FREE ONLINE TOOLS
🔍 Free SEO Tools
Browse 29 free seo tools on FastTool. Most workflows run in your browser where local processing is supported, with no signup required.
About Our SEO Tools
Ranking higher in search results starts with solid SEO fundamentals. FastTool's free SEO tools let you analyze meta tags, check keyword density, generate robots.txt files, inspect Open Graph data, and audit on-page factors. All analysis happens client-side, so your website URLs and content remain private. Whether you are a blogger improving article visibility, a developer adding structured data, or an agency running site audits, these tools provide actionable insights without expensive subscriptions. Use them to identify issues, test fixes, and monitor improvements.
TASK WORKFLOWS
Start with a seo workflow
All SEO Tools (29)
Slug Generator
Generate URL slugs with diacritics removal, custom separators, max length, bulk mode and history.
Meta Tag Generator
Generate complete HTML meta tags with live Google SERP preview, Facebook and Twitter card previews, character count warnings, JSON-LD structured data, and a full SEO checklist.
Robots.txt Generator
Generate and validate robots.txt files with user-agent presets, crawl-delay, sitemap directives, URL tester, syntax validation, and common pattern templates.
Sitemap Generator
Create XML sitemaps from a list of URLs.
Open Graph Preview
Preview how links appear on social media platforms.
Meta Description Checker
Check meta description length and preview how it appears in Google.
Keyword Density Checker
Analyze keyword density with 1/2/3-word phrase tables, stop word filtering, target keyword highlighting, TF-IDF estimation, reading stats, and visual density bars.
Title Tag Checker
Analyze SEO title tags with pixel width check, Google SERP preview, power word analysis, and 0-100 score.
Page Speed Estimator
Estimate your webpage's performance score and get actionable tips to improve load speed.
XML Sitemap Generator
Generate a valid XML sitemap from a list of URLs — set priority, change frequency, and last modified date for each URL.
Schema Markup Generator
Generate JSON-LD structured data for articles, products, FAQs, and organizations — improve search engine rich results.
Redirect Checker
Check URL redirect chains with live fetch, status codes, response times, and visual chain diagram. Batch URL support.
YouTube Title Generator
Generate click-worthy YouTube titles optimized for search — enter your topic and target audience to get 10 title variations with power words, numbers, and SEO best practices.
Hreflang Tag Generator
Generate hreflang HTML tags for international SEO. Select languages and enter URLs for each locale to create the correct link rel=alternate tags for your multilingual website's head section.
Robots.txt Validator
Validate your robots.txt file syntax and check for common errors. Paste your robots.txt content to see a detailed report of user-agents, disallow/allow rules, sitemaps, and any issues affecting crawling.
Google Snippet Preview
Preview exactly how your page title, URL, and meta description will appear in Google search results before publishing. Instantly spot truncation issues, optimize for click-through rates, and fine-tune your SEO metadata with real-time character counts.
Robots.txt Tester
Test and validate robots.txt rules against URL paths and user agents.
Open Graph Preview
Preview how your page looks when shared on Facebook, LinkedIn, and Discord.
Twitter Card Preview
Preview and generate Twitter Card meta tags for your web pages.
Schema Markup Generator
Generate JSON-LD structured data for 10 schema types with validation.
Sitemap Validator
Validate sitemap.xml files for errors, warnings, and URL statistics.
SEO Content Brief Builder New
Turn a target keyword into a structured SEO content brief with title angles, outline, FAQ cluster, schema suggestions, and on-page checklist.
Content Refresh Priority Matrix New
Score pages by impressions, CTR, position, and business value so you know exactly which URLs to refresh first.
Programmatic SEO Cluster Mapper New
Turn a core topic into a pillar-plus-cluster plan with tool pages, comparison pages, support content, links, and monetization angles.
Meta Description Length Checker New
Measure your meta description length in characters, words, and pixels with a live Google SERP preview — hit the 120-160 sweet spot.
Title Tag Length Checker New
Check your HTML title tag length with pixel-accurate measurement and live Google SERP preview — stay under the 580px truncation line.
SERP Pixel Ruler New
Pixel-accurate Google SERP preview using Arial 18px/14px (desktop) and 16px/12.8px (mobile). Unicode-aware, shows exact truncation before publish.
Internal Link Graph Builder New
Force-directed internal link graph with PageRank-ranked hubs, orphan page detection, and cluster analysis. Exports SVG.
Keyword Cannibalization Detector New
TF-IDF cosine similarity between two pages targeting the same keyword. Identifies merge vs differentiate opportunities.
Which SEO Tool Should You Start With?
Use this quick comparison to choose the right free seo tool for the job instead of opening tools one by one.
| Ranked tool | Best for | Action |
|---|---|---|
| #1 Slug Generator | diacritics transliteration | Open tool |
| #2 Meta Tag Generator | Google SERP preview | Open tool |
| #3 Robots.txt Generator | user-agent presets | Open tool |
| #4 Sitemap Generator | URL list input | Open tool |
| #5 Open Graph Preview | Facebook preview | Open tool |
| #6 Meta Description Checker | character count | Open tool |
| #7 Keyword Density Checker | 1/2/3-word phrase analysis | Open tool |
| #8 Title Tag Checker | character and pixel width estimation | Open tool |
How We Chose These Tools
SEO tools are ranked for standards-aligned output, crawl-safe metadata, and checks that map directly to publish-time decisions.
The tool must produce something a visitor can copy, download, compare, or act on immediately.
Public tools need concrete input/output examples so the page is more than a generic catalog card.
Sensitive categories include conservative language and direct links to policy, privacy, and disclaimer pages.
SEO Tool Quality Checklist
A strong seo tool page should do more than name a utility. It should help visitors understand when to use it, what result to expect, and how to verify the output before relying on it. On FastTool, review-public seo pages are selected for crawl-safe output, metadata that can be verified, and checks that map to real publishing decisions.
For the best result, open the tool that matches the job, review the guidance and examples when available, then adjust the input to your real case. If the task is sensitive, regulated, financial, medical, legal, or security-critical, treat the tool result as a starting point and confirm it with an appropriate professional source or official documentation.
Worked examples show the input shape, expected output, and why the result matters.
Every browser tool has limits around file size, device power, context, or professional suitability.
Combine related tools when a task needs validation, conversion, formatting, and export.