Free AI Tools That Actually Work
Browse 59+ powerful browser-based tools for AI writing, SEO optimization, text editing and development. No signup, no limits, no cost.
Popular Tools
Useful tools to get started
SEO Migration Recovery Suite
3-step migration recovery — discover all URLs, audit for 404s and redirect issues, generate redirect CSV, robots.txt and schema fix files. Free for 25 URLs. Basic deterministic fixes included.
360° SEO + AEO + GEO Audit
Six-area diagnostic audit — Technical SEO, On-Page, Schema, AEO content, GEO readiness & discovery checks. Includes links to independent verification tools. Run time depends on the submitted site.
Technical SEO Auditor
Real-time technical SEO audit — detects 404 errors, redirect chains, robots.txt blocking, noindex tags, and canonical issues. Live HTTP observations with documented limitations.
SEO Audit Tool
Free real-time SEO audit powered by Google Lighthouse — check Core Web Vitals, SEO score and 40+ ranking factors
Broken Link Checker
Crawl any webpage and find every broken link, 404 error, redirect chain and dead image. Real HTTP requests — exact status codes for every link. Free for 100 links.
AI Crawler Checker
Inspect robots.txt rules for a URL path across seven documented OpenAI, Claude and Google tokens
AEO & GEO Audit Tool
Check if your site is optimized for ChatGPT, Claude, Perplexity & Google AI Overviews — real schema, robots.txt, and live discovery checks test
Structured Data Validator
Fetch your live URL, validate every JSON-LD schema block against schema.org rules, see exact errors with line numbers, and get rule-based checks auto-fixed schema ready to copy-paste
Robots.txt Generator
Generate robots.txt file
Website Speed Checker
Analyze website performance and Core Web Vitals
Schema Markup Generator
Generate JSON-LD structured data
Internal Link Suggester
Find internal linking opportunities for your new articles instantly
SERP Snippet Preview
Preview exactly how your title, meta description and URL render in Google, Bing and AI Overviews — with truncation warnings
Security Headers Grader
Grade any URL's HTTP security headers A+ to F — HSTS, CSP, X-Frame-Options, Referrer-Policy — with copy-paste fix snippets for Nginx, Apache, Vercel & Cloudflare
Open Graph Validator
Paste any URL — see how its Open Graph and Twitter Card render on Facebook, LinkedIn, X (Twitter), Slack and Discord. Replaces Twitter's killed validator.
Sitemap Visualizer
Fetch and visualize any sitemap.xml — tree view, URL count, duplicate finder, lastmod analysis. Pairs with the SEO Migration Suite.
Keyword Density & N-gram Analyzer
Paste any text — get keyword density, bigrams, trigrams, Flesch-Kincaid readability and over-optimization warnings. No signup.
WHOIS / RDAP Domain Lookup
Free RDAP-based WHOIS lookup — registrar, registration date, expiry, name servers, abuse contacts. No API keys, no signup.
llms.txt Generator
Generate an llms.txt file for your site so ChatGPT, Claude, Perplexity and Cursor can find your best content. Auto-build from your sitemap, or write it by hand.
Word Counter
Count words and characters instantly
Case Converter
Convert text into different case styles
Character Counter
Count characters, words, sentences and readability with social media limits
Text Compare
Compare two texts side by side and highlight every difference instantly
Lorem Ipsum Generator
Generate placeholder text
Markdown to HTML
Convert markdown into HTML
Slug Generator & Diacritics Stripper
Bulk slug generator — paste 1 or 1,000 titles, get clean URL slugs with 12 transliteration schemes (Latin, Cyrillic, Greek, Arabic, Chinese pinyin, German umlauts).
Bulk Email Validator
Validate email addresses with 8 layers — RFC 5322 syntax, live MX lookup, SPF, DMARC, 750+ disposable domains, role detection, typo correction. Score 0–100 per email.
DNS Health Checker
Full DNS audit — checks A, AAAA, MX, NS, SPF, DMARC, DKIM, CAA, CNAME and SOA records. Live checks via Cloudflare. Health grade A+ to F with per-issue fix guidance.
SKILL.md Validator
Validate Agent Skills YAML frontmatter, required fields, naming rules and an optional parent-directory match locally.
MCP Tool Schema Checker
Check MCP tool definitions and input/output JSON Schema structure locally, with errors and explicit limits.
MCP Configuration Linter
Lint core MCP server configuration fields locally for portable mcpServers and VS Code servers JSON.
JSON Formatter
Format and validate JSON
Base64 Encoder Decoder
Encode and decode Base64
CSS Gradient Generator
Generate CSS gradients visually
Password Generator
Generate strong passwords
QR Code Generator
Create QR codes instantly
JWT Decoder & Verifier
Decode any JSON Web Token, validate the signature (HS256, HS384, HS512, RS256) with your secret or public key. 100% client-side — your tokens never leave the browser.
cURL to Code Converter
Paste any cURL command — get equivalent code in fetch, axios, Python requests, Go, PHP, Ruby, Node http, Java OkHttp, .NET HttpClient and Rust reqwest. All client-side.
