A few months ago, I caught myself pasting a production JWT into a random website just to check its expiry. I’d also done the same with API responses containing customer data.

That made me realize how often we send potentially sensitive data to online tools just to do something simple.

So I built MultiTool , a Chrome extension that brings these everyday developer utilities directly into the browser.

Some of the tools included:

JSON: Formatter, validator, and JSON-to-YAML converter

JWT: Inspect tokens and check expiry

URL tools: Encoding, decoding, and query parameter viewer

Text diff: Compare two blocks of text

Security utilities: Text/file checksums, UUID and password generators

DevOps tools: Cron expression explainer with next run times, subnet calculator, and chmod converter

Converters: Timestamps, colours, images, and number bases

Screen recorder: Record a browser tab, window, or entire screen, with system audio and microphone support

The main goal was privacy.…