Stop pasting tokens and payloads into random websites. 48 offline developer tools fStop pasting tokens, payloads, certificates and internal data into random websites. CodeSwissKnife 2.0 brings 40+ developer tools to your Mac, with local-first processing, an MCP Inspector, and an AI Developer Library for organizing skills, agents, prompts and rules across Claude, Codex, Cursor and your projects. One-time purchase, no subscriptionor macOS, plus the AI Developer Library.
Hi Product Hunt! I’m Otto, the developer behind CodeSwissKnife.
I first built CodeSwissKnife because I was tired of searching for small developer utilities every time I needed to format JSON, decode a JWT, inspect a certificate, compare data, or convert something quickly.
The bigger issue was privacy. These tools are often used with API payloads, tokens, logs, certificates, and internal project data, and I didn’t want to keep pasting that into random websites.
I’d really appreciate your feedback, especially on this question:
What developer task do you still solve with a random website because you haven’t found a good local tool for it yet?
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