Image Color Depth Checker

The browser loads your image onto an HTML5 Canvas and reads the pixel data. Our tool analyzes the color values of each pixel to count unique colors, detect grayscale vs color data, identify alpha transparency, and estimate the bit depth. For higher depths like 48-bit, we combine pixel analysis with file type information and binary scanning for ICC profiles to make the most accurate determination possible.

The HTML5 Canvas API quantizes all pixel data to 8 bits per channel for security reasons, so we cannot directly read 16-bit channel data from the canvas. However, for formats like TIFF, PSD, and EXR - which are commonly used for deep color workflows - we detect the file type and combine it with ICC profile scanning and pixel data analysis to estimate the likely bit depth. The tool clearly indicates when the depth is an estimate rather than a direct measurement.

The tool supports any image format that the browser can render on a Canvas element. This includes JPEG, PNG, GIF, WebP, BMP, SVG, ICO, and AVIF, HEIC/HEIF on supported browsers. For professional RAW formats like CR2, NEF, ARW, and DNG, you may need to convert them to a browser-compatible format first using our RAW converter tools before checking their color depth.

Yes, your images are completely safe. All processing happens entirely within your browser using the Canvas API. Your image files are never uploaded to any server - they never leave your device. This means you can freely analyze sensitive or confidential images without any privacy concerns. No account creation or signup is required.

A 24-bit image uses 8 bits each for the Red, Green, and Blue channels - totalling 16.7 million possible colors. A 32-bit image adds an 8-bit Alpha channel for transparency, giving 16.7 million colors plus 256 levels of opacity. 32-bit images are essential for web graphics that need transparency (like logos with rounded corners) and for game textures where alpha channels control transparency or material properties.

An ICC (International Color Consortium) profile is a set of data that defines the color space of an image. It tells software how to correctly interpret and display the colors. Common profiles include sRGB (standard for web), Adobe RGB (wider gamut for print), and Display P3 (used on modern Apple devices). Our tool detects embedded ICC profiles in JPEG and PNG files, helping you understand whether your image includes accurate color reproduction information.

While our tool cannot directly measure print quality, the color depth information it provides is a strong indicator. For professional printing, images should typically be at least 24-bit (true color) with a resolution of 300 DPI or higher. Images detected as 1-bit or 8-bit indexed are generally not suitable for high-quality printing unless a specific effect is desired. The color space detection also helps - Adobe RGB images are often preferred for print workflows.

Indexed color means the image uses a limited palette of colors rather than storing full RGB values for every pixel. Instead of 24 bits per pixel, the image stores an 8-bit (or smaller) index that points to a color in the palette. This is common in GIF and PNG-8 images and is very space-efficient for graphics with few colors, but it causes visible banding and quality loss in photographic images with smooth gradients.

Yes, it is completely free. There are no hidden charges, no usage limits, no premium tiers, and no account creation required. You can analyze as many images as you want, as often as you like, without any restrictions. All processing happens locally in your browser, so we have no ongoing server costs to pass on to users.