Testnizer — The offline API client

Offline, open-source API client. Your data never leaves.

Developer tools Product Hunt Launched Jul 21, 2026 by [REDACTED] [REDACTED] View original post ↗

A free, standalone desktop API client (REST, SOAP, GraphQL, gRPC, WebSocket & more) that runs 100% offline. Collections stay in local SQLite, tokens in your OS keychain — nothing ever goes to a vendor cloud. Built-in offline dev tools. Open source (MIT).

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