line explained, and a lint of the whole file • Pro: fetch the live robots.txt, every crawler as a matrix, which AI bots (GPTBot, ClaudeBot, CCBot, Google-Extended and more) are blocked, compare two versions, saved tests, CSV UTM LINKS: Tag the page you’re on with UTM parameters, keep naming consistent and get a QR code. • A UTM builder: tag the page you’re on with utm_source, utm_medium, utm_campaign, utm_term and utm_content • Naming rules keep your analytics clean (lowercase, no spaces), and a QR code for the link • Pro: unlimited presets, required fields and allowed values for your team, QR download as PNG or SVG, link history with CSV Private by design. SEO Desk reads a page only when you click its button on that page, and nothing about the pages you check is sent to us or anyone else: no account, no analytics, no lookup services. It reaches other sites only when you ask (checking links, fetching a robots.txt), and your browser asks you first, one site at a time. Installing it asks for no access to your sites at all. FREE • Page check: every finding, title and description pixel widths, the heading outline, social tags with the share card, link counts • Speed: all five metrics with their causes, load timing, page weight, the 5 largest files and every fix • Broken links: up to 100 links per page: OK, redirected, broken or timed out, outlined on the page • Compare pages: text and SEO tag changes with warnings (noindex appeared, a canonical pointing at a test server, lost description) • Tech stack: every technology found, by category, with versions and the signals that matched • Titles & descriptions: one project of 10 pages with every count, check and the preview • Schema markup: FAQ, Organization, Breadcrumbs and Article markup, checked and ready to copy • Robots.txt: 20 addresses and 3 crawlers at a time, explanations and the full lint • UTM links: build and copy links, custom parameters, 3 presets, naming rules and a QR code PRO, COMING SOON: ONE PAYMENT, NO SUBSCRIPTION ($29) • Page check: structured data checks, hreflang, the full link list with CSV, a search result preview, Markdown and CSV reports, snapshots to compare after changes • Speed: reload and measure (cold cache), outlines on the page, every file with CSV, history with before and after, an HTML report • Broken links: every link plus images, scripts and stylesheets, #anchor checks, a 50-page crawl of your site, CSV and HTML export, ignore patterns • Compare pages: link, image and heading changes, ignore rules, saved snapshots, Markdown, HTML and CSV export • Tech stack: history of sites you checked with notes, compare two sites, CSV, JSON and Markdown export, your own detection rules • Titles & descriptions: unlimited pages and projects, CSV import and export, brand suffix templates, find and replace, client reports • Schema markup: all 14 types, several items linked in one @graph, templates per site, bulk JSON-LD from CSV, import existing markup • Robots.txt: fetch the live robots.txt, unlimited addresses, every crawler as a matrix, the AI crawler view, compare two versions, saved tests, CSV • UTM links: unlimited presets, required fields and allowed values, QR download as PNG or SVG, link history with CSV, shared presets • One key for every tool, on up to 3 of your browsers Shortcut: Alt+Shift+S opens SEO Desk on the page you’re on. It also opens in the side panel or a full tab.