Runs entirely in your browser

Paste your own COBOL. See it parsed instantly.

Nothing is uploaded. Nothing is sent to a server. This is the same structural extraction MainframeLore runs on every program in an estate — paragraphs, PERFORM flow, COPY, CALL, file assignments, SQL tables, CICS commands — running client-side, live, on whatever you paste below.

Paste COBOL source

Highlighted structure

Paste code on the left, then click Parse.

This is the free layer. The real product goes further.

Full estate-wide dependency graphs, plain-English AI documentation grounded in resolved copybook definitions, and a cited Q&A assistant — across your entire codebase, not one pasted file.

See the live Q&A demo →