Free SEO & Content Tools
Robots.txt generator, XML sitemap, schema markup, meta tags, keyword density, content optimizer, readability grader, and more — all free, all browser-based, zero data uploaded.
11
Free Tools
3
SEO Categories
0
Signup Needed
100%
Browser-Based
🔧 Technical SEO
Robots.txt Generator
Control which crawlers access which pages
Generate a valid, standards-compliant robots.txt file. Set per-crawler rules, disallow specific paths, add a sitemap directive, and control crawl-delay — all with live preview and one-click download.
- Block admin and staging paths from Googlebot
- Set crawl-delay for bandwidth-limited servers
- Declare sitemap location for all crawlers
XML Sitemap Generator
Build sitemap.xml with per-URL controls
Create a standards-compliant sitemap with full per-URL priority, changefreq, and lastmod controls. Bulk import, URL validation, duplicate detection, and a sitemap index generator for large sites.
- Speed up indexing of new pages
- Submit to Google Search Console
- Generate sitemap index for 50k+ URL sites
Schema Markup Generator
JSON-LD structured data for rich results
Generate valid JSON-LD schema markup for 15+ types: Article, Product, FAQ, HowTo, Recipe, Event, LocalBusiness, and more. Produces Google-compatible code ready to paste into your HTML.
- Add FAQ dropdowns to search results
- Enable star ratings for products
- Unlock HowTo rich snippets
Meta Tag Generator
Title, description, Open Graph & Twitter Cards
Generate fully optimized meta title, meta description, Open Graph, and Twitter Card tags with live character and pixel-width counters. Preview exactly how your page appears in Google and on social media.
- Optimise title tags for 50–60 char limit
- Write compelling meta descriptions
- Set Open Graph images for social sharing
📝 Content Optimization
Content Optimizer
Score content against a target keyword
Analyse your content against a target keyword using TF-IDF scoring, semantic richness detection, and on-page SEO checks. Get actionable suggestions to improve topical depth and relevance.
- Optimise blog posts for target keywords
- Improve content relevance scores
- Identify missing semantic terms
Readability & Content Grader
Grade reading level & suggest improvements
Calculate Flesch-Kincaid, Gunning Fog, SMOG, and three other readability scores. Highlights complex sentences, passive voice, and overlong paragraphs with specific improvement suggestions.
- Simplify content for general audiences
- Meet readability requirements for editorial standards
- Improve dwell time by reducing complexity
Keyword Density Checker
Analyse keyword frequency & density
Measure how often any keyword appears in your content and calculate its density percentage. Identifies over-optimized (stuffed) keywords and under-represented terms across the full text.
- Verify keyword density is in the 1–3% range
- Avoid keyword stuffing penalties
- Audit competitor content keyword usage
Keyword Research Tool
Discover keyword ideas & search intent
Generate keyword ideas, related terms, and question-based queries from any seed keyword. Understand search intent (informational, navigational, transactional) to align content with what searchers actually want.
- Find long-tail keyword opportunities
- Plan content clusters
- Match content to search intent
👁️ Visibility & Accessibility
SEO Analyzer
Audit any webpage for on-page SEO issues
Analyse any URL for title tags, meta descriptions, headings structure, image alt text, internal and external links, page speed signals, and mobile-friendliness. Get a prioritised action list.
- Audit a new blog post before publishing
- Find SEO issues on existing pages
- Check competitor pages for gaps
Alt Text Generator
Generate SEO-friendly image alt text
Upload an image or provide a URL and get AI-powered alt text suggestions that are descriptive, keyword-aware, and accessibility-compliant. Improve Google Images ranking and screen-reader support.
- Generate alt text for product photos
- Audit images missing alt attributes
- Improve WCAG accessibility compliance
Privacy Policy Generator
GDPR & CCPA-compliant privacy policy
Generate a complete, professionally written privacy policy for your website in minutes. Covers GDPR, CCPA, cookie disclosures, third-party services, and data retention policies.
- Add a required privacy policy before launch
- Update policy for GDPR compliance
- Disclose third-party analytics use
Which SEO Tool Should I Use?
