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Free Backlink Checker & Link Analysis

Discover who links to any website using CommonCrawl's 2.3 billion page index, Google link: search, and Moz DA/PA metrics. Identify toxic backlinks with 8 pattern-based detection rules — all without expensive subscriptions.

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What's Inside

CommonCrawl Discovery

Search CommonCrawl's index of 2.3 billion web pages to find backlinks pointing to any domain. Updated monthly with the latest crawl data. No API key required.

Moz DA/PA Metrics

Optional Moz integration shows Domain Authority (0-100), Page Authority, linking domain count, total backlinks, and spam score for any URL. Requires Moz API key ($5/month).

Toxic Link Detection

8 pattern-based rules flag potentially harmful backlinks: thin content sites, link farms, foreign language spam, paid link directories, PBN patterns, and more.

Google Link Search

Uses Google's link: operator as an additional discovery method. Combines three data sources for comprehensive backlink coverage.

Frequently Asked Questions

How does Simfal find backlinks?
Simfal uses three sources: CommonCrawl's open index of 2.3 billion web pages (free, no key needed), Google's link: search operator (free), and optionally Moz's API for Domain Authority and Page Authority metrics ($5/month).
How current is the backlink data?
CommonCrawl releases new crawl data monthly. The current index is CC-MAIN-2026-08 from March 2026. Google link: search provides near-real-time results. Moz metrics update weekly.
Can Simfal detect toxic backlinks?
Yes. Simfal applies 8 pattern-based rules to flag potentially harmful links: thin content sites, link farms, foreign language spam, paid directories, PBN patterns, excessive exact-match anchors, and more.

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