🔐 Verify Content Against Known Hash
Paste the expected SHA-512 hash and provide the content. The decoder will re-compute the hash locally and tell you if it matches.
Drop a file here or click to select
— or paste text content —
🧮 Compute SHA-512 Hash
Hash any file or text to get its SHA-512 content address. This creates the number that IS the data's permanent identity.
Drop a file or click to select
— or paste text —
📦 Decode Base64 Blob
Paste a base64-encoded Shards blob to decode it back to the original file. Verifies the hash after decoding.
💡 Why This Tool Exists
This file is your failsafe. It guarantees that you can always verify and decode any Shards URL/HASH, even if:
- The fileos.cloud server goes down
- The internet is unavailable
- The VPS is decommissioned
- Years have passed
The math doesn't need servers. SHA-512 is a NIST standard (FIPS 180-4) implemented in every modern browser via crypto.subtle.digest('SHA-512', data). This will work as long as web browsers exist.