Free SEO Tools Hub by SEO Nimbus
Explore API-free utilities you can use right in your browser—perfect for quick audits, content polish, and technical fixes. No sign-up required.
301 Redirect Chain Finder (manual)
Check redirect chains in pasted HTML.
Affiliate Link Cloaker (basic)
Generate cloaked affiliate links.
Alt Text Checker
Check missing alt text in images.
AMP Boilerplate Generator
Generate boilerplate AMP HTML for pages.
AMP Validator (manual)
Validate AMP HTML code offline.
Anchor Density Checker
Check anchor text usage for over-optimization.
Anchor Over-Optimization Checker
Detect overuse of exact match anchors.
Anchor Text Analyzer
Analyze anchor text usage in content.
Anchor Variation Generator
Generate natural anchor text variations.
Breadcrumb Builder
Generate breadcrumb HTML.
Broken Link Finder
Find broken links in HTML code.
Bulk UTM Builder
Generate multiple UTM-tagged URLs at once.
Cache-Control Helper
Generate Cache-Control policies.
Canonical Chain Detector (manual)
Detect canonical chains from pasted lists.
Canonical Comparator
Compare two URLs’ canonical logic.
Canonical Tag Generator
Generate canonical tags for duplicate URLs.
Case Converter
Convert text into uppercase, lowercase, or title case.
Character Counter
Count characters, words, and spaces in text.
Color Contrast Checker
Check text color contrast for accessibility.
Content Idea Generator
Generate blog post ideas from seed keywords.
Content Length Checker
Check total content length for SEO.
Content Outline Generator
Generate content outlines from keywords.
Critical CSS Extractor
Extract above-the-fold CSS from HTML.
CSS Box Shadow Generator
Create CSS box-shadow code visually.
CSS Flexbox Generator
Generate flexbox CSS layouts easily.
CSS Formatter
Beautify and format CSS code.
CSS Gradient Generator
Create CSS gradient backgrounds visually.
CSS Grid Generator
Build grid layouts with CSS Grid visually.
CSS Minifier
Compress CSS for better performance.
CTA Generator (templates)
Generate call-to-action lines from templates.
Diacritics Remover
Strip accents for clean slugs and keywords.
Disavow File Generator
Create disavow.txt files for Google.
Duplicate H1 Finder
Find pages with multiple H1 tags (paste HTML).
Duplicate Line Finder
Find duplicate lines in your content.
Emoji SEO Title Generator
Add emojis to SEO titles for CTR boost.
Entity Highlighter (rules-based)
Highlight brand, person, and place names.
External Link Density Checker
Check outbound link density per page.
FAQ Builder
Build clean Q&A blocks for pages.
Favicon Generator
Create favicons for your website.
First 100 Words Checker
Check keyword presence in the intro.
Font Loading Optimizer
Generate preconnect and preload tags for Google Fonts.
Heading Balance Analyzer
Check H2/H3 distribution.
Heading Structure Checker
Check heading hierarchy for SEO.
Headline Score (rules-based)
Score headlines for length and power words.
Hreflang Tag Generator
Generate hreflang tags for multilingual SEO.
Hreflang Validator
Validate language–region codes.
Htaccess Generator
Create .htaccess rules for redirects and SEO.
HTML → Markdown Converter
Turn HTML into lightweight Markdown.
HTML Boilerplate Generator
Generate clean HTML5 boilerplate code.
HTML Entity Converter
Convert text to HTML entities.
HTML Formatter
Format messy HTML code into clean markup.
HTML Minifier
Minify HTML code for faster pages.
HTML Strip Tags
Remove HTML tags from text.
HTTP Header Snippet Builder
Generate server header configs.
Image Alt Generator (manual)
Create descriptive alt text for images.
Image Compression Estimator
Estimate potential image compression savings.
Image Compression Estimator (extended)
Estimate compression savings for multiple images.
Image Dimension Checker
Check missing width/height attributes.
Image to WebP Converter
Convert images to WebP format online.
Inline CSS Generator
Convert CSS rules into inline styles.
Internal Link Density Checker
Check density of internal links per page.
Internal Link Suggestor (manual)
Find internal linking opportunities.
Internal vs External Link Ratio
Calculate internal vs external links.
Intro Length Checker
Gauge intro paragraph length.
JavaScript Minifier
Minify JavaScript files.
JS Formatter
Format messy JavaScript into readable code.
JSON Minifier & Formatter
Minify or prettify JSON.
Keyword Frequency Counter
Count keyword occurrences in your text.
Keyword Gap Checklist (manual)
Checklist to spot content gaps.
Keyword Grouping Tool
Cluster keywords by root words.
Keyword Highlight Tool
Highlight target keywords in text.
Keyword Placement Checker
Check keyword placement in text.
Keyword Stemmer (basic)
Reduce words to stems for grouping.
Keyword Variations Expander
Create basic keyword permutations.
Lazy Load Code Generator
Generate lazy loading code for images.
Lazy-Load Video Embed Generator
Generate lazy-loading YouTube and Vimeo embeds.
