Most online tools require uploading your data to servers. Whether you are formatting a sensitive JSON payload, decoding a URL with internal parameters, or resizing a proprietary image, that data usually leaves your machine.
That means:
- Potential privacy risks: Who owns the server? Is your data being logged?
- Slower performance: Latency from uploading and downloading large files.
- Unnecessary dependencies: If your internet is spotty or the service is down, your workflow stops.
So, I built a set of developer tools that run completely in the browser. No backend. No uploads. No tracking. Your data never leaves your device.
🌐 Try it here: tools.lobhari.click
What’s inside the toolbox?
I wanted to consolidate the most common "quick tasks" into a single, clean interface without the bloat of heavy desktop applications.
1. JSON Processor (Formatter & Validator)
Working with minified API responses can be a headache. This tool beautifies messy JSON into a readable structure, validates syntax (catching those missing commas!), and can minify data back down for production use.
- Key features: Instant "Copy to Clipboard" and local download.
2. URL Encoder & Decoder
Handling special characters and hex values in web addresses is a daily task for web devs. This tool provides a live preview as you type, making it easy to debug complex query parameters or pathnames safely.
3. REST API Client
Think of this as a "Postman-lite" that lives in your tab. You can send GET, POST, PUT, DELETE, and PATCH requests, manage custom headers (like Authorization), and inspect response bodies—all without opening a heavy standalone app.
4. Image Optimizer
Website performance is king. This tool allows you to compress and resize images to strike the perfect balance between file size and quality.
- Privacy note: Unlike most online converters, this uses browser-based canvas processing. Your photos are processed locally and are never stored on a server.
5. Diff Checker
Need to see what changed between two versions of a config file or a block of code? The Diff Checker provides a side-by-side comparison with clear red/green highlighting for deletions and additions.
Why "No Backend" matters
By using client-side JavaScript to handle the logic, the Dev Toolbox is:
- Secure by Design: It is physically impossible for me (or anyone else) to see your data because it never leaves your RAM.
- Fast: Processing happens at the speed of your local CPU.
- Offline-Ready: Once the page is loaded, the tools work even if you lose your connection.
I’d love your feedback!
This is a project built by a developer, for developers. I’d love to hear from the community:
- What other tools do you find yourself constantly searching for?
- Are there any specific features (like JWT decoding or Base64 conversion) you'd like to see added next?
Check it out here: tools.lobhari.click
If you find it useful, feel free to bookmark it! Happy coding! 🚀
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