Developer Tools
Base64 Encoding Without the Cloud: What Your Browser Handles Locally
How Base64 encoding works at the byte level, why client-side browser encoding eliminates data exposure, and practical workflows for sensitive data.
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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Guides & How-Tos
Submitting URLs to Search Engines via IndexNow Without a CMS Plugin
How the IndexNow protocol works, how to push URLs to Bing, Yandex, and other engines from the browser, and how to verify every submission landed.
Hardware & Peripherals
Achieving Perfect Audio-Video Sync in OBS Streams Using CapyToolkit's Webcam A/V Sync & Latency Meter
Measure webcam-to-microphone latency using CapyToolkit's Webcam A/V Sync & Latency Meter. Apply the OBS Audio Offset for perfect A/V sync in your streams.
Developer Tools
Debugging 500 MB+ Application Logs in the Browser Without Uploading
Filter and search gigabyte-scale log files locally in your browser with Web Workers and IndexedDB, zero uploads, no server, no PII exposure on the wire.
Developer Tools
Counting Prompt Tokens Locally Before Sending to GPT, Claude, and Gemini
Count tokens, context usage, and input costs for 35+ AI models entirely in your browser before any prompt reaches an API. Prices updated daily, works offline.
Developer Tools
Testing WebRTC Peer-to-Peer Connection Quality Without Cloud Relay Servers
Measure direct browser latency, jitter, and packet loss with zero-cloud WebRTC tools. No servers, no uploads, no TURN relay.
Security & Privacy
A Client-Side Privacy Audit: What Your Browser Leaks and How to Clean It Before Sharing
Audit browser leaks, URL credential exposure, and hidden photo metadata with a client-side workflow. No uploads, no third parties.
Audio & Acoustics
Home Studio Decibel Calibration: Accurate SPL Measurement and Noise Floor Analysis Without Uploads
Calibrate your studio monitors and measure SPL accurately using local browser tools. Zero uploads, all calculations run client-side.
Security & Privacy
Offline OCR and Document Redaction for Privacy-Sensitive Workflows
Redact sensitive information from documents using fully offline, browser-based OCR with zero uploads.
Audio & Acoustics
No-Network-Latency MIDI Testing: Diagnosing USB Latency and Ghost Notes in Your Browser
Measure MIDI keyboard latency, detect ghost notes, and diagnose USB hardware faults entirely in your browser with zero uploads.
Security & Privacy
Client-Side PII Detection and Scrubbing Before Sending Data to AI
Detect and scrub sensitive data from AI prompts in your browser. No uploads, no cloud processing of your data, using CapyToolkit's free PII Scrubber.
Guides & How-Tos
Offline Resistor Code Decoding for Automotive Electronics Troubleshooting
Decode 4/5/6-band resistors offline for automotive ECU repairs. Avoid cloud tools, protect proprietary schematics, and fix heat-damaged components fast.