Link Extractor
Extract all links from webpage HTML.
Link Shortener (basic)
Create clean, short SEO-friendly URLs.
Link Title Attribute Checker
Audit link title usage.
List Density Analyzer
Check bullet/numbered list usage.
Manifest.json Generator
Create a Web App Manifest.
Markdown → HTML Converter
Convert Markdown to clean HTML for SEO pages.
Meta Description Preview Tool
Preview your meta description in Google’s search snippet.
Meta Robots Tag Generator
Generate meta robots directives.
Meta Tag Auditor (paste HTML)
Audit meta tags from pasted HTML.
Meta Tag Length Checker
Check if title and description fit SEO limits.
Meta Tags Generator
Generate SEO meta tags for your website.
Mobile Viewport Tag Generator
Generate viewport tags for responsive design.
Mobile-Friendly Test (manual)
Check if your layout is mobile-optimized.
N-Gram Phrase Extractor
Extract top 2-word and 3-word phrases from text.
nofollow Bulk Adder
Add nofollow attributes to multiple links.
nofollow Tag Checker
Identify nofollow links in HTML.
nofollow/dofollow Ratio Checker
Check balance of nofollow vs dofollow links.
Open Graph Generator
Generate Open Graph tags for Facebook sharing.
Open Redirect Checker
Check for potential open redirects.
Outbound Link Counter
Count outbound links in your page.
Outbound Link De-duper
Remove duplicate outbound links.
Outbound Link Domain Checker
Check outbound links by domain.
Outbound Link Exporter
Export external links as CSV.
Outbound Link Highlighter
Highlight outbound links in pasted HTML.
Outbound Link Nofollow Adder (rules)
Add rel='nofollow' by rule.
Outbound Noopener/Noreferrer Adder
Harden external links.
Outline to HTML Converter
Turn outlines into semantic HTML headings.
Pagination Tag Generator
Generate rel=prev/next tags.
Paragraph Length Checker
Check the structure of paragraphs for SEO readability.
Parameter Stripper
Remove query strings from URLs.
Plural/Singular Converter
Convert words between singular and plural forms.
Preload/Prefetch Generator
Generate resource hints.
Quote/Blockquote Finder
Find and count blockquotes.
Read Time Calculator
Estimate the reading time of content.
Readability Checker
Check the readability score of your content.
Redirect Generator
Generate 301 and 302 redirect rules.
Redirect Map Generator
Create a bulk redirect mapping file.
Redirect Type Helper
Choose 301 vs 302 via checklist.
Rel Attribute Manager
Edit rel attributes in bulk.
Responsive Image Generator
Generate responsive image code with srcset.
Robots.txt Generator
Create robots.txt files for SEO crawling rules.
Robots.txt Tester (rules-based)
Test if a path would be allowed.
Schema Markup Generator
Generate structured data for SEO.
Schema Preview Tool
Preview schema-rich snippets in search results.
Schema Validator
Validate JSON-LD schema markup offline.
Security Headers Generator
Create basic security headers.
Sentence Length Checker
Analyze average sentence length for readability.
Service Worker Boilerplate
Generate a basic offline SW file.
Sitemap Merger
Merge multiple sitemap files.
Sitemap Validator
Validate XML sitemaps offline.
Slug Case Converter
Convert text between slug, snake, camel cases.
Slug Generator
Convert text into SEO-friendly slugs instantly.
Sponsored Link Tagger
Mark affiliate links as sponsored.
SSL Checker
Check SSL certificate details manually.
Stop Words Remover
Remove stop words from text for SEO analysis.
SVG Optimizer (client-side)
Optimize SVG code in the browser.
Synonym Swapper (manual list)
Swap words using a custom synonym list.
Table Builder (semantic)
Create accessible HTML tables.
Table of Contents Generator
Generate a clickable ToC from headings.
Tel/Mailto Link Checker
Validate tel: and mailto: links.
Title Capitalization Tool
Format your titles into SEO-friendly capitalization.
Title Tag Preview Tool
Preview how your title tag will appear in Google search results.
Twitter Card Generator
Create Twitter Card meta tags.
URL Decoder
Decode encoded URLs back to normal text.
URL Encoder
Encode URLs into safe formats.
UTM Builder
Create campaign tracking URLs.
UTM Cleaner
Remove UTM parameters from URLs.
UTM Template Library
Reusable UTM parameter presets.
Viewport Breakpoint Tester
Test responsive breakpoints in your CSS.
Viewport Meta Tag Generator (extended)
Generate optimized viewport tags.
Viewport Meta Tag Tester
Test viewport settings for responsive design.
Word Counter & Density Analyzer
Analyze word count and keyword density in your content.
X-Robots-Tag Header Generator
Generate X-Robots-Tag HTTP header values.
XML Sitemap Generator
Generate an XML sitemap for your site.
Want these tools white-labeled?
We can embed any tool as a widget or build a custom lead-gen flow for your niche.
Talk to SEO Nimbus