CAR file inspector
A CAR file is a flat archive of IPLD blocks. We parse the varint length prefix, read the header CBOR, and surface the version and root CIDs without uploading anything.
Header info will appear here.
FAQ
Is the file uploaded?
No. We read the first 200KB locally via FileReader. Nothing leaves your browser.
What's a varint length prefix?
CAR files use unsigned LEB128 varints to encode lengths. Each byte holds 7 bits of value plus a continuation bit.
Does this parse all CBOR roots?
Not fully — we surface the version and root key occurrences. A full IPLD parser is out of scope for a static tool.
Where would I get a CAR file?
From IPFS export commands (`ipfs dag export`), Filecoin storage receipts, or web3.storage uploads.