https://majestic.com/
SEO Backlink Checker & Link Building Toolset | Majestic.com
Develop backlink strategies with our Link Intelligence data, build the strongest SEO backlink campaigns to drive organic traffic and boost your rankings today.
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https://www.copyscape.com/
Copyscape Plagiarism Checker - Duplicate Content Detection Software
Copyscape is a free plagiarism checker. The software lets you detect duplicate content and check if your text is original.
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https://coin-identifier.com/
Coin Identifier and Value Checker App - Identify Rare Coins Online by Phone - Coin ID Scanner
Identify coins and check value easily with Coin ID Scanner - the best free coin identifier app. Scan coins online by phone, including rare and foreign coins.
https://gptzero.me/
AI Detector - Free AI Checker for ChatGPT, GPT-5 & Gemini
Best free AI detector - simply paste your text to instantly get an overall AI score and advanced sentence by sentence detection.
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https://languagetool.org/
Free AI Grammar Checker - LanguageTool
Instantly check grammar, punctuation, and spelling errors with LanguageTool's AI-powered grammar checker. Enhance your writing in over 30 languages with ease.
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https://pcprofile.com/
Can I Run It? Free PC Game Compatibility Checker | PCProfile
Jul 17, 2026 - Check if your PC can run a game. Compare your GPU and CPU to official system requirements for a settings tier and an estimated FPS. Free, no install.
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https://www.fca.org.uk/consumers/fca-firm-checker
FCA Firm Checker | FCA
Use the FCA Firm Checker to find out if financial services firms are authorised by us and have our permission to sell you products and services.
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https://www.healthychildren.org/English/tips-tools/Symptom-Checker/Pages/default.aspx
Symptom Checker - HealthyChildren.org
HealthyChildren.org - Powered by pediatricians. Trusted by parents.
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https://webaim.org/resources/contrastchecker/
WebAIM: Contrast Checker
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https://ahrefs.com/website-authority-checker
Website Authority Checker: Check the "Authority" Of Any Domain
Free tool to check the
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https://monopoly-authenticity-checker.com/
Monopoly-Authenticity-Checker.com – autograph authentication
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https://smallseotools.com/plagiarism-checker/
Plagiarism Checker - Check Originality, Similarity & Sources
Use our plagiarism checker to detect plagiarism in essays, articles, and assignments. Get a 100% accurate report with matched sources.
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https://sitecheck.sucuri.net/
Website Security Checker | Malware Scan | Sucuri SiteCheck
SiteCheck is a website security scanner that checks any site, link, or URL for malware, viruses, blacklist status, seo spam, or malicious code. Check your...
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https://www.zerogpt.com/
AI Detector - Trusted AI Checker for ChatGPT, GPT5 & Gemini
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https://originality.ai/
AI Detector - Accurate AI Checker for ChatGPT, GPT-5 & Gemini
Use the accurate Originality.ai AI detector to identify if text was generated from a popular AI platform like ChatGPT, Gemini, Claude, Grok and others.
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https://rankchecker.io/
RankChecker.io - Accurate & Reliable Free Keyword Rank Checker
Jan 19, 2023 - Rank Checker: Get accurate keyword ranking data with our free tool. Use our data for better SEO decisions and improved Google visibility.
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https://ahrefs.com/backlink-checker
Free Backlink Checker by Ahrefs: Check Backlinks to Any Site
With the world's biggest index of live backlinks (over 15 trillion), Ahrefs Backlink Checker will show you the most complete backlink profile for any website.
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https://patient.info/
Patient.info: Health Information and Symptom Checker
Healthcare information and symptom checker for patients and professionals. Book your GP appointment or order your medication online with Patient.
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https://validator.w3.org/nu/
Ready to check - Nu Html Checker
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https://originalitychecker.org/
Originality AI Checker — Free AI Detection, No Sign-Up Required
Jun 30, 2026 - Free originality AI checker with sentence-level detection. Is Originality.ai accurate? Try our free alternative — no account, no trial needed.
