Pan and zoom to view the details of your image. The mouse cursor includes highly visible crosshairs that bracket the pixel under the cursor, as well as that pixel's row and column.

Right-click-and-drag to create a sticky selection with offset and size information. Hold down Shift while drawing the selection to snap the selection to horizontal, vertical, or square. Edit the selection with the right mouse button or with Ctrl + left mouse button if you only have one.

Press Ctrl+A (or Command+A on Mac) to select the entire image.

The number of pixels in the selection, along with the chromatic mean, median, and mode are listed.

Every click on the image logs the color, pixel position, and the properties of any current selection. You can format these log entries in a number of useful ways and copy them individually or in a list.

Custom formatters can use any combination of the following properties:

The color distance (in the 0-255 space) between consecutive entries in the click log is shown between the entries on the left.

The click log can easily be used to generate a palette from an image. Just click on colors you like, delete any log entries you don't want, and copy the result to the clipboard in your chosen format.

Paste a body of text or HTML into the Click Log and it will automatically extract all the colors present in the text. Then use the Click Log's copy feature to get back a clean list of those colors, formatted per your custom formatter

Crop the image to your selection. Just select an area and hit Enter.

Delete the contents of your selection. Just select an area and hit the Delete key. Useful if you want to share a screen shot, but avoid sharing sensitive information.

After cropping or redacting, you can download the resulting image to your computer.

Copy the current selection (or the entire image if there is no selection) using the standard keyboard shortcut (Ctrl+C or Command+C). Images on the clipboard may be pasted using the standard key binding (Ctrl+V or Command+V).

When you make a selection, there's a red dashed trace line shown in the selection. The pixel values and RGB channels along that line are shown in a separate profile display that allows you to see precisely how they vary. The length of the red dashed line is shown in pixels, allowing you to make precise measurements between features in the image.

When you make a selection, there's an RGB histogram shown of those specific pixels.

When you make a selection, the PCA chart shows how the colors in the selection are distributed in color space. The standard deviations of the pixel colors within the selection in each of their principal directions are listed in the σ vector above the PCA chart.

Load up any number of images and flip between them. Each image maintains its own view and selection state.

When you load up multiple images with the same dimensions, the view state is preserved when flipping between them. This allows you to detect subtle differences between them, which is especially useful when zoomed in. Press the Page Up and Page Down keys to quickly toggle between consecutive images.

Press 'S' to add up to 200 of the distinct colors in the selection to the click log.

Press 'A' to toggle Ignore Alpha Mode. When enabled, the alpha channel is ignored, treating all pixels as fully opaque, revealing what color underlies fully or partially transparent pixels.

Press 'J' to toggle JPEG Mode. JPEG mode helps you understand the noise and distortions caused by JPEG compression of logos or other 2D graphics with flat colors. The 8x8 or 16x16 JPEG grid is shown with red lines, and cells with all a single color are shaded with a semi-transparent red color. The mosquito noise, overshoot, and other JPEG artifacts can be seen in un-shaded cells.

Click the ellipsis menu on each image record to access options to send your image to our companion services, Recompressor.com and PixFix.com.