If you are using ESA SNAP software, you have several options:
1) You can simply open the tie-point grids where the geocoding of a pixel is stored. However, you have to consider that these are only estimated based on the metadata of the scene. If you want exact coordinates, you have to apply the Range Doppler Terrain Correction first. (see image 1)
2) You can see the coordinate of each pixel in the Pixel Information tab if you move your mouse over the image (see image 2)
3) You can store a text file with pixel information and geocoding by digitizing a vector, right-clicking it > Copy pixel info to clipboard (see image 3).
I have a question about pixel location for sentinel1 and sentinel2 images? What corner of the pixel shows the actual location of the ground coordinates? like pixel location will be either upper-left corner or centroid of the pixel of the image. I am trying to find the information for S1 and S2 but getting info at the tile or granule level.