Choose what to open
Open a session file or authorize a folder through the macOS file picker. Trailglass reads supported Codex, Claude Code, Pi, and JSON records.
Trailglass · macOS 14+
Read local agent conversations, inspect tool activity, and find the original record.

Inside Trailglass
Start with a session, stay with the conversation, and switch to Research when the details matter. These images use clearly labeled example sessions.
Open a session file or authorize a folder through the macOS file picker. Trailglass reads supported Codex, Claude Code, Pi, and JSON records.
Browse keeps the conversation readable. Research reveals the normalized event stream, tool calls, results, and warnings.
Inspect metadata and usage details, then open Raw JSON when you need to compare an event with its original record.
Search messages and events, narrow the view with filters, and follow sessions as authorized files change.
Export a readable transcript or save results to a location you select. Your original session files are not modified.
Load the included sample session to explore the interface without connecting an agent or opening a private log.
Local by design
Trailglass processes the session files you choose locally. It does not upload their contents for analysis. It is an independent viewer, not an AI-agent service.
Read the privacy policy →Ready to take a closer look?
Get Trailglass for MacAll inspection features are included. No account or subscription required.
Look closer at your local sessions.