I vibe-coded an application that merges entries from multiple log files into a single, chronologically ordered view. It handles timezone offsets and can auto-detect some timestamp formats, with an option to specify the format manually.

Files are processed on your device and not uploaded to a server.

It's all open source: https://github.com/jftuga/loglinealign

In the repo, there is a quick, 3 minute narrated explainer video as well as a CLI version.

Also, lnav does the same thing in a TUI and is more capable.