We have a bulk URL processing feature, which is a useful and quick way to analyze a batch of URLs for readability.
Go to readability tools → bulk score URLs.
You'll then be prompted to upload a CSV file.
In order to score URLs in bulk, you will need to create a CSV file of your URLs. Not sure what a CSV is? Here's an introduction to CSVs.
You should have one URL per row, in the first column, and nothing else in the CSV.
When you've created your CSV, upload it here and it will be processed as a normal file, with the results visible on the File page when complete.