Keyword placement

Check on-page SEO and view the distribution and saturation of keywords on the page. You will receive a score, checklist, and clear guidelines for optimizing your page for a specific keyword.

What does the Online On-page SEO Checker tool do?

The tool analyzes the keyword distribution in the HTML document. It focuses on elements key to SEO. It checks the occurrence of the phrase, among others, in the title tag, meta description, h1, and alt attributes for images. It verifies the presence of the phrase in headings and paragraphs. It assesses keyword saturation and keyword spread in the content. It indicates usage in links and form labels. It reports the final score on a scale of 0–100. It shows the number of checks, errors, alerts, and notifications. It presents a table with the most frequently used words and phrases.

How does the Online On-page SEO Checker tool help SEO specialists and website owners?

• You receive an on-page score on a 0–100 scale. You see the optimization level for the phrase.
• You get a summary of the analysis. The number of checkpoints, errors, alerts, and notifications.
• You have a list of specific things to optimize. This covers title, meta description, h1, and content, among others.
• You compare phrase usage in key places. Including the first and last 100 words.
• You receive a table of keyword occurrences. You see repetitions and percentage saturation of given words.
• You verify consistency between the title and h1. You avoid unnecessary duplication.
• You control the phrase in links and in alt attributes of images. You fill gaps in your optimization.
• You preview the most frequently used words and phrases on the page. You tailor content to the topic.
• You see if the phrase appears at the start of the title and h1.
• You get numeric data for the brief and report. Score 0–100 with the number of errors, alerts, and notifications.

Typical uses of the Online On-page SEO Checker tool

• Assess if the main phrase is in the title, meta description, h1, subheadings, and paragraphs.
• Check for the occurrence of the phrase in the first 100 words and in the last 100 words of content.
• Headings analysis. Detect usage in h2 and in other heading levels.
• Control of occurrences in the URL. Detect excessive repetition in the address.
• Verify the phrase in image alt attributes.
• Check the phrase in links and anchor text. Also in external links.
• Identify phrase usage in list elements (li), b and strong tags.
• Detect usage in ID and NAME attributes as well as in label tags.
• Assess keyword saturation. Match density to the context.
• Initial on-page optimization for new pages and posts.

Comparison: Online On-page SEO Checker vs. other tools

Functionality	DiagnoSEO	Other Tools
Detailed analysis of keyword distribution	✅	❌
Assessment of keyword saturation and density	✅	✅
Verification of phrase in title, h1, h2, URL, and paragraphs	✅	❌
Check of phrase in image alt and image paths	✅	❌
Check for phrase occurrence in links and anchor text	✅	❌
On-page SEO scoring on a 0–100 scale and control summary	✅	✅
Table of most frequently used phrases	✅	✅
Check of phrase occurrence for the first and last 100 words of content	✅	❌

Tips & Best Practices

• Place the phrase at the beginning of the title. Avoid keyword stuffing.
• Add the phrase to the meta description. This increases CTR. Ensure a clear message.
• Use the phrase in h1. Ensure clarity and logical structure of headings.
• Include the phrase in the first 100 words. Emphasize the topic of your content.
• Spread the phrase across headings and lists. Maintain a natural style.
• Monitor keyword saturation. Focus on meaning and context.
• Add the phrase to the alt attribute of images (only if the image relates to the topic).
• Avoid repeating the phrase in the URL. Simple structure is better. Use short URLs.
• Check the phrase in anchor text of internal links. Add internal linking to related subpages.
• Avoid linking to external sites with the keyword in anchor text.
• Supplement related phrases from the TF-IDF tool. This significantly boosts on-page optimization.

Most Common Mistakes

• No phrase at the start of title or in the first 100 words.
• Excessive keyword saturation. The text loses its natural flow.
• Repeating the phrase in the URL.
• Identical title and h1 content.
• Missing phrase in image alt.
• Phrase used only in a single paragraph.
• Too high main keyword saturation (keyword stuffing).
• Ignoring errors and alerts in the report. No follow-up actions.

How to use the Online On-page SEO Checker tool

1. Enter the URL.
2. Provide the keyword phrase you want to rank for in search engines.
3. Click the button to start the analysis. Wait for the score and checklist.
4. Check title, meta description, and h1. Make adjustments as needed.
5. Verify the phrase in the first 100 words and the last 100 words.
6. Review the headings. Ensure a clear keyword spread.
7. Assess keyword saturation. Strike a balance and make sense.
8. Check image alt attributes. Fill any gaps.
9. Run the analysis again. Compare the 0–100 score.

Case study

A sample page achieved a score of 60 out of 100. The report showed 5 significant errors. The keyword was not at the start of the title and there was no occurrence in the meta description. The tool also detected a missing phrase in the alt attribute, subheadings, and content. The user applied recommendations and improved the title, meta description, h1, alt, and phrase saturation in the content. The optimization score improved as well as phrase optimization. After submitting the URL for re-indexing in Google Search Console, the average position improved from 11th to 5th place.

FAQ

• What exactly does the tool check?

  The tool checks the level of page optimization for a given keyword phrase. It checks, among other things, the usage of the keyword phrase in title, meta description, h1, and the content. It verifies paragraphs, image alts, links, and lists. It assesses phrase saturation and distribution.

• What's the difference between distribution and saturation?

  Distribution relates to where the phrase is used. Saturation describes the number of repetitions and the percentage share of the given phrase in the text.

• How do I interpret the 0–100 score?

  This is an indicator of on-page optimization level for the phrase. A higher score means better optimization.

• Which elements are the most important?

  The most important are title, h1, the first 100 words, and meta description (to improve CTR). Subheadings and the alt attribute are also important.

• Does the tool work for multiple languages?

  Yes. The analysis is based on the HTML structure and text. It is universal for different languages and markets.