File scanner · browser local

Read a Wi-Fi QR code before connecting

Scan a saved Wi-Fi QR image locally and view the encoded string without automatically adding a network or opening a URL.

Illustration of scanning a saved QR code locally

What this workspace does

The decoded value with a Wi-Fi-specific explanation.

Use it accurately

Treat unknown network credentials carefully. Aftermath does not connect your device to a network.

Private browser processing

Selected files are processed in the current browser session. Aftermath has no account, cloud file storage, or server-side file-processing job.

What this tool checks

Inspect a Wi-Fi QR image locally before deciding whether to use its decoded payload. The tool displays the raw value, reported format, and a Wi-Fi-specific safety note without joining a network or changing device settings. Decoding credentials does not verify that a network is trustworthy, current, or appropriate to connect to.

What to choose and what you get

What to choose

  • one browser-decodable image expected to contain a Wi-Fi QR payload

Result

  • the raw decoded QR value, reported format, source name, and Wi-Fi-specific safety note

Supported use

  • Local inspection of a Wi-Fi QR payload before manual action
  • Display-only handling with no automatic network connection

Before you start

  • No network is joined, configured, tested, or authenticated.
  • The route does not turn ordinary text into a Wi-Fi profile or create a QR image.

Supported formats

  • Accepted formats: browser-decodable image, clipboard image.
  • Output formats: text report.

Browser support and permissions

  • Modern browser with JavaScript and a browser-decodable image; native detection or the bundled local compatibility decoder may be used.
  • No camera, microphone, or screen permission is needed.

Choose the right settings

  • Use this route when the expected QR payload describes Wi-Fi configuration.
  • Use /qr-code-scanner-from-image for general QR content.
  • Use /qr-code-generator when the intended result is a new static Wi-Fi QR image.

Worked example

A printed Wi-Fi QR should be inspected to reveal its raw network payload without connecting the current device.

Starting facts

  • The selected image is expected to contain a Wi-Fi-formatted QR.
  • Credentials in the payload are sensitive text.

Observed operation: Decode the code locally, identify the reported format and display the raw payload without initiating a network connection.

Review the result: Verify the SSID, authentication type and source of the credentials before deciding whether to use them elsewhere.

Boundary: The route does not join, test, secure or authenticate a Wi-Fi network and cannot establish who created the code.

What you can do

Inspect the raw payload of a Wi-Fi QR image without connecting

Choose another tool when

  • This route does not join, configure, test, or verify a Wi-Fi network.
  • It does not prove that encoded credentials or the network owner are trustworthy.

If it does not work

  • The selected image cannot be decoded or does not contain a detectable QR code.
  • The payload is not recognized as Wi-Fi content and receives only general QR safety guidance.
  • The code is blurred, damaged, cropped, low-contrast, or unsupported by the detector path.

Things to know

  • The result is the encoded value plus guidance, not a verified or sanitized network profile.
  • Unknown credentials and networks require independent trust decisions.
  • Aftermath displays the value but never connects the device.

Privacy boundary

Selected images and decoded values stay in the current browser session and are not sent to an Aftermath processing service. How local processing is verified.

What this tool verifies

Checks the displayed limits and reports or creates the raw decoded QR value, reported format, source name, and Wi-Fi-specific safety note from one browser-decodable image expected to contain a Wi-Fi QR payload.

Check before sharing

This route does not join, configure, test, or verify a Wi-Fi network.

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