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https://odds.online/
Betting Odds Checker | All Sports Betting Odds Online
Apr 28, 2026 - Odds.Online Is a One Stop Website For Betting Odds. All Sports Betting Odds Online + Betting Sites and Bookmakers Odds Checker.
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https://www.3xxredirects.com/
HTTP Status & Redirects Checker, Free Online URL Redirect Tracer | 3xxRedirects
Free online HTTP redirect checker. Trace 301, 302, 307, 308 redirects, inspect response headers, SSL certificates, and the full redirect chain of any URL.
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https://checkerbrand.com/
Checker The Originals®
Checker The Originals®
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https://journalcheckertool.org/
Journal Checker Tool: Check which publishing options are supported by your funder’s OA policy |
JCT enables researchers to check whether they can comply with their funders Plan S aligned OA policy based on the journal, the funder and the institution...
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https://www.security.org/how-secure-is-my-password/
How Secure Is My Password? | Password Strength Checker | Security.org
Apr 22, 2026 - Check how secure your password is using our free online tool. How long would it take a supercomputer to crack your password?
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https://aitextdetector.net/
AI Text Detector - Free AI Checker for ChatGPT Detection | Accurate AI Content Check
AI Text Detector offers a free and accurate AI detection tool to identify whether texts are generated by AI models such as ChatGPT, Claude, Grok, Llama, and...
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https://moz.com/link-explorer
Free Backlink Checker - Moz Link Explorer - Moz
Aug 5, 2025 - Discover link opportunities and monitor link building efforts with Moz Link Explorer. This free backlink checker provides easy access to Domain Authority, Page...
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https://tools.krtitech.com/
Website SEO Score Checker | Analyze Your Website's SEO...
Easily analyze your website's SEO performance with our Website SEO Score Checker. Get insights to boost your search engine rankings and online visibility.
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https://www.redirectchecker.org/
Free Redirect Checker - Analyze URL Redirects, SEO & Security - redirectchecker.org
Advanced redirect checker tool to analyze URL redirect chains, HTTP headers, SSL certificates, SEO impact, and security headers. Free online tool for...
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https://www.serpchecking.com/
SERP Checker: Google SERP Analysis Tool | SERP Checking
Analyze SERPs with our SERP checker by country, device, and language. Covers rankings and SERP features with structured JSON output.
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https://rank-checker.nl/
Rank Checker | Online Marketing Tool
Ontdek de kracht van SEO met Rank-Checker.nl. Verbeter uw websiteverkeer en zichtbaarheid op zoekmachines. Lees onze inleiding voor meer informatie.
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https://flow.org/
Flow: A Static Type Checker for JavaScript | Flow
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https://www.quetext.com/
Plagiarism Checker & AI Detector by Quetext
Plagiarism Checker and AI Detector by Quetext. Our DeepSearch™ technology searches billions of sources to detect plagiarism and AI-written content.
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https://aiscan24.com/
Free AI Detector, Checker, Scanner – No Sign-Up Required
Instantly check text for AI-generated content made by ChatGPT or other LLMs with our free AI detector. No sign-up, no email, just quick, accurate results.
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https://down-today.com/
Down-Today.com | Real-Time Status Checker & Updates
Check if a website is down in real-time. Get instant updates on outages, service disruptions, and troubleshooting tips. Stay informed about a website's current...
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https://www.deadlinkchecker.com/
Free Broken Link Checking Tool - Dead Link Checker
Check for broken links on your website with our free online tool. Sign up to schedule automatic checks - keep your website fresh and boost SEO.
