Screaming Frog Alternatives: Free Desktop, Cloud, and Open-Source Crawlers

The best free Screaming Frog alternative depends on your site: for a verified site under a few thousand pages, Ahrefs Webmaster Tools' free Site Audit is the strongest option; if you want a desktop crawler without limits or accounts, an open-source tool like LibreCrawl or SEOnaut does the job. Before switching, remember that Screaming Frog itself is free up to 500 URLs. Below, every option is grouped by type, with limits taken from the vendors' own pages.

Published: 2026-10-23 · 7 min read · Satelo

First: do you need an alternative at all?

Screaming Frog's SEO Spider has a free version. Its pricing page lists the free crawl limit as 500 URLs; the paid licence is $279 per year and removes that cap (the page notes the real maximum depends on your memory and storage). For a small blog or a local business site, 500 URLs often covers every page, image, and script worth checking.

People look for alternatives for four reasons:

• the site is bigger than 500 URLs and the licence isn't in the budget;
• they don't want to install desktop software, or their laptop struggles with large crawls;
• they want scheduled crawls and alerts without leaving a computer running;
• they prefer open-source software they can inspect, script, or self-host.

Each reason points to a different kind of tool, so the comparison below is grouped by type rather than ranked as one list.

The comparison at a glance

Limits checked on the vendors' pages on October 17, 2026. Free tiers change; check the linked page before you commit.

Cloud crawlers (free with an account)

Ahrefs Webmaster Tools: best free option for your own site

Ahrefs' free Webmaster Tools includes Site Audit for verified websites. The page states 5,000 crawl credits per verified project per month, and credits are spent only on HTML pages that return a 200 status, so redirects, broken URLs, and images don't eat the allowance. You can add an unlimited number of verified sites.

Good: runs in the cloud, scheduled crawls, issue explanations, plus a free backlink view of your own site. Limits: you must verify ownership, so you can't crawl a competitor or a site you're evaluating. If you're weighing Ahrefs' paid plans, our cheap Ahrefs alternatives roundup compares the options.

Semrush Site Audit on a free account

Semrush's Site Audit documentation states the limit without a subscription: 100 pages per month. That's enough to sanity-check a landing page site or the top of a blog, not to audit a real archive. More on what the free account does and doesn't include in free Semrush alternatives.

Bing Webmaster Tools Site Scan

Bing Webmaster Tools is free, and Bing describes Site Scan as a way to run technical SEO audits that detect broken links, duplicate tags, and missing metadata (Bing Webmaster Blog). It needs a verified site, and the scan quota is set by Bing rather than by a published number. Worth running alongside another crawler because you also get Bing's indexing data, which matters for Copilot and other assistants built on Bing.

Open-source crawlers (no license limits)

Open-source tools have no URL cap in the license. The practical limits are your machine, your patience, and how politely you crawl (set a delay; don't hammer someone's shared hosting).

LibreCrawl

LibreCrawl is an MIT-licensed desktop crawler written in Python that describes itself as an open-source alternative to Screaming Frog: crawl a site, analyze links, extract SEO data, export results. It was actively maintained at the time of writing. Best pick if you want the "desktop spider" workflow with no cap and no account.

SEOnaut

SEOnaut is an MIT-licensed SEO audit tool you self-host (it runs as a web app, typically via Docker). It crawls a site and groups problems into an issue report. Good for an agency or a developer who wants a shared, always-available crawler without per-seat pricing.

Greenflare

Greenflare is a GPL-3.0 Python crawler with a desktop interface. Its repository hasn't been updated since 2023, so treat it as a working tool for tinkering, not something to build a process on.

Classic and freemium desktop tools

Xenu's Link Sleuth

The veteran. Xenu is free and runs on Windows; the current version listed on its page dates from 2010. It does one thing well: finding broken links. It won't audit titles, canonicals, or structured data.

WebSite Auditor (SEO PowerSuite)

The WebSite Auditor page says a limited free version exists and that in-app reports are available in all versions, while exporting to CSV, PDF, or HTML belongs to the paid tier. Useful for a one-off audit you read on screen.