Regex Tester & Cheatsheet
Test JavaScript/PCRE regex live — see all matches, capture groups, replacement preview, full cheatsheet and common-pattern library. No paywall, no ads.
Data Format Converter
Bidirectional converter for CSV, JSON, YAML, TOML, XML and SQL INSERT statements. Drag a file or paste — switch formats instantly. Pure client-side.
Crontab Builder & Decoder
Build cron expressions visually, or paste any cron and get plain-English explanation + next 10 run times. Supports Vixie, Quartz, AWS and Kubernetes formats.
Timestamp & Timezone Converter
Convert Unix epoch ↔ ISO 8601 ↔ human-readable in any timezone. Includes a meeting planner that shows the same instant across up to 8 cities.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512 and HMAC hashes for any text or file — using Web Crypto API. Browser-side, your data never uploads.
UUID, ULID & NanoID Generator
Bulk-generate UUID v1/v4/v7, ULIDs, NanoIDs and Snowflake IDs — copy as JSON, CSV, SQL INSERT or plain list. 1 to 10,000 at once.
HTTP Status Codes Reference
Searchable database of every HTTP status code (100–599) with plain-English meanings, examples, retry strategies and RFC links. Daily reference for devs.
Cursor Rules & AGENTS.md Generator
Build a .cursorrules, AGENTS.md, .windsurfrules, CLAUDE.md or copilot-instructions.md file from a guided form — tell your AI coding assistant your stack and conventions.
Content Structure Checklist
Review content structure with an editorial checklist; not an AI citation prediction
SaaS Ghost Calculator
Calculate hidden SaaS costs
SaaS Free Tier Stack Builder
Build your complete startup tech stack using only free tier tools
Content Repurposing Multiplier
Turn one piece of content into multiple formats
Programmatic SEO Generator
Generate scalable SEO templates
Vibe Coding Stack Suggester
Suggest the best modern development stack
AI Token Counter & Cost Estimator
Rough text-token estimates and sourced costs for three selected Claude API models; no paid API calls
LLM Pricing Comparison
Compare standard token costs for three selected Claude API models; dated source, not a full market comparison
Image Compressor (WebP/AVIF)
Resize and convert up to 20 images locally. Compare actual file sizes; output formats depend on browser encoding support.
PDF Toolkit
Merge PDFs in your chosen file order, extract page ranges, and convert JPG/PNG images to PDF locally. No watermarks or signup.
Image EXIF Viewer & Stripper
Inspect supported EXIF tags and export browser-decodable images as PNG without copying source metadata. Local processing; review visible identifying details.
Featured Tools
Browse all →How FreeAIToolz Works
Three steps to get the results you need — no friction, no signup.
Choose a Tool
Select from AI writing, SEO, text utilities or developer tools.
Enter Your Content
Paste your text or fill in the required fields in seconds.
Get Results Instantly
Results appear immediately in your browser. Copy and use.
Privacy First
Processing explained per tool
Instant Results
Browser-based speed
Unlimited Use
Tool-specific input limits
No Signup
Use immediately
What is FreeAIToolz?
FreeAIToolz is a free online AI tools directory offering 59+ browser-based utilities across 7 categories — AI writing, SEO optimization, text utilities, developer tools, business tools, and AI strategy tools. Browser utilities run locally; hosted checks use servers and may have usage limits. We are not currently offering paid plans. The platform is built and maintained by AI2Flows, a digital AI automation agency.
Tool Categories
Total Free Tools
59+ browser-based AI tools available with no signup required
Categories
7 tool categories spanning AI writing, SEO, text, developer, business and strategy
Data Privacy
Browser tools process locally; hosted and AI features send inputs to servers or providers.
Cost
Free tools with clearly stated input and usage limits.
AI Models Used
Powered by Claude (Anthropic) and GPT-4.1-mini (OpenAI) for AI-powered tools
Compatibility
Works on all modern browsers — Chrome, Firefox, Safari, Edge
Who Uses FreeAIToolz?
FreeAIToolz is used by content writers who need to humanize AI-generated drafts before publishing, SEO specialists who need quick meta descriptions and schema markup, developers who need JSON formatters and Base64 encoders, startup founders researching free SaaS tech stacks, and marketers optimizing content for Google AI Overviews and Perplexity citations. All tools are designed for immediate use — no onboarding, no tutorials required.
Is FreeAIToolz completely free?
Our available tools are free to use. Browser utilities run locally, and hosted checks have fair usage limits. Input and daily limits are shown on the relevant tool.
Does FreeAIToolz store user data?
Browser-only tools process locally. Hosted tools send inputs to our servers and, where applicable, AI providers. Some results are temporarily cached; saved audits and account features can retain records. See the privacy policy and tool details.
What AI models power the FreeAIToolz tools?
FreeAIToolz uses Claude by Anthropic for heavy AI writing tasks like text humanization and paraphrasing, and GPT-4.1-mini by OpenAI for lighter tasks like meta description generation, email writing, and content analysis.