Browser-First Developer Tools Privacy Guide

See which workflows stay in your browser, which ones submit request data to ComUtil, and which lookup tools reach outside services before you paste sensitive text.

Short version

Open Base64 Privacy Policy

Browser-local today Base64, URL, JSON editor, UUID generation, and agent skill building can operate without sending the working data to ComUtil first.

Server-handled on ComUtil Hash, JWT, prompt toolkit, and structured output submit request data to ComUtil for processing.

External lookup tools IP lookup and Domain WHOIS submit the query so ComUtil can reach registry, network, or certificate sources.

Browser-local workflows

Base64 Encoder/Decoder

Encode or decode payload text locally before you copy or share the result.

URL Encode / Decode Tool

Encode full URLs, decode copied callback links, and escape query parameter values locally in your browser.

JSON Editor

Format, inspect, and clean JSON locally before it reaches another system.

UUID / GUID Generator

Generate browser-local UUID v1 or v4 values, then copy request-ID or fixture helpers without sending the generated IDs back to ComUtil.

Agent Skill Builder

Build a SKILL.md file in your browser without sending draft Markdown to ComUtil.

LLM API Tester

Send keys, prompts, and responses directly between this browser and the selected model API without routing them through ComUtil. Connection profiles remain in this browser.

Server-handled text workflows

MD5 & SHA-256 Checksum Generator

Checksum generation submits the pasted text to ComUtil for server-side processing before verification results render.

JWT Decoder

JWT decoding sends the token to ComUtil so the server can parse claims, warnings, and share-safe outputs.

AI Prompt Toolkit

Prompt cleanup and chunking submit the draft to ComUtil for redaction analysis before you move into an external AI workflow.

Structured Output Playground

Contract validation sends the target and sample JSON to ComUtil so the server can compare structure and return issues.

Server-side lookup exceptions

IP Address Lookup

IP lookup sends the queried address to the server so ComUtil can fetch ownership and network data.

Domain DNS & WHOIS Lookup

Domain DNS, WHOIS, and SSL checks send the requested hostname to the server to collect DNS records, registry data, and certificate data. Domain recent history is stored only in this browser for quick repeat lookups.

How to use the boundary

If the input is sensitive, start with a browser-local tool or redact first, then move into a server-handled or lookup workflow only when it is necessary.
Browser-local is not the same as encrypted. Text you paste is still visible to browser extensions and to anyone using the device.
Server-handled requests are processed to build the response only. ComUtil does not store the submitted input.
Lookup queries reach outside registries, so the hostname or address you check becomes visible to those third parties.

Related trust surfaces

About ComUtil

Read the product mission and the practical trust posture behind the browser-first workflows.

Review the formal policy for browser-local tools, request handling, cookies, and analytics.

AI Prompt Toolkit

Start with a browser-first prompt cleanup flow before anything moves into an external model.