SEO tools

About the SEO tools

SEO Tools

Technical SEO is mostly small, unglamorous checks — a missing hreflang tag, a robots.txt rule that accidentally blocks Googlebot, a title that gets cut off in search results, a batch of broken links nobody noticed. ToolsVale’s SEO tools cover exactly these checks: the things worth verifying before a site launch, after a migration, or as a regular audit, without needing an enterprise SEO subscription.

Most tools here run entirely in your browser. A couple — Broken Link Checker and Trailing Slash Checker — crawl your live site from a server, since checking hundreds of URLs isn’t something a browser can do on its own; any data from those crawls is deleted within 1 hour.

Tools in this category

Broken Link Checker

Crawls your whole site and finds every broken link, showing exactly which page each one sits on. Results appear live as the crawl runs, redirects are flagged separately from true 404s, and you can export everything to CSV. Runs server-side; crawl data is deleted within 1 hour.

hreflang Tag Generator

Generates correct hreflang tags for multilingual or multi-region sites, as either HTML link tags or an XML sitemap block, with built-in validation that catches the mistakes Google’s Search Console typically flags — like missing return tags or invalid language codes.

llms.txt Generator (New)

Builds a clean, spec-compliant llms.txt file — the curated file that tells AI systems like ChatGPT, Claude and Perplexity which of your pages matter most. Discovers your pages automatically, lets you keep the best ones, add descriptions, and export the finished file.

Robots.txt Generator

Builds a valid robots.txt with correct allow/disallow rules, crawl-delay settings and a sitemap line, with warnings for the mistakes that can accidentally block your entire site from Google.

Schema Markup Generator

Builds clean, valid Schema.org JSON-LD for rich results and AI answer engines, covering Article, Product, Local Business, FAQ, Event and other common types. Empty fields are dropped automatically so you don’t publish invalid or incomplete markup.

SERP Snippet Preview

Shows how your title and meta description will actually look on a Google search result, measured by real pixel width rather than character count, on both desktop and mobile. Nothing is uploaded.

Trailing Slash Checker

Crawls your site to find every URL that redirects only because of a missing or extra trailing slash, showing the exact page still linking to the old version rather than just the redirect itself. This kind of internal link waste is easy to miss and easy to fix once you see it listed.

URL Encoder Decoder

Encodes or decodes URLs and query string values, in Component, Full URL or Form mode, either one at a time or in batch. Decodes recursively when a value has been encoded more than once, and can break a URL down into its individual parameters. Runs entirely in your browser.

XML Sitemap Generator

Builds a valid XML sitemap either by automatically discovering your pages or by pasting in a URL list, with lastmod dates, priority values, and automatic splitting for sites with more than 50,000 URLs.

On-device vs. server-side processing

Most SEO tools here — hreflang, llms.txt, robots.txt, Schema, SERP Preview, Trailing Slash Checker, and URL Encoder — run entirely in your browser or work from URLs you provide directly, with no file upload involved.

Broken Link Checker needs to crawl your site from a server to check every internal and external link at scale. Crawl data is used only to generate your report and is automatically deleted within 1 hour. Full detail is in our how we handle files page.

Choosing the right tool

Common use cases

• Site migrations: running Broken Link Checker and Trailing Slash Checker before and after a domain or URL structure change to catch what broke.
• International sites: generating correct hreflang tags so Google serves the right language or region version to each visitor.
• Content publishers: previewing exactly how a new post’s title and meta description will appear before it goes live, instead of guessing at character counts.
• Developers: generating Schema markup for products, articles or FAQs without hand-writing JSON-LD or risking a syntax error.
• Anyone optimizing for AI search: building an llms.txt file so AI assistants have a clear, curated view of which pages to reference.
• New site launches: generating a robots.txt and XML sitemap correctly from day one, avoiding the classic mistake of accidentally blocking the whole site from indexing.

