Procedure · split

Split a secret.

Your secret is processed locally in this browser. Configure the threshold, label the holders, and generate shards in a single ceremony.

Your secret is processed locally in this browser. It is never sent to Shards.
For high-value secrets, disconnect from the internet after this page loads. The full app is cached and continues to function offline.
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Enter your secret

local only
Seed phrase
Private key
Password
Recovery code
Other text
78 / 4,096 characters · 12 words detected
Shards does not validate or store this secret. Make sure it is correct before generating shards.
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Choose your recovery threshold

M of N
2-of-3
Simple personal backup.
Recommended
3-of-5
Inheritance & serious personal custody.
5-of-7
Teams, companies, protocols.
Custom
Configure M and N manually.
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Any 3 of 5 shards can recover the secret. 2 or fewer reveal nothing
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Label shard holders

optional

Optional labels help you print clear cards and keep track of distribution. Labels are processed locally and not stored by Shards.

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Card options

printed output

Choose what each printed shard card includes. Defaults are recommended for most users.

Include QR code
Include human-readable shard
Include holder label
Include recovery instructions
Include risk warning
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Safety acknowledgements

required
  • I am in a private place.
  • I understand Shards cannot recover this secret.
  • I will store the shards separately.
  • I understand losing too many shards means permanent loss.
No account · No upload · No server storage
Shards · v1.0.4 · browser-only Security GitHub