About ToolStash

ToolStash is a small collection of free, browser-based utilities for everyday developer tasks — comparing text, generating hashes and UUIDs, formatting JSON, and testing regular expressions.

Every tool on this site runs entirely client-side, in JavaScript, inside your own browser. Nothing you type or paste is uploaded to a server or stored anywhere — when you close the tab, it's gone.

The goal is simple: fast, no-nonsense tools you can reach for without creating an account, installing anything, or waiting for a page full of trackers to load.

New tools are added regularly. If there's a small utility you find yourself needing often, get in touch via the contact page.