CapyToolkit

40+ free browser tools that never upload your data

?·Published on Oct 4, 2026·0 reputationReputation invested into this product to boost its ranking. Anyone can spend the reputation they've earned here — recent investments count for more and lift the product higher on the leaderboard. This is separate from community upvotes.

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About CapyToolkit

CapyToolkit is a growing collection of 40+ free, browser-based utilities for developers, IT professionals, and hardware enthusiasts — spanning hardware diagnostics, developer parsers, audio testing, security, math/engineering calculators, and network tools. Every tool runs 100% client-side: nothing is uploaded to a server, no account is required, and most tools work fully offline once loaded.

What sets CapyToolkit apart is depth on tools other sites treat as afterthoughts. The input lag and mouse polling rate tester measures real PointerEvent latency instead of guessing. The microphone tester checks noise floor, clipping, frequency response, and round-trip latency in one pass. The browser fingerprint inspector surfaces 30+ leak signals (canvas hash, WebGL renderer, audio fingerprint, fonts) so users can audit their own privacy exposure. The PII scrubber and secret scanner let developers sanitize prompts and codebases before anything leaves the machine.

Real outcomes: streamers check their webcam/mic setup before going live, engineers decode resistor color codes and solve Ohm's Law without leaving the tab, security-conscious developers hash files and strip EXIF data without trusting a third-party uploader, and IT teams calculate subnets and inspect certificates on the fly. New tools ship regularly — the roadmap includes a WASM binary inspector, quantum-safe encryptor, and secret scanner.

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