Paste, upload, or load an ATWL workflow to check it for syntax errors and cross-reference problems (undeclared artifacts, unclosed loops, unknown vocabulary), plus semantic warnings checked against the ATWL language definition (Table 6 intent/output types, required fields, reference types, acyclicity and graph completeness, loop termination and updates, exogenous artifacts). Open “What this checker verifies” below for the full list. If it checks out, the same statistics and diagrams shown in the Library Explorer's Library Explorer tab are computed live, right here.
Companion tools: ATWL Workflow Library Explorer · ATWL Motif Atlas · Library index
Released: 2026-10-01 16:13 UTC
Paste ATWL source directly into the box below, then click "Check ATWL".
Accepts a plain .atwl/.txt file, or an HTML case-study page containing an embedded ATWL source block (the same convention used by this library's own workflow pages) — the checker will extract it automatically.
Works for same-origin or CORS-enabled URLs. A workflow case-study page's embedded ATWL source is extracted automatically, same as Upload above. Cross-origin sites without CORS headers will be blocked by the browser — use Upload or paste instead if loading fails.