Tips for better results

• Always double-check a new robots.txt in Google Search Console’s robots tester before publishing — a single misplaced rule can deindex an entire site.
• Run Broken Link Checker on a schedule (monthly or after any content update), not just once — links break over time as other sites change.
• Validate hreflang tags after publishing; Google Search Console’s International Targeting report will confirm whether they’re being read correctly.
• Keep meta descriptions under the pixel width shown in SERP Snippet Preview rather than a fixed character count — pixel width is what Google actually truncates by.
• Re-generate your XML sitemap after any bulk content change, and resubmit it in Search Console so new or removed pages are picked up faster.

Frequently asked questions

Are my files or site data uploaded to a server?

Only for Broken Link Checker, which needs to crawl your site from a server to check links at scale. That crawl data is deleted automatically within 1 hour. Every other tool in this category runs entirely in your browser.

Do I need to know how to code to use these tools?

No. Each tool is built around a form or set of inputs — you don’t need to write JSON-LD, XML or regex by hand for any of them.

Will these tools work on a very large site?

XML Sitemap Generator automatically splits sitemaps for sites over 50,000 URLs, in line with the sitemap protocol’s limit. Broken Link Checker’s crawl speed depends on your site size; very large sites may take longer to complete.

What’s the difference between robots.txt and llms.txt?

robots.txt controls which pages traditional search engine crawlers (like Googlebot) can access. llms.txt is a newer, separate file that gives AI systems a curated summary of which pages matter most — it doesn’t block or allow crawling, it guides what AI tools reference.

Is there a limit on how many URLs I can check at once?

This depends on the specific tool; URL Encoder Decoder and hreflang Tag Generator support batch input, and any stated limits appear on the tool’s own page.

Are these SEO tools free to use?

Yes, all tools in this category are free to use with no account required.

How ToolsVale tools are different

Every seo tool listed here follows the same four rules — the same rules every tool on ToolsVale follows. You can verify each one yourself in under a minute.

Runs in your browser wherever possible

Most tools are on-device: they process your files locally using standard browser APIs. Your file never leaves your machine. Open your browser's Network tab while you use the tool — you will see zero uploads.

Explicit about server use

Some jobs genuinely need a server — fetching external URLs, running conversions that browsers cannot handle. Those tools carry a visible "server" badge on the tool page and a notice that says exactly what happens to your file and when it is deleted. No hidden uploads, no bait-and-switch.

No accounts, no daily quotas

Free means free. No sign-up wall, no watermarked outputs, no "3 conversions per day" gate. You can use every tool as many times as you need without giving us anything.

One tool, one job

Each tool does one specific job well instead of bundling twenty features into a heavy converter. That means faster pages, clearer results, and less accidental configuration mistakes.

Frequently asked questions about seo tools

How accurate are the SEO tools compared to paid tools like Ahrefs or Semrush?

The SEO tools focus on on-page and technical checks — meta tags, structured data, indexability, crawler behaviour — which are directly verifiable from the page itself. For keyword research, backlink data, and rank tracking, paid tools with their own crawler infrastructure remain the right choice.

Are the seo tools on ToolsVale really free?

Yes. Every tool in the seo category is free to use with no signup, no watermark, and no daily limit. We do not sell your data or run trackers on the tool pages — you can verify this by opening your browser's Network tab while you use any tool.

Do I have to upload my files to use these seo tools?

Most tools on ToolsVale run entirely in your browser — your file never leaves your device. Each tool page shows an "on-device" or "server" badge so you know before you start. Server tools are only used when the operation genuinely requires it, and files are deleted within one hour.

Is there a file size or count limit?

On-device tools are limited only by your browser's memory — typically several GB. Server tools cap uploads at a size shown on the tool page. There are no daily limits, no accounts, and no queue.

Will you keep my files or the results?

No. On-device tools never see your files at all — everything happens in your browser. Server tools hold files only long enough to process them and delete them within one hour. We do not log file contents, results, or personal data.

Do I need to create an account?

No account required for any tool. You can use every tool on ToolsVale without signing up. Sign-in only exists so you can leave comments on tools if you want to.