  We present the largest optical photometry compilation of Gamma-Ray Bursts
(GRBs) with redshifts ($z$). We include 64813 observations of 535 events
(including upper limits) from 28 February 1997 up to 18 August 2023. We also
present a user-friendly web tool \textit{grbLC} which allows users the
visualization of photometry, coordinates, redshift, host galaxy extinction, and
spectral indices for each event in our database. Furthermore, we have added a
Gamma Ray Coordinate Network (GCN) scraper that can be used to collect data by
gathering magnitudes from the GCNs. The web tool also includes a package for
uniformly investigating colour evolution. We compute the optical spectral
indices for 138 GRBs for which we have at least 4 filters at the same epoch in
our sample and craft a procedure to distinguish between GRBs with and without
colour evolution. By providing a uniform format and repository for the optical
catalogue, this web-based archive is the first step towards unifying several
community efforts to gather the photometric information for all GRBs with known
redshifts. This catalogue will enable population studies by providing light
curves (LCs) with better coverage since we have gathered data from different
ground-based locations. Consequently, these LCs can be used to train future LC
reconstructions for an extended inference of the redshift. The data gathering
also allows us to fill some of the orbital gaps from Swift in crucial points of
the LCs, e.g., at the end of the plateau emission or where a jet break is
identified.
