CapyToolkit

Utilities Free capytoolkit.com

Free tools that run in your browser, not the cloud

capytoolkit.com

Overview

CapyToolkit started the way a lot of side projects do: a solo developer got tired of online utilities that demand an account, an upload, or an email address before doing ten seconds of work. The answer is a free suite of 45 browser tools where nothing you touch ever reaches a server.

The catalog is deliberately practical. Test a gamepad for stick drift, measure a mouse polling rate, check a screen for dead pixels, analyze webcam lighting, or measure microphone noise floor and round-trip latency. The same site decodes JWTs, formats JSON, strips GPS data from photos, scores readability, and checks WCAG contrast. Eight categories cover hardware, developer, security, audio, math, text, design, and network work.

It runs as a plain website, an installable PWA, or a Windows app from the Microsoft Store, and works offline once installed. Every tool page includes examples and a short how-to, and a blog documents the same hardware and security topics in depth. Free, no account, staying free.

Visit CapyToolkit (capytoolkit.com) →

Pros

+Describes a wide, specific catalog of 45 distinct browser-based utilities across eight named categories

+Client-side-only processing with no account or upload required is a clear, concrete value proposition

+Available as a website, installable PWA, and Windows Store app with offline support

Things to consider

–Being a broad grab-bag of tools may mean individual tools are shallow rather than deeply featured

What it does

Hardware diagnostics like gamepad stick drift, mouse polling rate, dead pixel and webcam lighting checks

Developer tools such as JWT decoding and JSON formatting

Audio tools for microphone noise floor and round-trip latency measurement

Privacy/security tools including GPS metadata stripping from photos and WCAG contrast checking

Offline-capable PWA and Windows Store app plus a supporting blog with how-tos

Frequently asked questions

What is CapyToolkit?

CapyToolkit is an utilities tool. Free tools that run in your browser, not the cloud.

Is CapyToolkit free?

Yes, CapyToolkit is free to use.

What can you do with CapyToolkit?

CapyToolkit covers Hardware diagnostics like gamepad stick drift, mouse polling rate, dead pixel and webcam lighting checks, Developer tools such as JWT decoding and JSON formatting and Audio tools for microphone noise floor and round-trip latency measurement.