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NFT Metadata Validator — ERC-721, OpenSea & Metaplex Preview

Validate NFT metadata against ERC-721, OpenSea, and Solana Metaplex standards. Preview your NFT before minting.

Miễn phí Không cần đăng ký Chạy trên trình duyệt Tôn trọng riêng tư Updated

Preview

Cách dùng

  1. 1 Pick the standard your NFT targets — ERC-721 (Ethereum), OpenSea extended, or Metaplex (Solana).
  2. 2 Paste your metadata JSON into the input panel.
  3. 3 Validation runs instantly. Fix any errors before minting.

Vì sao dùng công cụ này

  • Catches missing required fields, malformed URLs, and non-standard attributes before you mint.
  • OpenSea-style preview card so you see exactly what collectors will see.
  • Supports IPFS CIDs (Qm… and bafy…) with auto-rewrite to a gateway for preview.
  • Runs entirely in your browser — your metadata stays private.
  • Free, no signup.

Câu hỏi thường gặp

Which standards are supported?

ERC-721 (the minimum required fields), OpenSea's extended schema (background_color, animation_url, display_type attributes), and Solana's Metaplex (symbol, properties.files, creators).

Does this guarantee my NFT will appear correctly on OpenSea?

No tool can guarantee that — OpenSea has additional indexing rules and trait normalization. But passing all checks here catches the most common rejection causes.

What about ERC-1155?

ERC-1155 metadata is identical to ERC-721 with optional {id} placeholder in URIs. Use the ERC-721 mode and validate your URI template separately.

Why does my IPFS image not load in the preview?

Cloudflare's public IPFS gateway can be slow or rate-limited for some CIDs. The metadata can still be valid even if the gateway times out.

NFT Metadata Validator là gì?

An NFT Metadata Validator is a tool that checks NFT metadata for conformance to common token standards, including ERC-721, the OpenSea metadata format, and Solana's Metaplex schema. It inspects the metadata's fields and structure, reports issues, and renders a preview of how the NFT would appear before minting. It runs entirely in the browser with no account required.

Tóm tắt

NFT Metadata Validator là công cụ web3 miễn phí của Zerethon Tools. Validate NFT metadata against ERC-721, OpenSea, and Solana Metaplex standards. Preview your NFT before minting. Chạy hoàn toàn trong trình duyệt — không đăng ký, không tải lên.

Danh mục
Web3
Giá
Miễn phí
Quyền riêng tư
Chạy trên trình duyệt
Đăng ký
Không cần

Quyền riêng tư

Dữ liệu của bạn không bao giờ rời khỏi trình duyệt trừ khi được nêu rõ. NFT Metadata Validator chạy hoàn toàn phía client — không tải lên máy chủ, không ghi log, không theo dõi dữ liệu bạn nhập.

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