Gmailcheck is an online tool for checking whether Google and Gmail accounts show signs of irregularity. Its screening program is designed to process account lists quickly and, according to the site, does not require users to provide account passwords. Users can enter accounts or upload a TXT or Excel file, then choose between a personal-account mode and a compatibility mode for business and personal accounts.

The service offers free and VIP checking routes, with the VIP3 option listed as supporting up to 300 checks per batch. Additional settings include duplicate detection, ignoring incorrectly formatted email addresses, and a detailed mode that may take longer. Results are organized into categories such as normal, requiring verification, nonexistent, disabled, and remaining accounts, with options to copy each category’s list.

Gmailcheck also provides data deduplication and splitting or recombination tools. The website includes account registration and login, password recovery, customer support, and advertising inquiries, as well as Chinese and English language options