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https://www.pangram.com/
AI Detector — Verified AI Content Checker | Pangram
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https://websiteseochecker.pro/
Free DA PA Checker - Domain Authority & SEO Analysis Tool
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https://www.freeformatter.com/hmac-generator.html
Free Online HMAC Generator / Checker Tool (MD5, SHA-256, SHA-512) - FreeFormatter.com
This free online tool let's you compute a HMAC using your desired algorithm, for example MD5 or SHA-256 and many others
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https://www.mailgenius.com/
Mail Tester – Free Email Deliverability & Spam Checker | MailGenius
Apr 9, 2026 - Stop landing in Spam or Promotions. Get 3 free email deliverability tests to find spam triggers, email authentication issues, and inbox placement problems.
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https://www.honda.ca/en/recalls
Honda Recall Checker: Safety Recalls & Product Updates | Honda Canada
We want everyone to be safe. Use this tool to check if your vehicle has any current recalls by entering your VIN. Parts and services for this recall are on us.
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https://smodin.io/ai-content-detector
AI Detector - Accurate AI Checker for ChatGPT, GPT-5 & Gemini
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https://ahrefs.com/broken-link-checker
Free Broken Link Checker - Dead Link Checking Tool by Ahrefs
Check any website or webpage for broken links in seconds. Find dead internal and external backlinks. No signup or download required
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https://www.broadbandspeedtest.org.uk/
Broadband Speed Test | Speed Checker by BroadbandUK
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https://plagiarismdetector.net/
Plagiarism Checker Free | MOST Accurate with Percentage ✅
Plagiarism checker is free and accurately detects copyright content (text) from assignments or Documents with 0$ cost and ONE-click essay checker.
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https://www.healthychildren.org/English/tips-tools/symptom-checker/Pages/default.aspx
Symptom Checker - HealthyChildren.org
HealthyChildren.org - Powered by pediatricians. Trusted by parents.
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https://plagiarisma.net/
Plagiarism Checker — Free Online Accuracy Check | Plagiarisma
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https://indexchecker.io/
Bulk Google Index Checker
Mar 29, 2026 - Use our Free Bulk Google Index Checker to instantly verify which pages are indexed. Fast, accurate, and perfect for SEO audits and bulk URL checks.
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https://www.aiornot.com/
AI Detector - AI Checker for text, image, music & video
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https://app.ithenticate.com/en_us/login
Log In - Sign on to your plagiarism checker account | iThenticate
Log in to your iThenticate plagiarism detection software account.
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https://csgorankings.com/
CS:GO Rankings, Stats, Tracker and Rank checker
Find your CS:GO rank and track your CS:GO matchmaking stats in depth. Check your global, country and regional CS:GO rankings based on your in-game skill.
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https://nl.majestic.com/
SEO Backlink Checker & Link Building Toolset | Majestic.com
Ontwikkel backlinkstrategieën met onze Link Intelligence data, bouw de sterkste SEO backlinkcampagnes om organisch verkeer te genereren en geef uw scores...
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https://seochecker1.com/
SEO Checker - Comprehensive SEO Analysis Platform
Professional SEO analysis tool with site audits, keyword research, backlink analysis, and rank tracking powered by DataForSEO.
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https://bonpatron.com/
"BonPatron" Online Spelling and Grammar Checker for French as a Second Language
BonPatron is a grammar checker that finds common spelling errors and grammatical mistakes in French.
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https://www.drlinkcheck.com/
Broken Link Checker – Dr. Link Check
Easily check your website for broken and malicious links. Find and fix 404 errors, mistyped URLs, invalid SSL certificates, or links to questionable websites.
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https://dnsblchecker.com/
DNSBL Checker
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https://seooptimizer.me/
SEO Optimizer | SEO Analyzer | SEO Checker
SEO Analyzer or SEOOptimizer helps to analyze and identify your website SEO issues and optimize your web page contents in order to rank better on search...
