A worked example
A 140 × 90 mm center panel with 35 mm side flaps produces a 210 × 189 mm net, with overlapping closing flaps.
Envelope
Create a rectangular envelope with side, bottom and top flaps.
YOUR LITTLE WORKBENCH
ON YOUR DEVICE ✦Envelope
Loading your local workspace…
THE METHOD / 01
A clear wayfrom start to finish.
The center panel uses the entered finished dimensions. Side flaps fold first, the bottom overlaps them, and the top closes last.
Keep the assumptions clear
A simple paper envelope, without a seal or postal-service size certification.
A FEW USEFUL ANSWERS
Good to know.
Are my inputs uploaded?
No. Processing runs locally in your browser. The host still receives normal requests for website pages and assets.
Can I keep my result?
Use the download controls for the current tool or print from your browser. Your valid edits autosave in this browser. Export a JSON backup to move devices; see the privacy page.
Do I need an account?
No sign-up, paid API or subscription is required. Both languages use the same tools. English always opens at the root address.
FOLDKIND / TOOLKIT