Zeugly is a free, privacy-first web utility toolkit and developer sandbox. It offers over 95+ browser-based tools to format JSON, decode JWTs, resize images, generate OG preview cards, create secure passwords, convert timestamps, analyze cron expressions, minify SVGs, and inspect QR codes safely. Every action runs 100% client-side in your local browser.

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

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

Are tools on Zeugly available offline?

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.

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

Unlike traditional online converters that upload your code, confidential files, or text to remote cloud servers, Zeugly 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.

Does Zeugly collect or store any personal data or files?

No. We operate under a strict zero-data collection rule. We have zero backend user databases, zero file storage servers, and zero data tracking scripts. We never ask for or store names, mobile/phone numbers, or physical addresses.

What is Zeugly's cookie policy regarding Google AdSense?

We use third-party advertising partners, including Google AdSense, to serve non-intrusive advertisements. Third-party vendors use cookies to serve ads based on prior web visits. Users can opt out of personalized advertising by visiting Google Ads Settings or www.aboutads.info.

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

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.

Are generated passwords and UUIDs cryptographically secure?

Yes. Our password generator and UUID v4 creator use hardware-backed operating system entropy via window.crypto.getRandomValues(). Seeds are generated strictly in your local device CPU.

Can I resize images, create OG cards, or add watermarks without uploading them to a server?

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

What dimensions are used by the Open Graph (OG) Image Generator?

Our OG Image Generator renders at the standard 1200 x 630 pixels (1.91:1 ratio), optimized for Facebook, Twitter Cards, LinkedIn, Slack, and Discord link previews.

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

Qishing is a social engineering attack where malicious actors replace legitimate QR codes with malicious stickers pointing to spoofed websites. Zeugly 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.

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

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

QR Code Inspector - Workspace

QR Code Inspector

Upload an image, drop a file, paste from clipboard, or use your camera to scan QR codes and barcodes. Detect tracking parameters, phishing threats, and hidden payloads with 100% client-side privacy.

How to Use Report Bug

Drag & drop your QR code or barcode image here

or click to browse from files

Supports pasting images via Ctrl+V

Inspection Dashboard

Idle

Scan a QR code or barcode to inspect

Upload a QR code or barcode image, or switch to Webcam to scan live and inspect it for tracking, phishing risks, and other hidden details.

Why Inspect QR Codes Before Scanning?

Prevent Quishing (QR Phishing)

Malicious actors often replace legitimate QR codes with stickers pointing to spoofed login portals designed to steal banking or identity credentials.

Inspect Hidden Payloads

Preview secret Wi-Fi credentials, executable scripts, contact cards, or shortened URLs before your device executes them automatically.

100% Client-Side Privacy

Your uploaded images and camera video feeds are processed entirely inside your browser web assembly memory — zero server uploads.

Step-by-Step Guide

How to Use QR Code Inspector

01Step 1

Provide Image or Stream

Upload a QR image, drag & drop a file, paste from clipboard (Ctrl+V), or start your live webcam scanner.

02Step 2

Automatic Payload Extraction

Client WebAssembly parsers extract URLs, text strings, vCards, Wi-Fi keys, or binary data in real-time.

03Step 3

Security Threat Audit

Inspect domain safety, URL redirects, tracking parameter leaks, and potential Qishing phishing threats.

04Step 4

Safe Copy & Action

Copy raw text, download vCard contacts, or navigate to verified safe links with 100% browser privacy.

Key Features & Capabilities

Multi-source input: File upload, drag & drop, clipboard paste, live webcam
Security risk audit & threat score analysis
Tracking parameter identification (UTM, gclid, fbclid)
vCard contact file generator & Wi-Fi credential parser
100% browser WebAssembly execution — zero data sent to cloud

Privacy & Security Guarantee

100% Client-Side Privacy: All operations occur locally in your web browser memory using JavaScript and WebAssembly. Your files, text payloads, and images are never uploaded to external servers or stored in cloud databases.

Processing Mode: 100% Offline ClientZero Server Telemetry

Frequently Asked Questions

View All Platform FAQs

Are my scanned QR images or camera feeds uploaded to any server?

No. All scanning and security analysis execute 100% locally inside your web browser memory. Camera video streams are never transmitted across the network.

What types of barcodes and QR formats are supported?

Supports QR codes, Micro QR, Data Matrix, Aztec, UPC-A, EAN-13, Code 128, Code 39, and PDF417 codes.

How does the security threat score work?

The inspector evaluates URL heuristics, domain age patterns, TLD risk profiles, IP address literals, and tracking parameters to calculate a safety score from 0 to 100.

Experiencing an issue with QR Code Inspector?

Notice a bug, calculation error, or unexpected result? Let us know.

Report Bug

Zeugly