For iOS 12.5.7, you can perform a semi-untethered jailbreak without a computer using tools like through third-party Safari-based app stores Primary No-PC Tools

Jailbreaking iOS 12.5.7 without a computer is a popular way to breathe new life into older devices like the iPhone 5s, iPhone 6, and iPhone 6 Plus. This method allows you to install Cydia or Sileo directly from your device's browser, bypassing Apple’s strict app restrictions. Top Tools for iOS 12.5.7 (No PC)

Watch this step-by-step guide to see how the process works directly from Safari:

Why Jailbreak iOS 12.5.7?

bootstrap, making it faster and more compatible with modern tweaks than older tools.

Unc0ver: A widely used tool that supports iOS 11.0 through 14.8. While often sideloaded via a PC, "no computer" versions sometimes appear on signing services. How to Jailbreak iOS 12.5.7 Without a PC

: A popular option for iOS 12.5.7. It is often installed via third-party app stores like ipa-apps.me