Chrome extension for in‑browser WebAuthn and passkey testing
WebAuthn Solver, from WebAuthn Solver, is a Chrome extension that helps developers test and debug passkey-based authentication flows. It moves parts of the WebAuthn test process into the browser so developers can complete authentication challenges without switching tools. Built for developer workflows, the extension connects in‑browser challenge handling to device-backed authenticators and reduces manual test steps. It targets web developers, security engineers, and QA testers working with FIDO2 and passkey protocols, and is aimed at hands-on testing rather than general consumer use.
How does the extension resolve WebAuthn challenges during testing?
WebAuthn Solver intercepts publicKey challenge flows presented by web pages and returns the required assertions to the system under test. The extension integrates with device-level passkeys so a physical authenticator can produce the response the page expects. That direct browser-to-authenticator path removes the need for ad hoc helper scripts when exercising creation and assertion flows during development and security audits.
How light is the extension and how does it affect developer workflows?
The add-on is designed to be compact and work inside the browser, which keeps test steps within a single environment. The product is described as a lightweight developer utility, and that design reduces context switching between desktop tools and external authenticators. Developers who iterate on passwordless flows can run browser-based checks without rebuilding server mocks repeatedly.
What permissions and devices are required to use it?
The extension requires permissions to interact with pages that issue WebAuthn challenges, and certain flows need a nearby passkey-capable device, such as a smartphone, to complete authentication. Because it acts as a bridge to the physical authenticator, tests that rely on external hardware must have that device available and paired according to platform passkey rules.
Who is this suited for and how does it compare to manual testing?
This is a developer-focused tool rather than a consumer feature; the intended users are web developers, security engineers, and QA testers who implement or audit FIDO2 and passkey systems. User reception places the extension in a niche category that removes manual friction from test cycles. For teams that require repeatable in-browser assertion checks, it provides a more direct path than running separate hardware scripts.
Practical choice for developer testing, with a focused scope
WebAuthn Solver is a practical option for developers and testers who need faster in‑browser passkey validation during development. Its narrow focus on test workflows means teams that do not run hardware-backed checks will gain little from it. A sensible practice is to enable the extension only on test sites and grant the minimal permissions required for a session, which keeps its use confined to development environments.
