--- title: "Top 10 On-Page SEO Tools to Improve Your Rankings | Aemorph" url: https://aemorph.com/saas-tools/seo/onpage/ description: "Ten on-page SEO tools for content, metadata, crawling and page speed: Surfer, PageSpeed Insights, Screaming Frog, Yoast, Sitebulb, NitroPack and more." schema_type: Article publisher: Aemorph publisher_entity: https://aemorph.com/entitymap.json#org_aemorph language: en-SG updated: 2026-10-26 --- SaaS tools # Top 10 On-Page SEO Tools to Improve Your Rankings **On-page [SEO](https://aemorph.com/glossary/#seo-search-engine-optimisation) tools show you what to fix on each page, from content and metadata to broken links and load speed, so your pages match what searchers want and load fast enough to keep them.** The ten tools below cover content optimisation, site crawling, WordPress plugins and speed. Each entry says what the tool checks and who it suits. Written by [Kevin Dam](https://aemorph.com/about/), founder of Aemorph, who has practised SEO since 2010 and sits on the [Forbes Agency Council](https://councils.forbes.com/profile/Kevin-Dam-Global-Search-Architect-%7C-SEO-GEO-AEO-IMO-LLM-Visibility-Aemorph/4c8c7a38-1285-470d-8ea8-e517a310a00b). Aemorph is a [Google Partner](https://www.google.com/partners/agency?id=4441861842). [LinkedIn](https://www.linkedin.com/in/kevindam) ## Choose an On-Page SEO Tool by What You Need to Fix **On-page tools fall into four groups: content optimisation, crawling and audits, WordPress plugins and speed.** Most sites need one tool from each group. | Tool | What it checks | Best for | Group | | --- | --- | --- | --- | | Surfer | Content against top-ranking pages | Writers editing drafts | Content | | PageSpeed Insights | Load speed on mobile and desktop | Every site owner | Speed | | Screaming Frog SEO Spider | Titles, links, duplicates and crawl issues | SEO specialists | Crawling | | Ahrefs Site Audit | Technical issues and a health score | Teams already on Ahrefs | Crawling | | DefiniteSEO | AI fixes for on-page issues in WordPress | WordPress sites | Plugin | | Yoast SEO | Content, links and sitemaps in WordPress | WordPress sites | Plugin | | Semrush On-Page SEO Checker | Ideas based on competitors | Teams already on Semrush | Content | | Moz On-Page Grader | A page score and fix checklist | Quick single-page checks | Content | | Sitebulb | Visual audits and internal linking | Large or complex sites | Crawling | | NitroPack | Caching, compression and lazy loading | Sites that need faster pages | Speed | ## 1\. Surfer: Content Optimisation Against Top-Ranking Pages **Surfer compares your page with the pages that rank for your keyword and gives live suggestions, so you add what searchers expect before you publish.** [Surfer](https://surferseo.com/) suits writers and editors. ![Surfer website, showing the home page on AI search visibility with a free trial button](https://aemorph.com/media/saas-tools/seo-onpage/surfer.webp) *Screenshot: Surfer website, October 2026.* - **Checks** content and headings for gaps. - **Suggests** terms to cover and internal links to add. - **Scores** the page as you edit. ## 2\. PageSpeed Insights: Find What Slows Your Pages **PageSpeed Insights measures how fast a page loads on mobile and desktop and lists what to fix, so you keep visitors who leave slow pages.** [PageSpeed Insights](https://pagespeed.web.dev/) is free from Google. ![PageSpeed Insights website, showing the PageSpeed Insights page with a web page URL entry box](https://aemorph.com/media/saas-tools/seo-onpage/pagespeed-insights.webp) *Screenshot: PageSpeed Insights website, October 2026.* - **Finds** slow pages and gives specific fixes. - **Measures** Core Web Vitals such as loading and layout shifts. - **Flags** problems such as large images and slow scripts. ## 3\. Screaming Frog SEO Spider: Crawl Your Site for SEO Problems **Screaming Frog crawls your site the way a search engine does and lists every missing title, broken link and duplicate page, so you fix the errors that hold rankings back.** Screaming Frog SEO Spider has a free version for up to 500 URLs. ![Screaming Frog SEO Spider website, showing the SEO Spider page with download and pricing buttons](https://aemorph.com/media/saas-tools/seo-onpage/screaming-frog-seo-spider.webp) *Screenshot: Screaming Frog SEO Spider website, October 2026.* - **Finds** missing titles and meta descriptions. - **Checks** internal and external links. - **Detects** duplicate content and crawl issues. ## 4\. Ahrefs Site Audit: Technical Checks With a Health Score **Ahrefs Site Audit scans your site for SEO issues and gives it a health score, so you see which problems affect the most pages.** Ahrefs Site Audit suits teams already using Ahrefs. ![Ahrefs Site Audit website, showing the Site Audit page with a domain entry box](https://aemorph.com/media/saas-tools/seo-onpage/ahrefs-site-audit.webp) *Screenshot: Ahrefs Site Audit website, October 2026.* - **Detects** thin content and other content issues. - **Scores** site health from the issues found. - **Flags** problems such as missing alt text and redirect chains. ## 5\. DefiniteSEO: AI On-Page Fixes for WordPress **DefiniteSEO is a WordPress plugin that finds on-page SEO issues and fixes them one at a time or in bulk, so WordPress sites stay optimised with less manual work.** DefiniteSEO offers a free plugin and a Pro version. ![DefiniteSEO website, showing the home page for the DefiniteSEO WordPress plugin](https://aemorph.com/media/saas-tools/seo-onpage/definiteseo.webp) *Screenshot: DefiniteSEO website, October 2026.