Sitebulb

Sitebulb offers a 14-day free trial with no credit card. It's known for visual, prioritized reports. Not a long-term free option, but a trial can cover a single migration or a client audit.

Which one should you use? A decision table

What to check in your first crawl

Whichever tool you pick, the first crawl of a small site should answer these questions, in this order:

1. Status codes: any 4xx or 5xx pages linked internally? Fix or redirect them.
2. Redirect chains: internal links pointing to redirects. Update the links to the final URL.
3. Indexability: pages with noindex, blocked by robots.txt, or canonicalized elsewhere. Is each one intentional?
4. Titles and descriptions: missing, duplicated, or truncated. Our SEO checklist for a new site has the target lengths.
5. Orphan and deep pages: pages more than three or four clicks from the homepage or with no internal links.
6. Outbound links: paid, partner, and affiliate links should carry rel="sponsored"; spot-check them with our sponsored link checker.

If the crawl looks clean but Google still isn't indexing pages, the problem is usually quality or demand, not crawlability; see crawled, currently not indexed.

A free stack for a growing site (illustrative)

For illustration, take a 1,800-page WordPress blog with no tool budget. No single free tool covers it, but three together do:

1. Weekly, automatic: verify the site in Ahrefs Webmaster Tools and schedule Site Audit. With credits spent only on 200-status HTML pages, an 1,800-page blog fits inside the monthly allowance with room for re-crawls after fixes.
2. Monthly, deep: run LibreCrawl locally over the full site, including images and scripts, and export the results to a spreadsheet. Sort by status code, then by inlinks, so the broken pages with the most internal links get fixed first.
3. Before any big change: crawl the 500 most important URLs (your sitemap's top sections) with Screaming Frog free in list mode, before and after a theme switch, plugin update, or migration, and compare the two exports.
4. Quarterly: run Bing Site Scan for a second opinion and to catch anything Bing specifically struggles with.

The pattern generalizes: one cloud tool for scheduled monitoring of your own site, one uncapped desktop tool for deep dives, and a capped tool only where its specific strengths matter.

Free crawlers vs a paid licence: when to pay

Free tools are enough until one of these becomes true: you crawl client sites every week, you need JavaScript rendering on a large site, you need crawl comparisons and scheduled exports without manual steps, or the time you spend stitching tools together costs more than a licence. At that point, compare the paid plans on the vendors' current pricing pages rather than on third-party lists, because prices and limits change often.

Crawl politely

A crawler can send hundreds of requests a minute. On cheap shared hosting, that can slow the site for real visitors. Set a crawl delay or limit concurrent threads, crawl off-peak, and when auditing a site you don't own, keep it gentle. Many hosts and firewalls block aggressive crawlers, which produces false "errors" in your report anyway.

What to do next

A crawler tells you what's broken on a site. It doesn't tell you how the site looks from the outside: authority, traffic signals, trust. For that, run the domain through Satelo's free Quality Score. In about 30 seconds you get a 0–100 score built mostly from open data, with the evidence behind each number, for your own site or any site you're evaluating.

FAQ

Is there a free version of Screaming Frog?

Yes. Screaming Frog's pricing page lists the free version's crawl limit as 500 URLs. A paid licence removes the cap.

What is the best free alternative to Screaming Frog?

For your own verified site, Ahrefs Webmaster Tools' Site Audit (5,000 crawl credits per project per month). For any site without limits, an open-source crawler such as LibreCrawl.

Is there an open-source Screaming Frog alternative?

Yes: LibreCrawl (MIT, desktop), SEOnaut (MIT, self-hosted web app), and Greenflare (GPL-3.0, desktop, not updated since 2023).

Can I crawl a competitor's site with free tools?

Cloud tools like Ahrefs Webmaster Tools and Bing Site Scan require ownership verification. Desktop crawlers such as Screaming Frog free or LibreCrawl can crawl any public site; crawl politely.

Does Semrush have a free site audit?

Yes, with a free account. Semrush's documentation states a limit of 100 pages per month without a subscription.

Is Xenu's Link Sleuth still usable?

It still works on Windows for broken-link checks, but the current listed version dates from 2010 and it doesn't audit on-page SEO.

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