I'm wary of using closed-source online string formatters and converters, so I've been working on
https://string.is/ as a safe, open-source alternative. I had a couple of goals when building it:
1. It should be open-source.
2. It should not set any cookies.
3. It should have a strict Content Security Policy.
4. It should be opinionated about dependancies, and only use well-known, well-supported libraries.
5. It should try to detect the format of the input, and intelligently choose output options.
The last point in particular I feel is an improvement on most existing services - paste in some text and it will try to auto-detect the format and convert it accordingly (although admittedly detection of some formats is a bit primitive currently).
It's built with TypeScript + Next.js. In addition to the hosted version, the GitHub README has one-click install buttons for Vercel and Heroku, plus Docker images.
Source: https://github.com/recurser/string-is
Demo: https://string.is/ (click 'load an example' to get a random converter)
More info: https://string.is/about
There are a couple of other tools in this space if you're interested in alternatives:
- https://gchq.github.io/CyberChef/ (online)
- https://devutils.app/ by HN member trungdq88 (MacOS)
- https://devtoys.app/ by HN member veler (Windows)
- https://boop.okat.best/ (MacOS)
