About RunDev
The problem with free online tools
Most of them work the same way. You paste your data into a form, it travels to a server you know nothing about, and it comes back processed. That is fine for a throwaway string. It is a real problem for a production JWT, a signed contract, an API response full of customer records, or a list of your students’ names.
You usually cannot tell which kind of tool you are using, because both look identical from the outside. The difference only shows up in a privacy policy nobody reads, or in a breach notification years later.
How RunDev works instead
Every tool here runs entirely inside your browser, using standard web APIs. Your PDF is read by JavaScript on your own machine. Your JWT is decoded on your own machine. The random names are generated on your own machine. There is no upload step, no processing queue, and no copy of your data sitting in someone else’s database — because there is no server that ever receives it.
That has a practical side effect worth mentioning: the tools keep working after the page has loaded, even with no connection. It also means we genuinely cannot see what you paste, which is the point.
No accounts, no limits, no watermarks
There is nothing to sign up for and no daily quota. Nothing is watermarked, nothing is truncated after the third use, and no result is held back behind an upgrade prompt. The tools are free because they cost almost nothing to run: the work happens on your computer, not ours.
What is here
The collection spans two kinds of thing:
- Developer tools — decoding a JWT, formatting JSON, converting a PDF into Markdown, and generating test data that will not accidentally reach a real person.
- Everyday tools — translating Morse code, splitting a class into random teams, restyling text for a bio, counting words for an assignment.
New tools are added when there is a version of them worth using — the bar being that it should be better than whatever currently sits at the top of the search results, not merely present.
How the site pays for itself
At the moment, it does not. There is no advertising and nothing is sold. If advertising is added later, the privacy policy will say so before it appears, and it will never change the fundamental rule: the content you put into a tool stays on your device.
Get in touch
Bug reports, tools you wish existed, and corrections are all welcome at contactrundev@gmail.com — or see the contact page.