Guides & How-Tos
Ohm's Law: Solving for Voltage, Current, and Resistance Without a Scientific Calculator
Master Ohm's Law and Watt's Law so you can solve any circuit equation by hand and know when to reach for a calculator.
Blog
Guides, buying advice, and tool deep-dives from the CapyToolkit team.
Developer Tools
Debugging and Exploring Parquet Files with Local SQL Queries
Query and debug Parquet files locally with SQL, inspect schemas, validate data, catch errors before they reach production.
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Buying Guides
Choosing an AI Model Based on Token Pricing and Context Window Fit
Compare 37 AI models by token cost, context window size, and live pricing before your next API call. Stop guessing what your prompts actually cost.
Developer Tools
How Java Developers Use Client-Side Case Conversion for Clean Code and Configuration Files
Java naming conventions demand camelCase, PascalCase, and SCREAMING_SNAKE. Here is how to convert between them locally without sending code to a server.
Security & Privacy
Parsing and Inspecting URLs Locally to Catch Tracking Parameters and Credential Leaks
Decompose URLs into every component, inspect query strings for tracking tokens and leaked credentials, all without sending data to any server.
Buying Guides
Monitor Buying Guide: Dead Pixels, Backlight Bleed, Motion Ghosting, and Color Uniformity Tests You Run in the Browser
Catch dead pixels, backlight bleed, ghosting, gradient banding, and contrast issues before your return window closes.
Security & Privacy
Inspect X.509 Certificates Locally to Catch Expiry and Misconfigurations Before Deployment
Inspect X.509 certificates in your browser without uploading. Read the full chain and catch expiry, weak keys, SHA-1 signatures, and misconfigurations.
Security & Privacy
Sanitizing Kubernetes and Terraform Manifests Before Committing to Version Control
Scan Kubernetes and Terraform configs for secrets before committing. Detect hardcoded credentials and security smells, and generate sanitized manifests.
Guides & How-Tos
Subnet and CIDR Calculation for Local Network Planning Without Cloud Tools
Plan IPv4 and IPv6 networks locally using CapyToolkit's client-side CIDR calculator. No cloud, no uploads, no topology exposure.
Developer Tools
Query Local Files with SQL in the Browser Using CapyToolkit's SQL Workbench
Run DuckDB SQL on Parquet, CSV, Excel, JSON, and eight more file formats in your browser. No install, no upload, no server. Just open a tab and query.
Buying Guides
Headphone Buying Guide: How to Test Frequency Response, Channel Balance, and Latency Before You Commit
How to decode headphone specs, what to listen for on first listen, and how to verify frequency response, channel balance, and latency in your browser.
Developer Tools
Hash Functions in the Browser: How to Use CapyToolkit's Client-Side Hash Generator for Integrity Checks and HMAC Signatures
How hash functions work, which algorithms are safe in 2026, how HMAC protects webhooks and APIs, and how to run it all locally with CapyToolkit.
Buying Guides
Gaming Peripheral Specs You Can Verify in the Mouse, Controller, and Webcam
Gaming mice, controllers, and webcams ship with spec-sheet numbers measured in ideal lab conditions. Verify each one locally in your browser.