Question 1

What is QR Inspecter?

Accepted Answer

QR Inspecter is a free, privacy-first web utility toolkit and developer sandbox. It offers over 22+ browser-based tools to format JSON, decode JWTs, resize images, generate secure passwords, convert timestamps, analyze cron expressions, minify SVGs, and inspect QR codes safely. Every action runs 100% client-side in your local browser.

Question 2

How do client-side utility tools keep my data safe?

Accepted Answer

Unlike traditional online converters that upload your code, confidential files, or text to remote cloud servers, QR Inspecter uses native browser APIs (such as Web Crypto API, Canvas API, and FileReader). Your inputs are parsed and processed in your local browser memory, ensuring your code, passwords, JWT tokens, and images never leave your machine.

Question 3

What tools are included in the utility toolkit?

Accepted Answer

Our toolkit features 22+ browser utilities across four key categories: Developer Tools (JSON Formatter & Validator, JWT Decoder, Base64 Encoder/Decoder, UUID Generator, Unix Timestamp Converter, Cron Explainer, Keycode Finder, Git Branch Generator), Design & Media (Image Resizer, SVG Optimizer, SVG Vectorizer, SVG to Image, App Screenshot Mockup Builder, Barcode Generator), Text & Data (Password Generator, Case Converter, CSV ↔ JSON Converter, Markdown Editor, URL Encoder/Decoder, Lorem Ipsum), and QR Tools (QR Code Scanner & Threat Inspector, Bulk QR Generator).

Question 4

Do I need an account or subscription to use the tools?

Accepted Answer

No. All tools on QR Inspecter are 100% free with no sign-ups, no registration, no subscriptions, no ads, and no usage limits. You can open any tool, complete your work, and close the tab anytime.

Question 5

How does client-side JSON formatting and JWT decoding work?

Accepted Answer

When you paste JSON or JWT strings into our developer tools, JavaScript running inside your web browser parses the payload in memory. Syntax validation, formatting, and JWT claim extractions happen instantaneously without sending any tokens or data payloads across the network.

Question 6

Can I resize images or optimize SVGs without uploading them to a server?

Accepted Answer

Yes! Our image resizer, SVG optimizer, vectorizer, and converter tools render images onto an HTML5 Canvas element inside your browser. Calculations and compression are performed locally on your device, and processed files are downloaded directly from your browser memory.

Question 7

What is QR Code Phishing (Qishing) and how does QR Inspecter detect it?

Accepted Answer

Qishing is a social engineering attack where malicious actors replace legitimate QR codes with malicious stickers pointing to spoofed websites. QR Inspecter allows you to safely scan digital files or live camera streams, evaluating destination URLs for SSL encryption, phishing keywords, known link shorteners, and suspicious query parameters before you visit them.

Question 8

Why is client-side QR scanning safer than traditional online scanners?

Accepted Answer

Most web-based QR scanners stream camera feeds or parsed URLs to backend servers, creating logs of scanned locations and links. QR Inspecter decodes QR codes entirely in your browser using WebAssembly and jsQR/ZXing engines, keeping your camera stream and URLs private.

Question 9

Are tools on QR Inspecter available offline?

Accepted Answer

Yes. Once the web application loads in your browser, all processing scripts and tool logics run locally. You can continue using tools like JSON Formatter, Base64 Encoder, Password Generator, and Image Resizer even if your internet connection drops.

Question 10

Does QR Inspecter collect or store any personal data or files?

Accepted Answer

No. We have zero backend databases, zero file storage servers, and zero data tracking scripts. Your files, strings, passwords, and images are never stored, logged, or shared.

Developer & Security Guides

Developer & Data Workflows

JSON Formatting, Validation & Security Guide

JWT Debugging, Token Inspection & Claims Security

Client-Side Developer Productivity Toolbox

Design & Media Optimization

Client-Side Image Optimization & SVG Vectorization

QR Threat & Physical Security Audit

The Ultimate Guide to QR Code Security

What is Qishing? Understanding QR Phishing

Detecting Fake & Tampered QR Codes

How to Generate QR Codes Safely

Securing Business QR Code Deployments