IPFS CID checker
An IPFS CID is a multibase-encoded multihash. This tool checks the form (v0 starts with Qm and is 46 chars; v1 starts with bafy/bafk/bafz/bafu and is base32).
Result will appear here.
FAQ
Does this fetch the content?
No — it only validates the CID format. Resolving requires an IPFS gateway or node, not a static page.
What's a CIDv0 vs CIDv1?
v0 is the legacy form: Qm + base58btc multihash. v1 is multibase + multicodec + multihash, and supports algorithms beyond sha2-256.
Why isn't my v1 CID validating?
Some valid v1 CIDs use bases other than base32. This tool focuses on the common base32 form (b...). Try a CID inspector for exotic bases.
Where might I see a CID in email?
Crypto / NFT receipts, decentralized signing receipts, and a few Web3 newsletter platforms embed CIDs in email bodies.