Bulk Website Malware Checker

Cross-check up to 25 URLs against malware and phishing blocklists in one paste. Flag any site flagged by major safe-browsing sources.

If one of your sites gets flagged for malware, the first hour matters. Google blocks search-result clicks. Chrome and Safari show a red interstitial. Email links stop working. Bulk malware scans let you sweep your whole portfolio at once so you catch a flag the same hour it appears.

## What this tool does

Paste up to 25 URLs. We cross-check each one against the public safe-browsing reputation data our edge function aggregates, plus a quick heuristic scan of the homepage for known compromise patterns. Each row gets a safe/flagged verdict with the flag type.

## What this is not

This is a reputation and heuristic check — not an antivirus scanner. It catches sites that have already been listed by major safe-browsing sources, plus a few obvious tampering patterns. For deep file-system scans, you need a server-side antivirus on the origin.

What this tool checks

• Cross-check against public safe-browsing blocklists
• Per-URL safe / flagged verdict
• Type of flag (malware, phishing, deceptive)
• Recent suspicious-content heuristics

Why it matters

A site flagged for malware loses all SEO value and most direct traffic instantly. Browsers show a full red interstitial. Catching a flag before clients do is a 24-hour difference, not a 24-week one.

How to fix what it finds

• Any "Flagged" row is a priority — open the single-URL Malware Checker for the exact reason
• If your site is flagged but you see no infection, request a review via Google Search Console
• If your site IS infected, take it offline, scan the file system, restore from a clean backup, then request unflagging
• Add active malware monitoring to LemWatch so future flags trigger an instant alert

Methodology

For each URL we extract the hostname and query public safe-browsing reputation data via our backend. We also fetch the homepage and look for a small set of known compromise patterns: pharmaceutical spam keywords, hidden injected iframes, base64-obfuscated script tags pointing at suspicious hosts, and unexpected redirects to gambling/adult domains. The verdict is 'flagged' if any of these match; otherwise 'safe'. False positives are possible — always confirm in the single-URL tool before acting.

Frequently asked questions

How is this different from running Google Safe Browsing manually?

It bundles multiple reputation sources and adds a quick on-page heuristic scan — and lets you do it for 25 URLs at once.

Can it detect a brand-new infection?

Only if the infection trips one of the heuristic patterns or has been picked up by a reputation source. Very fresh infections (within minutes) may be missed — that is why continuous monitoring matters.

My site says "Flagged" but I see no problem — what do I do?

Open the row in the single-URL Malware Checker for the specific reason, then cross-check with Google Search Console.

Does it scan the file system?

No — this is a remote check. For file-system scans you need a server-side AV on the origin.

How often is the blocklist data refreshed?

Every few hours. For real-time monitoring with instant alerts, sign up for LemWatch.

Can it check subdomains separately?

Yes — subdomain reputation is checked independently of the apex.