Exact-size browser-local PDF
Envelope Template and Generator
Create an address-print PDF sized for an A2, A7, or #10 envelope. No address information is uploaded or stored.
Address an envelope
Address-print mode for an existing envelope. This does not create a cut-and-fold dieline.

Print calibration
Choose the matching envelope size, use 100% or Actual Size, confirm orientation, and test on plain paper. Printer hardware and drivers can impose margins.
Address placement
The return block begins 0.35 inch from the left and about 0.42 inch from the top. The recipient block begins at 47% of envelope width and near the vertical center.
Limitations
This is not a postal-approval or universal-printer guarantee. It produces exact-size PDF pages but cannot control a printer's feed path or hardware margins.