CapyToolkit: 45+ free browser tools, each with a how-to guide

Overview

CapyToolkit gathers 45+ free browser utilities: hardware diagnostics, developer parsers, security scrubbers, audio tests, calculators, network references, and personal tools for photos, PDFs, and receipts. Each tool page pairs the utility with example-driven reference content.

What CapyToolkit Is

CapyToolkit is a free reference library that happens to contain 45+ working tools. The catalog spans nine 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
• Network references
• Personal tools

Notable Tools

• Resistor calculator - explains band tolerance
• Subnet calculator - breaks down CIDR notation
• MIME and HTTP status references - both searchable
• Contrast checker - quotes WCAG AA and AAA thresholds
• Personal tools: passport photo cropper, image shrinker, PDF toolkit, phone‑scan deskew, receipt splitter

How It Runs

Everything computes client‑side. Files never upload, text never leaves the tab, and no account is required. The site installs as an app, works offline once installed, and is also on the Microsoft Store for Windows. New tools ship regularly.

Pricing and Access

Free, with no paid tier. English only.

Links

• Website: https://capytoolkit.com
• Blog: https://capytoolkit.com/blog/
• Changelog: https://capytoolkit.com/changelog/
• Microsoft Store: https://apps.microsoft.com/detail/9MXJ5T93CC31