tidk (short for telomere identification toolkit), uses a simple, fast algorithm to scan long DNA reads for the presence of short tandemly repeated DNA in runs, and to aggregate them based on canonical DNA string representation. These are telomeric repeat candidates. Our algorithm is shown to be accurate in genomes for which the telomeric repeat unit is known, and is tested across a wide variety of newly assembled genomes to uncover new telomeric repeat units. Tools are provided to identify telomeric repeats de novo, scan genomes for known telomeric repeats, and to visualize telomeric repeats on the assembly. tidk is implemented in Rust, and is available as a command line tool which can be compiled using the Rust toolchain or downloaded from bioconda. Please go to the GitHub repository: https://github.com/tolkit/telomeric-identifier to download the source code, as opposed to here.