BAY File

What are BAY files and how to open them

Are you having problems opening a BAY file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your BAY files.

What is a BAY file?

A .BAY file is a Camera RAW Image File (Casio) file.

Camera RAW Image File (Casio) with extension .bay is a proprietary raw image format produced by certain Casio digital cameras. A .bay file holds the unprocessed image data directly from the camera's sensor, before any in-camera processing such as color correction, sharpening or JPEG compression. This allows maximum flexibility for post-capture editing, particularly for professionals or enthusiasts who wish to adjust exposure, white balance or tonal range with no loss of sensor detail.

These files are created by enabling raw image or Bayer capture modes on compatible Casio cameras. Often the camera also saves a JPEG version alongside the .bay file so that users can view something immediately on the device. To work with the .bay file, users transfer it to a computer and use image development or photo-editing software that supports the Casio raw format, converting or rendering it into more common image formats like TIFF or JPEG for viewing or printing.

Internally the .bay format stores the Bayer-filtered CCD data without compression or encoding, reflecting a "pure" dump of the sensor's output. The data may vary in bit depth depending on the camera model (e.g. 8-bit or higher), image dimensions change with sensor resolution, and different models include unique arrangements (for example extra bytes per row or trailers) as required by that sensor design.

How to open BAY files

We have identified two BAY openers that are compatible with this specific type of BAY file.

Programs that open Camera RAW Image File (Casio) files

Last updated: January 22, 2025

Various apps that use files with this extension

These apps are known to open certain types of BAY files. Remember, different programs may use BAY files for different purposes, so you may need to try out a few of them to be able to open your specific file.

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File.org helps thousands of users every day, and we would love to hear from you if you have additional information about BAY file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.