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https://www.codecademy.com/catalog/language/html-css
Checker Dense
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https://pyrefly.org/
Pyrefly: A Fast Python Type Checker and Language Server | Pyrefly
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https://www.cookieserve.com/
Cookieserve - Free online cookie checker for websites
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https://aigrammarchecker.org/
AI Grammar Checker | Free Online Grammar & Punctuation Tool
Apr 15, 2026 - Instantly fix grammar, punctuation, and spelling errors with AI Grammar Checker. Improve your writing clarity and style for free with advanced AI technology.
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https://batchcodechecker.org/
Batch Code Checker[Updated 2026]-Check Fresh of Cosmetics
Caculate the manufacturing date of Perfumes、fragrance and cosmetics from the batch code. Check the product is fresh and usable!
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https://checkcosmetic.online/
Cosmetic Batch Code Checker && Check Fresh[Update 2026]
Check Cosmetic provides perfume,fragrance and cosmetics batch code decoder and expiry date caculator,covering 700+ brands,Check Fresh cosmetic and perfume...
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https://www.iban.com/iban-checker
IBAN Checker: Validate & Check IBAN Number for Errors
Validate and verify the correctness of the entered IBAN (international bank account number) online. Check IBAN number for errors at IBAN.com
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https://www.seobility.net/en/seocheck/
SEO Checker | Test your website for free with Seobility
Jan 30, 2026 - Instantly review your website for free with the SEO checker from Seobility and get tips for a better search engine optimization and higher rankings.
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https://www.ssl.org/
SSL Checker
Jun 1, 2026 - Check SSL certificate information
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https://interaccioneshiv.huesped.org.ar/
Interactions Checker
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https://www.editpad.org/tool/plagiarism-checker
Plagiarism Checker - Check 5000, 10000 & 15000 Words
Editpad Plagiarism Checker is a freemium tool to detect duplicate content in your content. Accurate plagiarism detector tool for students and teachers.
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https://keyworddensitycheckertool.com/
Keyword Density Tool for SEO - Keyword Density Checker Tool | Blue Pencil
Jun 17, 2026 - Use this keyword density tool to check word count, phrase frequency and repetition risk, then fix forced keyword use before you publish SEO copy.
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https://www.waecdirect.org/
WAECDIRECT ONLINE - RESULT CHECKER
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https://www.brokenlinkcheck.com/
Free Broken Link Checker - Online Dead Link Checking Tool
Free Broken Link Checker finds dead links on any website in minutes. This is an online tool with no sign-up or downloads. Advanced services are available.
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https://unspam.email/
Free Email Spam Checker: Spam Test & Spam Score
Run a free spam test and get your spam score in 30 seconds. Check SPF, DKIM, DMARC, and blacklists with a full email deliverability test, before you send.
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https://hostingchecker.info/
Hosting-Checker: Wer hostet meine Website?
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https://writewithharper.com/
Harper | Privacy-First Offline Grammar Checker for Developers & Writers
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https://www.linkpreview.app/
Link Preview, Meta Tag checker and Open Graph tool
Preview any URL’s Open Graph tags, meta title, description, social image, favicon, and link previews in one free checker.
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https://headingchecker.dev/
Heading Checker AI Agent
Check page headings, H1 usage, heading order, duplicate titles, missing sections, and SEO structure for cleaner content.
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https://plagiarismly.com/
Plagiarism Checker - Fast, Accurate & 100% Reliable
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https://smodin.io/
Smodin - AI Writing Assistant & Plagiarism Checker
Smodin helps you write, rewrite, humanize AI text, and check for plagiarism.
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https://virtualwritingtutor.com/
Grammar Check - Free Essay Checker | Virtual Writing Tutor
Correct your English writing with virtualwritingtutor.com - the best grammar checker, sentence checker, essay checker, punctuation checker and spell checker...
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https://dnsmap.io/
DNSMap - Worldwide DNS Propagation Checker - Global test
Check the current IP of your domain name or hostname from multiple DNS nameservers and resolvers from all around the world. Instant propagation check.
