NFT Autofill Extractor

WHAT IT DOES

NFT Autofill Extractor is a developer-focused tool that extracts metadata from NFT collections for use in form autofill, data analysis, or integration projects. Enter a contract address, and the tool scans the first N tokens (configurable up to 50), fetches each token's URI, resolves the metadata from IPFS or HTTP endpoints, and parses the attributes. The extracted data is displayed in a structured table showing token ID, owner address, token URI, and a human-readable list of traits and their values. This is particularly useful for developers building NFT-related applications who need sample data, or for users who want to quickly understand a collection's trait structure without manual inspection.

HOW TO USE

Connect your wallet using the BGWallet bridge (MetaMask or any Web3 wallet). Ensure you are on the same network as the NFT collection — Ethereum, BNB Chain, Polygon, Arbitrum, Optimism, Base, or any EVM chain. Enter the NFT contract address in the input field. Set the number of tokens to scan (1-50) — this controls how many token IDs from the start of the collection will be extracted. Click "Extract metadata" to start the process. The tool fetches the tokenURI for each token, resolves the metadata from the URI (handling IPFS via public gateway), and parses the attributes. Results are displayed with the collection name, symbol, total supply, and a table with token details and extracted traits.

TECHNICAL MECHANISM

The tool uses the ERC-721 standard interface to read tokenURI(uint256 tokenId) for each token ID in sequence starting from 1. It first reads the collection's name, symbol, and totalSupply using the standard view functions. For each token, it calls tokenURI() to get the metadata URI, which may be an IPFS link (ipfs://) or an HTTP URL. If IPFS, the tool converts it to an HTTP gateway URL (https://ipfs.io/ipfs/) to fetch the content. It then fetches the metadata JSON with a 10-second timeout to avoid hanging on slow gateways. The JSON is parsed, and the attributes array is extracted — supporting both the OpenSea standard (trait_type, value) and alternative formats (traitType, value). The tool also fetches the owner of each token using ownerOf() to provide ownership context. All fetched data is displayed in a table format suitable for copy-pasting or manual review. The tool does not store any data — all reads happen live through your wallet provider and gateway requests.

WHAT IT CANNOT SEE

The tool cannot extract metadata from collections that use dynamic or randomized URIs that change per view (e.g., time-based metadata or user-specific URIs). It cannot verify the authenticity or accuracy of extracted attributes — it presents the data as-is from the metadata JSON without validation. It cannot handle collections with large metadata files (e.g., high-resolution images encoded as base64) or extremely slow IPFS gateways, which may cause timeouts. It cannot extract data from collections that require authentication tokens, API keys, or session cookies to access metadata. It cannot extract metadata from ERC-1155 collections. It cannot display images or animations — only text-based attributes. It cannot detect if the metadata has been modified after minting. The tool is read-only and does not sign any transactions.

PLEASE NOTE

This tool works exclusively on EVM-compatible chains (Ethereum, BNB Chain, Polygon, Arbitrum, Optimism, Base, Avalanche C-Chain, Fantom, and others). Solana, Tron, Starknet, SUI, TON, Aptos, Bitcoin, Cosmos, and XRP are not supported. The tool only supports ERC-721 NFT collections — ERC-1155 is not supported. Metadata fetching depends on IPFS gateway availability and response times; some collections may fail to resolve if the gateway is slow or the IPFS content is no longer pinned. The tool uses the public IPFS gateway which may have rate limits. The tool does not store any data — all reads happen live. The tool is provided as-is with no warranty or liability. Always verify contract addresses from trusted sources.