Look-Alike Address Detector

WHAT IT DOES

Look-Alike Address Detector is a DeFi security tool that watches the page for Ethereum addresses (0x + 40 hex chars), then compares each address against the user's connected wallet address and saved address book using multiple similarity algorithms (Levenshtein distance, Jaccard similarity, and character-level n-gram analysis) to detect look-alike addresses. It scans the page for address patterns, compares each address against known addresses using three complementary algorithms, calculates a weighted similarity score, identifies specific character differences, and displays a visual warning overlay (high/medium/low risk) next to addresses that are visually similar to known addresses, with the similarity score and the specific differences highlighted.

WHERE IT RUNS

This tool operates as a panel within the BotGentz browser extension, available for Chrome, Firefox, Edge, and Brave. It works on any webpage displaying Ethereum addresses, such as DEX interfaces, wallet applications, transfer forms, block explorers, and DeFi dashboard sites.

HOW TO USE

Navigate to any page that displays Ethereum addresses. Open the BotGentz extension and select Look-Alike Address Detector from the tool menu. The panel will appear on the side of your browser. Click the "Connect Wallet" button to connect your EVM wallet (MetaMask or compatible). Click the "Scan & Detect" button to detect addresses on the page and analyze them for look-alike risks. The tool will overlay a color-coded badge (red for high risk, orange for medium, yellow for low) next to addresses that are visually similar to known addresses, with a tooltip showing the similarity score and specific character differences. You can customize the similarity threshold, maintain an address book, and ignore specific addresses. Use the "Clear Badges" button to remove all overlays.

TECHNICAL SECTION — MULTI-ALGORITHM SIMILARITY DETECTION

This tool uses a three-algorithm approach to detect look-alike addresses. First, it scans the page DOM for Ethereum address patterns and deduplicates found addresses. Second, it builds a list of known addresses from the connected wallet and saved address book. Third, it applies the Levenshtein distance algorithm to calculate the edit distance between addresses, normalized by the maximum length, providing a baseline similarity measure. Fourth, it applies the Jaccard similarity algorithm to compare character sets, detecting addresses that share a high proportion of unique characters. Fifth, it applies character-level n-gram analysis (using 3-grams) to capture local character patterns and detect structural similarities. Sixth, these three scores are combined with weights (50% Levenshtein, 30% Jaccard, 20% n-gram) to produce a final similarity score. Seventh, it identifies specific character differences between similar addresses, highlighting them for user visibility. Eighth, it queries the chain for address metadata (balance, transaction count, code) to differentiate legitimate contracts from suspicious addresses. Finally, it overlays a color-coded badge on the page next to each address with a tooltip showing the similarity score and specific character differences, providing immediate visual feedback about look-alike risks.

THE PANEL

The side panel is designed for seamless integration into your browsing workflow. You can drag it to either side of the window, and it remembers your preferred position per website. It supports snap-to-edge behavior and can be collapsed to a small tab for minimal distraction. The panel is resizable horizontally and vertically, with a minimum width of 280px and maximum of 600px. Pressing the Escape key closes the panel. All settings are saved locally.

PLEASE NOTE

This tool requires the free BotGentz extension and a real EVM wallet extension (such as MetaMask) already installed in your browser. It works with EVM-compatible chains (Ethereum, Polygon, Arbitrum, Optimism, etc.). Cannot detect all look-alike addresses; relies on known addresses for comparison. Some legitimate addresses may appear similar. Cannot detect addresses not displayed on the page. Does not guarantee safety. Websites change their page formats frequently, and extraction scripts may need periodic updates. This tool does not store or transmit page content except for the address queries sent to the EVM network. No browsing history or personal data is collected or retained.