Match your task to the right tool:
| I need to… | Example | Use this tool |
|---|---|---|
| Control which pages Googlebot can crawl | Block /admin/ and /staging/ | Robots.txt Generator |
| Help Google discover all my pages | New blog with 300 posts | XML Sitemap Generator |
| Get rich results (stars, FAQs, HowTo) | Product page or FAQ article | Schema Markup Generator |
| Optimise title and description tags | Keep title under 60 chars | Meta Tag Generator |
| Improve content for a target keyword | Blog post on "compound interest" | Content Optimizer |
| Check if content is easy to read | Article for general audience | Readability & Content Grader |
| Find how often a keyword appears | Check density is 1–3% | Keyword Density Checker |
| Discover new keywords to target | Seed keyword: "password manager" | Keyword Research Tool |
| Audit a page for all on-page SEO issues | Full audit before publishing | SEO Analyzer |
| Generate alt text for images | Product photos missing alt attribute | Alt Text Generator |
| Create a GDPR-compliant privacy policy | New website pre-launch requirement | Privacy Policy Generator |
Meta Tag Character Limits Reference
Google and social platforms truncate meta tags beyond these limits. Stay within them for full visibility.
| Tag | Platform | Recommended Length | Hard Limit | Notes |
|---|---|---|---|---|
| <title> | Google Search | 50–60 chars | ~600px wide | Most important tag for rankings & CTR |
| <meta description> | Google Search | 150–160 chars | ~920px wide | No ranking impact — affects CTR only |
| og:title | Facebook / OG | 60 chars | 100 chars | Controls preview when shared on social |
| og:description | Facebook / OG | 60–90 chars | 300 chars | Truncated at ~2 lines in feed previews |
| twitter:title | X / Twitter | 70 chars | 70 chars | Longer titles are cut off in cards |
| twitter:description | X / Twitter | 100–120 chars | 200 chars | Shown under the title in summary cards |
Schema Markup Types & Rich Results
Each schema type can unlock a specific rich result format in Google Search. The Schema Markup Generator supports all of these.
| Schema Type | Rich Result Unlocked | Best For |
|---|---|---|
| FAQPage | FAQ dropdown accordion below listing | Knowledge base articles, support pages |
| HowTo | Step-by-step instructions with images | Tutorial and guide content |
| Product | Price, availability, and star ratings | E-commerce product pages |
| Recipe | Cook time, ingredients, calories, ratings | Food blogs and recipe sites |
| Article | Improved news and article treatment | Blog posts and news articles |
| LocalBusiness | Business info in Knowledge Panel | Physical stores and service businesses |
| Event | Event name, date, location in search | Conferences, concerts, webinars |
| BreadcrumbList | Breadcrumb trail in URL in search result | All multi-level sites |
| VideoObject | Video thumbnail and duration in results | Pages with embedded videos |
| WebSite | Sitelinks search box in search results | Large sites and homepages |
Keyword Density Guide
Keyword density = (occurrences ÷ total words) × 100. Use the Keyword Density Checker to calculate this instantly.
| Density Range | Assessment | What It Signals | Action |
|---|---|---|---|
| < 0.5% | ⚠️ Too Low | Topic may be insufficiently covered | Add more natural uses of the keyword |
| 0.5–1% | 🟡 Low | Keyword present but could be stronger | Consider adding 1–2 more uses |
| 1–3% | ✅ Optimal | Natural, well-optimised density | Maintain current density |
| 3–5% | 🟠 High | May start to look repetitive to readers | Replace some instances with synonyms |
| > 5% | ❌ Keyword Stuffing | Google may penalise; content reads unnaturally | Reduce keyword frequency significantly |
Readability Score Reference
The Readability & Content Grader calculates all six of these scores simultaneously.
| Formula | Scale | Ideal for Web | Measures |
|---|---|---|---|
| Flesch Reading Ease | 0–100 (higher = easier) | 60–70 | Sentence length + syllable count |
| Flesch-Kincaid Grade Level | US grade level (1–17+) | 7–9 | School grade needed to understand |
| Gunning Fog Index | Grade level (1–17+) | 8–10 | Complex words (3+ syllables) |
| SMOG Grade | Grade level | 8–10 | Polysyllabic words per 30 sentences |
| Coleman-Liau Index | Grade level | 8–10 | Characters per word, words per sentence |
| Automated Readability Index | Grade level | 8–10 | Characters per word and word per sentence |
Who Uses These SEO Tools?
Bloggers & Content Creators
Use the Content Optimizer and Readability Grader to improve posts before publishing. Use the Keyword Density Checker to verify keyword usage and avoid stuffing penalties.
Website Owners
Use the Robots.txt Generator, XML Sitemap Generator, and Meta Tag Generator to handle essential technical SEO without needing a developer or paid tool.
SEO Specialists
Use the SEO Analyzer for quick page audits, the Schema Markup Generator for structured data, and the Keyword Research Tool for content planning.
