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Dev tools · March 25, 2026

Konvertio

The dev toolbox that never phones home.

What it does

Every developer has a tab graveyard. JSON formatter from one site. Base64 encoder from another. Diff checker from a third. Each one asking you to sign up, or quietly handling your data on their servers. I got tired of it. So I built Konvertio — 135+ free developer tools in one place, running entirely in your browser. Nothing ever leaves your machine. One bookmark. Done

Does the same job

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