Checkbot

Checkbot is a Chrome extension that checks websites for SEO, speed, and security issues using more than 50 best-practice checks. It can crawl pages for broken links, duplicate content, invalid HTML, and insecure forms, and show site structure details such as linked pages, images, scripts, stylesheets, non-indexable pages, and redirects. Crawls can cover staging and local development sites, password-protected pages, and sites on private networks. Checkbot says crawling and other functionality run locally on the user's machine rather than as a web service. The free Basic plan allows 100 URLs per crawl, unlimited crawls, and unlimited sites, and is ad supported. Professional allows 10,000 URLs per crawl and adds localhost crawling, PDF summary reports, CSV and bulk export, and HTTP Auth password support. The Professional yearly plan is $10 a year, billed $120 per year; the monthly plan is $15 a month. Checkbot runs on Windows, macOS, Chrome OS, and Linux. It does not currently execute JavaScript during crawls. A subscription is for one individual, works on that user's devices, and can be cancelled at any time.

Checkbot offers local website crawling, with a free tier for smaller URL counts and Professional options for larger crawls and exports. Its lack of JavaScript execution is important to consider when choosing it for site audits.

Checkbot may suit people auditing websites across development, staging, or live environments. It is available on Windows, macOS, Chrome OS, and Linux.

Checkbot is a locally run Chrome extension for auditing websites, aimed at solo owners, developers, and small teams that need technical checks on public or private sites. Its broad crawl coverage and staging support are valuable, but JavaScript-dependent sites will need another tool or a companion audit.

Overview

Checkbot runs more than 50 best-practice checks across SEO, speed, and security. A crawl can expose broken links, duplicate content, invalid HTML, and insecure forms while also showing linked pages, images, JavaScript and CSS files, redirects, and pages blocked from indexing. This makes it useful for understanding site structure as well as collecting individual issues.

Crawling and related processing stay on the user's computer rather than a hosted web service. The extension can reach staging environments, localhost, password-protected pages, and private networks, which gives developers a practical pre-launch audit path. Checkbot does not execute JavaScript during crawls, however, so content or links rendered only after scripts run may not be discovered.

Key features

Audits and crawl controls

Checkbot combines on-page checks with a structural crawl. That breadth suits a first technical review of a site, especially when you need redirects, non-indexable pages, and asset relationships in the same report as SEO and security findings.

The 100-URL Basic limit is manageable for a small brochure site or a focused section, but it can force multiple crawls on a larger property. Professional raises the ceiling to 10,000 URLs and adds rules to skip URLs by pattern or type, making recurring audits more controllable. Both tiers permit unlimited crawls and unlimited sites, so the per-crawl ceiling—not a monthly crawl allowance—is the principal capacity constraint.

Private-site access and reporting

Local processing and support for HTTP-authenticated pages make Checkbot suitable for sites that cannot be exposed to a third-party crawler. Professional adds PDF summary reports plus CSV and bulk export, useful when findings must be shared or moved into another workflow. Extension analytics and crash reporting are opt-in; Checkbot says it does not track crawled URLs or personally identifiable information through that usage tracking.

Pricing

Basic — $0.00, free: 100 URLs per crawl, unlimited crawls, unlimited sites, and advertising. It is the sensible starting point for small sites and occasional checks, but the crawl cap and ads reduce its usefulness for larger audits.

Professional — Yearly plan — $10.00 per year, billed $120 per year (saves 33%): 10,000 URLs per crawl, unlimited crawls and sites, ad-free use, localhost crawling, PDF summaries, CSV and bulk export, HTTP Auth password support, URL-skip rules, and one user on unlimited devices. The annual price is the better fit for regular audits when you can commit for the year.

Professional — Monthly plan — $15.00 per month, billed once every month: It includes the same 10,000-URL limit and Professional features without an annual commitment. Choose it for short projects or variable workloads; ongoing use costs more than the yearly option. A subscription is for one individual, works across that person's devices, and can be cancelled at any time.

Platforms

Checkbot is a Chrome extension on Windows, macOS, Chrome OS, and Linux. Its extension format keeps audits close to the browser and local machine, but it is not presented as a standalone web crawler service.

Who it's for

Choose Checkbot for solo site owners, developers, and agencies auditing staging, localhost, authenticated, or private-network sites. Basic fits small properties and targeted checks; Professional fits larger sites and anyone who needs exports or shareable summaries. It is not the right primary crawler for applications whose important pages or links appear only after JavaScript executes.

Pros and cons

• Pros: More than 50 SEO, speed, and security checks in one crawl; local access to staging, localhost, authenticated, and private sites; unlimited crawls and sites on both tiers; Professional exports, PDF reports, and crawl-filter rules.
• Cons: Basic stops at 100 URLs per crawl and includes ads; Professional is single-user; JavaScript is not executed, which can leave script-rendered content unaudited.

Alternatives

Lighthouse is the better pick for an open-source, free audit tool with API, extension, web, Windows, macOS, and Linux access.

Website Crawler suits users who prefer a web or API service with a 10-pages-per-day free tier and paid monthly page quotas.

A1 Website Analyzer is a Windows and macOS option with a 30-day evaluation and a free mode capped at 500 page URLs per website.

CrawlCenter is a web-based alternative with a free basic project and 50 URLs per project.

CrawlRaven is a freemium API, extension, and web product focused on website and Google Search Console insights.

Geolify is a freemium API and web option built around brand audits and prompt monitoring.

Netpeak Spider is a Windows and macOS crawler with a free 500-URL plan and a trial-based paid offering.

Screaming Frog SEO Spider is a freemium API, Linux, macOS, and Windows crawler whose free version allows 500 URLs per crawl.

For a broader shortlist, see SEO Audit Software.

Verdict

Checkbot is a strong choice for individuals who want local, wide-ranging technical audits and need to inspect staging or private sites without sending crawls to a hosted service. Professional is the practical tier for sites beyond 100 URLs or workflows that require exports. Look elsewhere when JavaScript-rendered content is central to the audit, or when you need multi-user access rather than a single-user subscription.