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. Hardware testers cover gamepad stick drift, mouse polling rate, dead pixels, webcam lighting, and microphone noise floor and latency. Developer and security tools cover JWTs, JSON, and photo metadata. Personal tools handle passport photos, image file-size limits, PDFs, phone-scanned documents, and receipt splitting. Nine categories in all: hardware, developer, security, audio, math, text, design, network, and personal. It runs as a website, an installable PWA, or a Windows app from the Microsoft Store, and works offline once installed. Every tool page has examples and a short how-to. Free, no account, staying free.
Launch Team / Built with
Launch Date:
September 21, 2026
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