As developers, we use online tools every day.
- JSON formatters
- JWT decoders
- Base64 encoders
- Hash generators
- URL encoders
- Diff tools
- And many more.
But there's one question we don't always ask:
Where does the data we paste into these tools go?
Think about the data we work with every day:
- API responses
- Configuration files
- Application logs
- JWTs and tokens
- Internal URLs
- Database records
- Source code
Sometimes, we paste this data into online tools just to perform a simple operation.
I wanted a different approach.
So I built LocalOnly.dev.
What is LocalOnly.dev?
LocalOnly.dev is a collection of free developer tools built with a privacy-first approach.
The idea is simple:
If a task can be done directly in your browser, why send your data to a server?
LocalOnly.dev focuses on tools that can process data locally in your browser whenever possible.
No account required for the core tools.
No unnecessary backend dependency.
Just open a tool, do your work, and move on.
What can you do?
LocalOnly.dev includes tools for:
- 🧩 JSON formatting and validation
- 🔍 JSON comparison
- 🔐 Security and hash utilities
- 🔄 Encoding and decoding
- 🌐 URL utilities
- 📝 Text transformation
- 🧑💻 Developer productivitye
- And more tools are coming
The goal isn't to build another collection of random utilities.
It's to build a privacy-first toolbox that developers can actually use every day.
Why does this matter?
Local processing doesn't make every workflow automatically secure, and developers should always understand what a tool does with their data.
But when a task doesn't require a server, I believe we should have the option to keep our data on our own device.
That's the idea behind LocalOnly.dev
Your data. Your browser. Your control.
I'm building LocalOnly.dev in public and would love your feedback.
What developer tool do you use every week that you wish had a more privacy-friendly alternative?
Try it out and let me know what I should build next:
Built by a developer, for developers. 🚀
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