* - **Scores** each post and lists what holds it back. - **Generates** meta titles, descriptions and schema markup with AI. - **Suggests** internal links and keyword improvements. ## 6\. Yoast SEO: On-Page Guidance in WordPress **Yoast SEO checks each post as you write and handles sitemaps, so WordPress site owners cover the basics without technical help.** Yoast SEO is one of the most widely used WordPress SEO plugins. ![Yoast SEO website, showing the home page with download buttons and a features video](https://aemorph.com/media/saas-tools/seo-onpage/yoast-seo.webp) *Screenshot: Yoast SEO website, October 2026.* - **Checks** keyword use and placement. - **Suggests** internal links. - **Creates** XML sitemaps for search engines. ## 7\. Semrush On-Page SEO Checker: Ideas From Your Competitors **Semrush's On-Page SEO Checker compares your pages with the pages that outrank them and lists specific improvements.** Semrush On-Page SEO Checker suits teams already on Semrush. ![Semrush On-Page SEO Checker website, showing the On Page SEO Checker page with a domain entry box](https://aemorph.com/media/saas-tools/seo-onpage/semrush-on-page-seo-checker.webp) *Screenshot: Semrush On-Page SEO Checker website, October 2026.* - **Checks** keyword use on each page. - **Finds** missing internal links and content ideas. - **Compares** your pages with top-ranking pages. ## 8\. Moz On-Page Grader: A Quick Page Score **Moz On-Page Grader gives a single page an optimisation score and a checklist of fixes, so you review one page in minutes.** Moz On-Page Grader suits quick checks before publishing. ![Moz On-Page Grader website, showing the On Page Grader page with a free trial button and how it works steps](https://aemorph.com/media/saas-tools/seo-onpage/moz-on-page-grader.webp) *Screenshot: Moz On-Page Grader website, October 2026.* - **Checks** titles, headings and keyword use. - **Scores** the page for its target keyword. - **Lists** recommended fixes. ## 9\. Sitebulb: Visual Audits for Complex Sites **Sitebulb explains each issue it finds and shows your internal linking visually, so large sites see where structure weakens rankings.** Sitebulb suits agencies and large sites. ![Sitebulb website, showing the home page on website crawling for SEO audits](https://aemorph.com/media/saas-tools/seo-onpage/sitebulb.webp) *Screenshot: Sitebulb website, October 2026.* - **Detects** duplicate content and broken external links. - **Highlights** internal linking problems. - **Crawls** large sites for in-depth audits. ## 10\. NitroPack: Automatic Speed Improvements **NitroPack speeds up your site automatically with caching, compression and lazy loading, so pages load faster without manual development work.** NitroPack suits sites that struggle with load times. ![NitroPack website, showing the home page on WordPress site speed with a product tour panel](https://aemorph.com/media/saas-tools/seo-onpage/nitropack.webp) *Screenshot: NitroPack website, October 2026.* - **Reduces** JavaScript and CSS load. - **Improves** Core Web Vitals scores. - **Caches** and compresses pages and images. ## How On-Page Tools Improve Your Rankings **On-page tools find the gaps between your pages and what searchers expect, then point you to the fixes with the biggest effect.** ### How do search engines evaluate on-page SEO? **Search engines read your content, headings, metadata, links and page experience to judge how well a page answers a search.** Pages with useful content, clear structure and fast load times tend to perform better. The [on-page SEO audit guide](https://aemorph.com/guides/on-page-seo-audit/) walks through each check. ### Why is keyword research part of on-page SEO? **Keyword research tells you which terms your buyers use, so each page targets a search with real demand and clear intent.** The [keyword research guide](https://aemorph.com/guides/keyword-research/) explains the method. ### How do internal links affect rankings? **Internal links help search engines find your pages and understand how they relate, and they pass authority to the pages that matter most.** Sitebulb and Screaming Frog show where internal linking is weak. ### Why does page speed matter? **Slow pages lose visitors and weaken page experience, which Google uses as part of its ranking systems.** PageSpeed Insights and NitroPack find and fix the biggest delays. ### What on-page problems hold rankings back? **Missing or duplicate titles, thin content, broken links, missing internal links and slow load times are the most common on-page problems.** A crawler such as Screaming Frog lists them in one report. ## Fix Your Pages as Part of an SEO Plan **On-page tools show what to fix, and an SEO plan decides which pages to fix first.** Run an [on-page SEO audit](https://aemorph.com/guides/on-page-seo-audit/), read the [image SEO guide](https://aemorph.com/guides/image-seo/), or let [Aemorph's SEO service](https://aemorph.com/services/seo/) handle the work for you. THE STRATEGIC CONVERSATION ## Start with a free *strategic conversation*. Every Aemorph engagement starts with a free strategic conversation. It is the fastest way to see whether Aemorph fits your business before you commit budget. [Book a strategic conversation →](https://aemorph.com/contact/) STARTING POINT Free You talk through your goals with Aemorph, and Aemorph quotes your engagement after the conversation.