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https://checkseorank.com/
Free Domain Authority Checker - Check DA, PA & SEO Metrics
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https://minechecker.com/
Minecraft Server Status Checker | Java/Bedrock | MineChecker
Check with MineChecker, the leading Minecraft server status checker, to instantly check Minecraft server status. Monitor uptime, player counts, and latency for...
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https://www.checkforplag.com/
Plagiarism Checker | Hindi Plagiarism | CFP | Copy Check
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https://www.iban.co.no/
IBAN Checker: International Bank Account Number validering
IBAN checker er en programvare designet for å validere et International Bank Account Number og identifisere banken som eier kontoen, BIC kode og adresse.
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https://www.proofig.com/
Image Integrity & Image Plagiarism Checker for Research | Proofig AI
Jun 1, 2026 - Proofig AI ensures Image Integrity with a high-precision AI image detector that identifies image manipulation, duplication, and works as an advanced Image...
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https://www.broadbandspeedchecker.co.uk/
Broadband Speed Checker - UK's No.1 Broadband Speed Test
Check your broadband speed test using our easy and accurate broadband speed checker.
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https://citely.ai/
AI Citation Checker & Source Finder — 160M+ Papers | Citely
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https://sahildigitalsolutions.com/
Free Local SEO Checker | Sahil Digital Solutions
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https://apps.apple.com/us/app/plagiarism-checker-prepostseo/id1463941368
Plagiarism Checker -Prepostseo App - App Store
Download Plagiarism Checker -Prepostseo by Clixade Ltd on the App Store. See screenshots, ratings and reviews, user tips, and more apps like Plagiarism Checker…
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https://pro.spanishchecker.com/
"SpanishChecker" Online Spelling and Grammar Checker for Spanish as a Second Language
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https://linguix.com/
Linguix — Grammar Checker and AI Writing App
Supercharge Your Written Communication with AI. Make your texts grammatically correct, clear, and highly effective on any website for free.
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https://pro.spellcheckplus.com/
"SpellCheckPlus" Online Spelling and Grammar Checker for English as a Second Language
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https://mail7.net/
Email Checker - Free Email Validator Tool | Mail7.net
Jul 31, 2025 - Mail7.net is a Email Checker. Free email validator tool for single and bulk email validation. Check if email address is valid with MX records and SMTP...
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https://aiqualityhq.com/
AIQualityHQ — Free AI Prompt Quality Checker & LLM Tool Suite
Free AI prompt quality checker and LLM tool suite. Generate system prompts, optimize prompt length, scan for prompt injection attacks, and audit AI test...
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https://top100serps.com/
Top 100 Google Results SERP Rank Checker | Top100SERPs
Enter a keyword, choose a country and device, and view the top 100 Google results (SERPS). Free to browse. Sequential 1–100 list with optional absolute (“abs”)...
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https://smallseotools.com/domain-authority-checker/
Domain Authority Checker - DA PA Checker for Bulk URLs
Domain Authority or DA PA Checker is a tool to Check website moz Domain Authority. Just enter your website url and see domain authority of any domain name.
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https://www.serprobot.com/serp-check
FREE Google SERP checker - google ranking check - serprobot.com
Free SERP check, track and monitor your search engine keyword ranking quickly and accurately
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https://www.ipqualityscore.com/threat-feeds/malicious-url-scanner
Malicious URL Scanner | Scan URLs for Malware | URL Checker
Scan URLs for malware and phishing with our free malicious URL scanner. Check links in real-time to detect suspicious domains and prevent cyber threats.
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https://bcrypt-generator.com/
Bcrypt Generator - Online Hash Generator and Checker
Free online bcrypt hash generator and verifier. Create secure password hashes with adjustable rounds. Client-side processing ensures your data stays private.
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https://www.sondrakistan.com/
Sondrakistan Coin - Coin Value App | Coin Value Checker | Coin Scanner
Coin Value App | Coin Value Checker | Coin Scanner
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