QR Code Decoder Documentation & Guide

Overview

QR Code Decoder is an easy and free online tool that runs in your browser.

Free online QR code decoder and scanner - decode QR codes from images, camera, or drag and drop. Extract text, URLs, WiFi passwords, contact info from any QR code instantly.

This documentation explains what the tool is for, what inputs it supports, and practical step-by-step usage so the page remains searchable and useful.

Tip: start with a small sample to validate settings before processing large files.

What you can do with this tool

Key capabilities (based on the actual UI and code):

• Supports files: image/*
• Uses browser libraries: qr-scanner
• Runs in your browser (local-first)
• May use WebWorker for heavy processing

Inputs & supported formats

Accepted file types: image/*

Folder selection is not detected in the UI.

Major libraries used: qr-scanner

How to use (step-by-step)

1) Open the tool page.

3) Provide input (text / options / files).

5) If file input is available, drag & drop files or use the file picker.

6) Run the main action and review the output/preview.

7) Copy / download / export the result.

Privacy, offline & limitations

Local-first by design: whenever possible, processing happens on your device.

No registration is required. Avoid pasting secrets or private data on shared devices.

No network requests were detected in the main script; it should work locally once loaded.

For heavy tasks the tool may rely on WebWorkers; if workers are blocked, some features may degrade.

Troubleshooting

If the tool does nothing: check required inputs/options and try a smaller sample.

If a file fails to load: confirm the file type is supported and retry with a smaller file.

If something looks wrong: reset options and retry with default settings.

FAQ