Stellar WebSigner

Key Management (Stellar StrKey)

Generate New Keypair

Generates Ed25519 key material through the browser provider and displays the seed once for offline backup. Prefer an external wallet.

Generated Secret Seed (S...)

Record the seed offline. Clipboard export is intentionally unsupported.

Generated Public Address (G...)

Import Seed / Address

Warning: online JavaScript origin integrity is private-key integrity. Import a production seed only from an independently verified offline build on a dedicated trusted device.

Secret Seed (S...)

Enter the matching G... address below first: the seed is then checked with a signature instead of exporting the private key to derive the address.

Public Address (G...) for verify-only mode

Active Session

No keys loaded in active memory.

Create Signature (.sig)

Flow: choose content -> inspect digest -> sign locally or create unsigned XDR for external wallet -> download.

Input Type

File Plain Text

The app computes SHA-256 and SHA3-512, then signs a versioned protected manifest that binds the exact input metadata and both digests. External-wallet signing binds that manifest digest into XDR.

File to Sign

Computed Digests

SHA-256

HEX

SHA3-512

HEX

Sign Locally SEP-53 signature over the protected content manifest

Uses a loaded non-extractable signing key session. Cleanup is best effort; browser memory cannot guarantee zeroization.

Sign With External Wallet (XDR) Generate unsigned XDR, sign externally, paste signed XDR

This app never receives the external wallet secret seed. It generates an unsigned XDR proof request and verifies the returned signed XDR.

Load signer `G...` in Keys before generating XDR, sign on Stellar Public Network in your external wallet, and paste the signed XDR back here.

Unsigned XDR

Confirm in your wallet before signing

The wallet must show exactly one Manage Data operation named org.stellar-websigner.manifest.sha256 with this value and sequence number 0. Any other operation, value, or account means the request is not the one generated here.

Paste Signed XDR

Signature Output

Signer

Proof Profile

Input

Hashes

Signature Size

Signature (Base64)

Signature JSON

Waiting for input.

Diagnostics

Verify Signature (.sig)

Checks SEP-53 content signatures and XDR proofs, then reports detailed reasons for invalid state.

Input Type

File Plain Text

Original File

Signature File (.sig)

Expected Signer (optional)

Use a public key you trust independently. Leaving this blank checks the signature without confirming signer identity.

Diagnostics