Sk Key Checker Jun 2026

The batch mode accepts .txt or .csv files. I fed it a list of 50 Steam keys purchased from a third-party reseller. SK Key Checker churned through them at roughly 1 key per second. The results were color-coded: green (valid), yellow (used), red (banned). It even flagged two keys as “region-locked” – something the reseller didn’t disclose. That alone saved me $60 in potential chargebacks.