Free Online Checkers
This checkers collection groups related Fneno utilities so you can find the right tool fast. Everything runs in the browser with a free-first experience.
⭐ Featured tools
All tools in this collection
Broken Link Checker
Scan a page for dead links & status codes
ClaimReview Schema
Fact-check ClaimReview JSON-LD
Company Name Checker China
Free online Company Name Checker China — fast, private browser tool on Fneno.com.
Content Originality Checker & Certificate
Analyze vocabulary diversity and originality — download assessment certificate
CORS Preflight Checker
Test OPTIONS preflight & CORS headers
Credit Card Luhn Validator
Validate card numbers with Luhn algorithm
Detecteur Plagiat Francais
Free online Detecteur Plagiat Francais — fast, private browser tool on Fneno.com.
DMARC Record Checker
Lookup _dmarc TXT for your domain
DNS Lookup Tool
Look up A, MX, CNAME, TXT and more DNS records for any domain
DNS Propagation Checker
Compare A record via Google DNS
Douyin Video Size Checker
Free online Douyin Video Size Checker — fast, private browser tool on Fneno.com.
Email MX Checker
Check domain MX records for email delivery
Email Validator
Syntax check + optional MX lookup
Fapiao Duplicate Checker
Free online Fapiao Duplicate Checker — fast, private browser tool on Fneno.com.
IBAN Validator & Formatter
Validate GCC and international IBANs
ISBN Validator
Validate ISBN-10 and ISBN-13 check digits
Palindrome & Anagram Checker
Check palindromes and anagrams in EN/AR
Password Breach Checker
Check if password appeared in known breaches
Password Strength Checker
Score passwords and get security tips
Permis Points Checker FR
Free online Permis Points Checker FR — fast, private browser tool on Fneno.com.
Plagiarism Checker (AI)
AI originality & similarity review
Port Checker
Check if TCP port is open
Readability Score Checker
Flesch reading ease and grade level
Redirect Chain Analyzer
Trace 301/302 redirects hop by hop
Saudi FATOORA Field Checker
Check ZATCA e-invoice required fields
Saudi National ID Validator
Validate Saudi ID / Iqama number checksum
Saudi Qiwa Contract Checklist
Employment contract compliance checklist KSA
SEO Keyword Density
Keyword density for SEO content
SEO Readiness Checker & Certificate
Score title, meta, headings, and content depth — get SEO readiness certificate
SERP Title Pixel Checker
Check if title fits Google SERP width
Spelling & Grammar Quiz & Certificate
10-question spelling and grammar quiz — Novice to Professional certificate
SPF Record Checker
Verify SPF TXT on your domain
SSL Expiry Checker
Check HTTPS certificate expiry date
SWIFT / BIC Validator
Validate bank SWIFT/BIC codes
Trial Balance Checker
Verify debits equal credits
UAE MOHRE Offer Letter Check
MOHRE offer letter required fields checklist
User-Agent Parser
Detect browser, OS, and device from UA string
WCAG Color Contrast Checker
Check AA/AAA contrast for accessibility
Website SEO Audit & Certificate
Paste any website URL — 13-point SEO audit + official certificate with your link and every finding
Diff Checker
Compare two texts and highlight differences
AI Content Detector
Detect whether content was written by AI or human
AI Content Detector Pro
Deep multi-dimension analysis: entropy, vocabulary diversity, transition patterns & more
Arabic Spell Checker
Fast rule-based Arabic spell check — no AI required
Grammar Checker
Fix grammar and spelling errors with AI precision
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes
About this collection
❓ Frequently Asked Questions
They are free browser tools matched to the checkers intent — open any card below to start.
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Explore more on Fneno
Browse every free tool, multilingual hubs, and language pages — no signup required.