Free Technical SEO Tools for Developers & SEOs

Audit, monitor and fix critical SEO fundamentals — from HTTP status and robots.txt to JavaScript rendering, hreflang and indexing checks.

Check status codes, robots.txt blocks, rendering gaps, indexing issues & more

Our Tools

JavaScript Rendering Check

See what crawlers really see — raw HTML or full render

Avoid invisible content and lost indexing opportunities

Many crawlers only process the HTML source — not dynamic JS. If important content (text, links, meta tags) loads via JS, search engines (and AI crawlers) may never see it. Use this checker to reveal hidden content and fix rendering gaps.
JS Rendering Check

HTTP Status Code Checker

Check if your pages return the correct HTTP statuses

Why this matters for SEO & site health

Correct HTTP statuses ensure search engines and users land on valid, indexable pages. Spot 404s, 5xx server errors or broken redirect chains before they hurt crawlability or rankings. Perfect for link audits, migrations or routine checks.
HTTP Status Code Checker

Robots.txt Checker

Test whether pages are blocked from crawlers

Prevent accidental crawl & indexing blocks

One small robots.txt mistake can block entire site sections — hidden from view but deadly for SEO. Use this tool to validate your rules, catch unintended blocks, and safely test configuration changes before deploying them.
Robots.txt Checker

hreflang Testing Tool

Validate your multilingual setup with hreflang & canonical logic

Ensure correct international SEO & language targeting

A wrong hreflang setup can confuse search engines and cost you visibility. Use this tool to guarantee your multilingual content is properly linked and signals are clean — so users and search engines see the correct version.
hreflang Testing Tool

GSC Bulk Inspect Tool

Bulk-check indexing status for many URLs at once

Find indexing issues across many pages — quickly

Useful for large sites, migrations or audits: discover which pages are indexed, excluded, or have canonical/robots issues. Spot soft 404s, canonicalization problems or crawl anomalies — and get a full exportable overview.
GSC Bulk Inspect Tool

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SearchVIU prioritized SEO data allow you to get better and faster at:

SearchVIU ist the data turbo for your SEO activities and processes. And our clients think so too:

We work hard to make sure our clients have optimal SEO results for their website. Thats why we are happy when the companies, who work with us, can approve that it actually works.

We’ve been working with searchVIU for over a year, and their personal approach to SEO data is just what we have needed.
Just Amazing is a large international e-com business with teams of expert marketers, designers, writers, journalists, translators and editors. The comprehensive reports that Michael and Eoghan create allow us to deep dive into every aspect of our website, providing each of our teams with the guidance to ensure that our SEO strategy is rock-solid.
If we ever have a question or idea for changing our SEO strategy, the team at searchVIU are always on hand to offer excellent insight and advice.
Thanks to searchVIU, we have made substantial SEO changes that we would not have dared to do alone. The data that searchVIU provides has also helped us significantly improve our Core Web Vitals for several e-com projects and supported us in optimising many important SEO aspects like structured data, hreflang, or category pagination.

Nick Avé
General Manager, Just Amazing BV

„I’ve been happily using searchVIU since beta and it’s helped me do the work of a small team when it comes to large-scale SEO data collection and automation – an invaluable benefit to my business.
The platform and its DataStudio report connectors have helped with migrating, auditing and improving the organic performance of some highly complex international websites and it’s something I’m proud to have in my toolset as I strive to deliver only the very best results for my clients. The team (Michael and Eoghan) are always on hand to offer expert support in a friendly and timely manner and to talk me through the regular updates and feature improvements, for which I’m eternally grateful. searchVIU has revolutionized the provision of SEO data warehousing, cloud-based crawling and optimization opportunities and I can’t recommend it highly enough to anyone serious about investing in a simple solution to managing complicated workflows.

Luke Fitzgerald
Digital Marketing Consultant, RightFitz

„The searchVIU solutions have supported us optimally with a complex relaunch (changes of domain, protocol and contents) as well as after that with further optimizations.
Not only have I been convinced by the swift and straightforward processing, but even more so by the profound interpretation of the results and the resulting tips and instructions.
Definitely recommended!

Marco Roos
Verantwortlicher Web, daydreams.it

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