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Porwr

Secure Nostr signing for the browser — web apps get signatures, not your private key.
Install for ChromeInstall for FirefoxView Source

Encrypted key management

Your private keys are stored in an encrypted, password-protected vault that lives inside the browser extension. Keys are only decrypted in memory when the vault is unlocked.
  • AES-GCM encryption
    Keys encrypted at rest with password-derived keys
  • Auto-lock
    Vault locks after configurable inactivity
  • Multiple identities
    Manage and switch between Nostr accounts
Encrypted key management

Full NIP-07 implementation

Porwr implements the standard window.nostr interface. Any Nostr web app can request signatures through the browser signer.
  • Event review
    Review event details before signing
  • Granular permissions
    Per-site and per-event-kind permission controls
  • One-click actions
    Approve or reject with remember options
Full NIP-07 implementation

Privacy focused

No analytics. No tracking. No data collection. Fully open source and auditable. Keys never leave the extension.
  • No data collection
    Zero analytics or telemetry
  • Open source
    Fully transparent MIT-licensed codebase
  • Local storage only
    Keys never leave the extension boundary
Privacy focused

At a glance

Why Porwr is the right choice for browser-based Nostr signing.
NIP-07 compliant
Standard window.nostr interface — works with any Nostr web app
Chrome & Firefox
Published on Chrome Web Store and Firefox Add-ons
Multiple accounts
Manage and switch between multiple Nostr identities
Permission controls
Per-site and per-event-kind approval rules
Auto-lock vault
Configurable timeout keeps your keys safe
Open source
MIT licensed, auditable, no hidden code

Start signing safely in your browser

Install Porwr and protect your Nostr keys from the web apps that request them.
Install for ChromeInstall for Firefox