I built 150+ developer utilities that run entirely in the browser (no backend)

jivan patel — Sat, 14 Mar 2026 23:33:09 +0000

Over the past few weeks I’ve been working on a small side project called DataMorph.

The goal was simple: create a collection of developer utilities that run completely in the browser so developers can quickly format, convert, and inspect data without installing anything.

Many developer tool websites rely heavily on backend processing and ads. I wanted to explore a different approach — building a tool suite where everything runs client-side.

The result ended up being around 150 small tools covering things like:

• JSON formatter / validator

• Base64 encode & decode

• JWT decoder

• Regex tester

• API request builder

• CSV viewer

• DNS lookup

• UUID generator

• Data format converters (JSON ↔ CSV ↔ YAML ↔ XML)

One interesting constraint was keeping everything browser-only.

This meant:

No server-side processing
No APIs required
No user data leaving the browser

For example, even large JSON responses can be formatted directly in the browser using streaming parsing to avoid blocking the UI.

Another advantage is privacy — since the tools run locally, sensitive data like API responses or tokens never leave the user's machine.

I also intentionally kept the site ad-free to keep it fast and distraction-free.

You can try one of the tools here:

https://data-morph.dev/json-formatter

If you're curious, the full tool collection is here:

https://data-morph.dev

I'm continuing to add tools and improve performance. If there are utilities you wish existed, I’d love to hear suggestions.

DEV Community: jivan patel

I built 150+ developer utilities that run entirely in the browser (no backend)