Airtightness Test Planner is a free, single-file tool for preparing whole-building airtightness test plans from construction PDFs. Open a PDF: mark up the tested boundary, blower-door locations, interior and exterior reference tubes, temporary seal locations, and any notes or RFIs, then export a clean plan as a PNG or PDF.
Click Open PDF (or drop a file anywhere on the workspace). Multi-page PDFs load every page — use the ◀ ▶ arrows or PageUp/PageDown to move between them. Each page keeps its own annotations and undo history.
| Select & Move | Click to select; drag to reposition; double-click to edit text on manometers, callouts, and RFIs. Drag empty space to pan. |
| Tested Boundary | Click to add a boundary around the pressurized volume. Return the line to the first point (or double-click) to close the polygon. Closed boundaries stay highlighted in orange. |
| Blower Door Fan | Multi-point red line. Drag near a manometer port to snap to a channel. |
| Exterior Reference | Green line indicating an exterior envelope reference tube. |
| Interior Reference | Blue line with arrowhead indicating an interior envelope reference tube. |
| Temp Seal Area | Click & drag to draw a dashed ellipse marking a temporary seal (door, vent, damper, etc.). |
| Manometer | Places a dual-channel unit with four ports (A-Input, A-Ref, B-Input, B-Ref). Enter its serial number. Connected lines follow the manometer when moved. |
| Text Callout | Adds a yellow note with a leader line. Drag the dot to relocate the leader endpoint. |
| RFI / Issue Tag | Adds a red tag for open questions or field conditions that need clarification. |
| Place Key / Legend | Drops a KEY legend box onto the plan, auto-populated with the symbols you've used. Drag it to wherever fits best. |
| Shift (hold) | Lock your in-progress drawing line to 0° / 90° from last point. |
| Space (hold) | Pan the view while dragging. |
| Scroll wheel | Zoom in / out, centered on the cursor. |
| Esc | Cancel an in-progress line or boundary. |
| Delete / Backspace | While drawing: remove the last point placed. Otherwise: delete the selected item. |
| Ctrl+Z / Ctrl+Y | Undo / Redo (per page). |
| PageUp / PageDown | Previous / next page. |
Export PNG saves the current page as a high-resolution image with the auto-generated KEY legend. Export PDF writes every page into a single PDF file, ready to share with the client, GC, or field crew.
Airtightness Test Planner was developed by Green Mountain Enclosure Consulting LLC. This app is designed for professional airtightness testers, building enclosure consultants, and commissioning agents. Your PDF never leaves your computer — all rendering and markup happens locally in the browser.
This tool is free. If it's saved you time, tips are welcome: ☕ Buy me a coffee.
Manufacturer-neutral. Icons and line styling are conventions, not endorsements. Feedback & feature requests are always welcome.
This tool is free and ad-free, built and maintained on nights and weekends. If it's saved you time on a test plan, a small tip helps keep it that way — no subscriptions, just a one-time thank-you.
☕ Buy me a coffee