Delimiter.live
10 tools

SEO Tools

These SEO tools cover two jobs. On-page: measuring keyword density, counting words and characters against a target length, estimating reading time and generating clean URL slugs. Technical: tracing where a redirect chain actually ends and inspecting the response headers a page returns. The technical checks run on our server because a browser cannot read cross-origin headers.

Search and answer engines reward pages that are technically sound and genuinely useful, and both halves are measurable. On-page work means writing to a sensible length, avoiding the keyword repetition that reads badly to humans and to ranking systems, and producing URLs that stay readable.

Technical work means confirming that the things a crawler sees match what you intended: that a redirect resolves in one hop rather than four, that the canonical and robots headers say what you think, and that a page returns 200 rather than a soft 404.

On-page content

5 tools

Measure and shape the copy itself. These run in your browser.

Tags and crawl control

3 tools

Produce clean paths, correct head tags and a valid robots file.

Technical checks

2 tools

Inspect what a crawler actually receives. These run on our server.

What people use these for

  • Check an article for keyword repetition that reads as stuffing.
  • Trim a meta description to fit within the length search engines display.
  • Generate a clean slug from a headline containing punctuation and accents.
  • Confirm a migration's redirects resolve in one hop instead of a chain.
  • Verify that a page returns the canonical and robots headers you configured.
  • Estimate reading time to set expectations on a long-form article.

SEO Tools: frequently asked questions

Is there an ideal keyword density?
No, and any specific figure you see quoted is folklore. Modern ranking systems evaluate meaning rather than repetition counts. Density is useful in one direction only: as a warning that a term appears so often the copy reads badly. Treat a high number as an editing prompt, not a target to hit.
Why do the redirect and header checkers run on the server?
Browsers cannot read the headers of a cross-origin response or follow another site's redirect chain — the same-origin policy forbids it. Our server makes the request on your behalf and returns what it saw, which is why those two pages carry a server-side processing badge.
How long should a title or meta description be?
Search engines truncate on pixel width rather than character count, so there is no exact limit. As a working guide, titles around 50 to 60 characters and descriptions around 140 to 160 usually display in full. Write for a human first and check the length afterwards.
Do redirect chains actually hurt?
They cost crawl budget and add latency for every visitor, and each additional hop is another chance for something to break during a future migration. One hop from old URL to final destination is the goal; chains of three or more are worth fixing.
All tools →

Last reviewed 7 August 2026.