A sharp first pass on
every drawing.
Upload a scan or PDF and Redliner returns a structured, code-aware review — severity-ranked findings, RFIs to send back, and coordination checks — in minutes. Catch the expensive stuff before permit, pricing, or the field.
No account needed · Your drawings stay private · PDF & Word export
From upload to redlines in three steps
No setup, no training a model, no waiting on a queue.
Upload your drawing
Drag in a PDF or scanned sheet set. Tell us the discipline (or let Redliner auto-detect it) and the province.
We review it
Redliner reads every sheet and checks it against the right Canadian codes and a discipline-specific engineering playbook.
Get the findings
A clean report with severity-ranked findings, RFIs, coordination checks, and a pass/fail summary — ready to export and send.
Every trade, the right standards
Pick a discipline and Redliner applies the codes that matter — or auto-detects it from the title block.
Constructability & coordination
Clashes, clearances, missing supports, and cross-discipline mismatches between schedules, loads, and penetrations.
Code & safety
Working clearances, egress, fire separations, grounding, and provincial amendments (OBC, OESC, BC, Quebec, Alberta).
Sanity checks & RFIs
Rough load/capacity math where the numbers allow, plus ready-to-send RFI wording for anything unclear.
Cold-climate aware
Frost depth, freeze protection, and the details that bite on Canadian projects but get missed elsewhere.
What you get back
A structured report you can act on — severity-ranked findings, RFIs to send back, and a clear verdict. Export to PDF or Word in one click.
| # | Severity | Finding | Recommended action |
|---|---|---|---|
| 1 | Critical | Climatic loads listed for Fort McMurray, but the project address is in Calgary. | Revise all snow / wind / seismic loads for the actual location. |
| 2 | High | No seismic restraint shown for the roof-mounted equipment. | Add restraint details per NBC 4.1.8.18. |
…plus RFIs to send back, cross-discipline coordination checks, and a full pass / fail checklist.
Start a review
Upload a drawing and we'll get to work. It's free to try — no account needed.
Questions, answered
Is this a stamped engineering review?
No. Redliner is a first-pass quality-control aid to catch issues early. It does not replace review, stamping, or sign-off by a licensed professional engineer.
What can I upload?
Vector PDFs (the kind exported from CAD) work best, but scanned sheets and image files are supported too. Single sheets or full sets, up to 50 MB.
Which codes does it use?
The Canadian model codes — NBC, the National Plumbing and Fire Codes, and the Canadian Electrical Code — plus the relevant CSA standards and the provincial amendments for the jurisdiction you select.
Are my drawings kept private?
Your upload is used to produce your review and is stored only for your access to the results. We never display it publicly.
Can I export the findings?
Yes — every review can be downloaded as a polished PDF or an editable Word document, or as raw Markdown.
Put a second set of eyes on it.
Free to try. Upload a drawing and see what Redliner catches.
Review a drawing