A Free Screaming Frog Alternative for Internal Linking (No Install)

Screaming Frog’s SEO Spider is a genuinely great tool — a fixture of technical SEO for a reason. But it isn’t always the right tool for the job in front of you. It’s a desktop application you download and install, the free version stops at 500 URLs per crawl, and the full feature set sits behind an annual per-user licence. If what you actually need is a quick, clear read on your internal-link structure — not the entire technical-SEO kitchen sink — that’s a lot of setup for one answer. Here’s an honest look at a lighter alternative, and when each one is the right call.

What Screaming Frog is great at (and what it costs you)

Screaming Frog crawls your site like a search engine and surfaces hundreds of technical issues: broken links, redirects and redirect chains, duplicate content, missing or duplicated metadata, image and alt-text problems, XML sitemap generation, and much more. For a full technical audit, it’s hard to beat. The trade-offs are real, though: it’s a desktop install (Windows, macOS, or Linux), the free tier caps at 500 URLs per crawl and locks saved crawls, configuration, and integrations, and removing those limits means an annual per-user licence (around £199 / $259 at the time of writing). For an agency running deep audits daily, that’s easily worth it. For someone who just wants to know whether their internal linking is holding their pages back, it’s a lot of weight.

The lighter alternative: a browser-based internal-linking grader

Crawlmouse takes the opposite approach. You paste a URL and it crawls the live site in the browser — nothing to download, no licence, no per-seat cost, works on any device including your phone. It maps the internal-link graph and returns a single A–F grade plus the specific problems behind it: orphan pages, pages buried too deep, weak hubs, and thin anchor text. Where the desktop crawler hands you a dense spreadsheet to interpret, a grader hands you a verdict and a prioritised list. For the internal-linking question, that’s often all you need — and you have it in under two minutes.

There’s one more difference that matters in 2026. A browser grader that reads the static HTML your server returns is showing you the exact site a non-rendering AI crawler — the bots behind ChatGPT, Claude, and Perplexity — actually sees. Links that only appear after JavaScript runs are invisible to those crawlers, and a static-HTML grade catches them.

Where an internal-linking grader stops (the honest limits)

A focused tool is focused. Crawlmouse won’t give you Screaming Frog’s full technical sweep — it isn’t a broken-link auditor, a metadata checker, a redirect mapper, or an image-optimisation report, and it won’t replace the Spider for a comprehensive site audit. It does one thing: audit and grade internal-link structure, well and for free. If you need the whole technical picture, use Screaming Frog (or run both). If the internal linking is what you’re chasing, the focused tool gets you there faster.

Which should you use?

• Reach for Screaming Frog when you need a deep, all-in-one technical audit, you crawl large sites regularly, or you want redirects, metadata, and duplicate-content checks in one desktop tool — and you’re fine installing software and paying for the licence.
• Reach for a free browser grader when you specifically want to check your internal linking, you want a plain grade rather than a raw export, you’re on a phone or a locked-down work machine, or you just want the answer now without an install or a licence.

They’re not really competitors so much as different-sized tools for different jobs. The best move is often to start with the free grade to see whether internal linking is even your problem — and reach for the heavier crawler only if the audit tells you to.