Technical SEO & Developer Tools
Browser-side utilities for technical audits, metadata snippet validation, schema generation, and SEO ROI calculations. All data is processed client-side. No signups or tracking.
SEO Tools
SEO HTML Source Analyzer
Inspect basic SEO signals and structured data in a page's supplied HTML source.
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Meta Tag Snippet Analyzer
Draft title and meta description text, compare approximate display widths, and copy escaped HTML without mistaking it for Google's live snippet.
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SEO URL Slug Generator
Convert raw titles into clean, hyphenated SEO-friendly URL slugs.
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Keyword Density Analyzer
Analyze keyword frequency and n-gram density across your article copy.
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Readability Score Calculator
Measure content readability scores and sentence structure difficulty.
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Canonical URL Checklist
Review page and canonical URLs against six self-reported checks; the tool does not fetch pages.
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Internal Linking Opportunity Finder
Discover contextually relevant anchor texts and internal linking targets.
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Keyword Idea Generator
Generate synthetic seed/modifier candidates; verify demand and intent separately.
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H1 and Heading Structure Checker (H1-H6)
Audit pasted HTML for multiple H1 tags, skipped heading levels and H1-H6 hierarchy problems.
→Content Tools
Reading Time Calculator
Calculate estimated reading duration and word count statistics.
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SEO Title Checker and Headline Analyzer
Check SEO titles for length, numbers, year, repeated words and topic match. No made-up quality score.
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FAQ Schema Generator
Generate FAQPage JSON-LD from visible questions and answers. No rich-result guarantee.
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Character and Word Counter
Count characters, words, sentences, and paragraphs against common SEO and social limits.
→Measurement & Growth Tools
SEO ROI Calculator
Model monthly revenue, contribution after SEO cost, and scenario ROI from traffic and conversion assumptions. This is not a forecast.
→SEO Proposal Evaluator
Record confirmed, missing and unknown answers for 12 proposal items with evidence notes.
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Organic Traffic Estimator
Compare monthly click scenarios using search volume and editable CTR assumptions.
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UTM Campaign URL Builder
Create consistent campaign URLs with validated UTM parameters.
→Design & Technical Tools
WCAG Color Contrast Checker
Compare two opaque sRGB HEX colors against WCAG 2.2 text contrast thresholds.
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Social Media Image Size Guide
Image canvases for six platforms with source checks, draft status and placement-specific limits.
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Open Graph Preview Tool
Create an illustrative card and escaped meta tag draft from manually entered OG fields.
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Redirect Map Builder
Map old URLs, import/export CSV, and review redirect chains and loops before a migration.
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Schema (JSON-LD) Generator
Draft JSON-LD for Article, Organization, LocalBusiness, and Product in your browser. Validate visible-content alignment and Google feature eligibility separately.
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Robots.txt Generator
Draft a general robots.txt policy with path and sitemap checks, broad-block warnings, and copyable output.
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Hreflang Tag Generator
Generate hreflang tag drafts from language, script, region and URL inputs, including x-default. Live pages and reciprocal links are not checked.
→XML Sitemap Generator & Validator
Build sitemap XML from a URL list or check an existing sitemap for host, duplicate and protocol issues.
→Tool Center
Fast browser-side checks for everyday SEO work
Use these utilities before publishing to validate metadata, content structure, accessibility, tracking links, and basic growth assumptions without sending your inputs to a server.
Get the most from each tool
- Choose the utility that matches the decision you need to make.
- Enter real page data instead of placeholder content.
- Review the result together with the page context and search intent.
- Apply the change, then run the check again before publishing.
What can these tools solve?
- Pre-publication metadata and content checks
- Technical markup and redirect planning
- Accessibility and visual asset validation
- Campaign measurement and SEO forecasting
Frequently asked questions
Are Seobify tools free?
Yes. The tools on this page can be used without creating an account.
Is the information I enter uploaded?
The listed utilities process their inputs in your browser unless a tool explicitly states otherwise.
Do tool results replace a professional audit?
No. They support focused checks; a complete audit also evaluates crawl behavior, page relationships, search demand, and business context.
Tools reveal symptoms. Let us audit the complete site.
Combine technical SEO, competitor analysis, and a practical growth plan in one review.