CapyToolkit

Overview

About CapyToolkit

CapyToolkit is a free reference library that happens to contain 45 working tools. The catalog spans eight categories: hardware and display diagnostics, developer parsers and encoders, security and privacy tools, audio and acoustic testing, math and engineering calculators, text analysis, web design utilities, and network references. Each tool page pairs the utility with example-driven reference content: the resistor calculator explains band tolerance, the subnet calculator breaks down CIDR notation, the MIME and HTTP status references are searchable, and the contrast checker quotes WCAG AA and AAA thresholds. Over a thousand pages of documentation support the catalog, and the blog adds buying guides and hands-on walkthroughs. Everything runs client-side in the browser. Files never upload, text never leaves the tab, and no account is required. The site installs as an app, works offline, and is also on the Microsoft Store for Windows. New tools and reference pages ship regularly.

CapyToolkit screenshots

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CapyToolkit features

• 45 tools in eight categories, from hardware diagnostics to network references
• Example-driven reference content on every tool page
• Searchable references: MIME types, HTTP status codes, unit conversions
• A blog with hands-on guides and buying advice across the same topics
• Everything computes locally, free, with no account required

CapyToolkit is listed as free to use. Visit the website for current usage limits and availability.

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