E-commerce Managers
Use the Alt Text Generator for product images, the Schema Markup Generator for Product rich results (price, availability, ratings), and the Meta Tag Generator for product page titles.
Digital Marketers
Use the Keyword Research Tool and Content Optimizer together to build topically authoritative content that matches search intent and outranks competitors.
Developers & Agencies
Use the Robots.txt Generator, Sitemap Generator, and Privacy Policy Generator when launching client websites. Bulk-generate schema markup for sites with many page types.
Why Use Texterfly SEO Tools?
Instant Results
All tools run in your browser in real time — no upload queues, no waiting for server responses. Results appear as you type.
Private by Design
Your content, URLs, and keywords never leave your browser. All processing is client-side JavaScript — no data logged, no third-party tracking.
Actionable Output
Every tool produces output you can use immediately: ready-to-paste JSON-LD, downloadable robots.txt and sitemap.xml, copyable meta tags, and specific content improvement suggestions.
Frequently Asked Questions
What SEO tools does Texterfly offer?
Texterfly offers 11 free SEO and content tools: Robots.txt Generator, XML Sitemap Generator, Schema Markup Generator, Meta Tag Generator, Content Optimizer, Readability & Content Grader, Keyword Research Tool, Keyword Density Checker, SEO Analyzer, Alt Text Generator, and Privacy Policy Generator. All are free, browser-based, and require no signup.
What is the ideal meta title length for SEO?
Google displays meta titles up to ~600px wide, which corresponds to 50–60 characters. Shorter than 50 characters misses keyword opportunities; longer than 60 characters is truncated with an ellipsis in search results. The Meta Tag Generator includes a live character counter and pixel-width preview so you stay within the optimal range.
What is the ideal meta description length?
Google shows meta descriptions of 150–160 characters (up to ~920px). Longer descriptions are truncated. Meta descriptions don't directly affect rankings but heavily influence click-through rate (CTR). Include the primary keyword and a clear call to action within the 160-character limit.
What should a robots.txt file contain?
A robots.txt file uses: User-agent (which crawler the rule applies to), Disallow (paths to block), Allow (override Disallow for specific sub-paths), Sitemap (URL of your sitemap.xml), and optionally Crawl-delay. Example: "User-agent: * / Disallow: /admin/ / Sitemap: https://example.com/sitemap.xml". Always test with Google's robots.txt tester in Search Console.
What is schema markup and why does it matter?
Schema markup is JSON-LD code that tells search engines what your content means — not just what it says. It can unlock rich results in Google Search: star ratings, FAQ dropdowns, HowTo steps, event dates, and breadcrumbs. These improve click-through rates significantly without directly affecting rankings. The Schema Markup Generator produces ready-to-paste JSON-LD for 15+ schema types.
What is keyword density and what is the ideal percentage?
Keyword density = (keyword occurrences ÷ total words) × 100. The generally accepted optimal range is 1–3%. Below 1% may mean the topic isn't well covered; above 3% risks keyword stuffing penalties from Google. The Keyword Density Checker calculates this instantly and flags over- and under-optimised terms.
Why is alt text important for SEO?
Alt text describes images to search engines, helping them rank in Google Images — a significant traffic source for product and media-heavy sites. It also makes content accessible to screen-reader users, improving WCAG accessibility compliance. Good alt text is descriptive, includes the primary keyword where natural, and is typically 8–15 words.
What is the Flesch-Kincaid readability score?
The Flesch-Kincaid Reading Ease score rates text on a 0–100 scale: 90–100 is very easy (5th grade); 60–70 is standard (8th–9th grade); 30–50 is difficult (college level). Most general web content should aim for 60–70. The Readability Grader calculates Flesch-Kincaid plus five other readability formulas.
What schema types does the generator support?
The Schema Markup Generator supports: Article, BlogPosting, Product, Review, FAQPage, HowTo, Recipe, Event, LocalBusiness, Organization, Person, BreadcrumbList, WebSite (with SearchAction), VideoObject, and WebApplication. Each produces valid JSON-LD testable in Google's Rich Results Test.
What is an XML sitemap and how does it help SEO?
An XML sitemap lists all important URLs on your site with metadata (lastmod, changefreq, priority). It helps search engines discover pages that might be missed through normal crawling — especially new content, orphaned pages, and pages with few internal links. Submitting it to Google Search Console speeds up indexing significantly.
Are these SEO tools free?
Yes. All 11 SEO and content tools on Texterfly are 100% free with no registration, subscription, or payment required.
Is my content and data private?
Yes. All processing runs entirely in your browser. Your content, URLs, and data are never sent to any server or stored anywhere.