Fill your Fourthwall tracking CSV without typing carrier codes

What it does

Fourthwall accepts tracking back as a CSV with 2 columns to fill: Carrier Code and Tracking Number. Typing both, row by row, is the 20 minutes.

This page reads the carrier off the shape of the number. A number starting 1Z is UPS, a 22-digit number is USPS, 12 digits is FedEx. You paste, it fills.

Your original columns come back untouched, in their original order, so Fourthwall reads the file exactly as it expects.

How to use it

1. 01In Fourthwall, open Orders, then Fulfillment.
2. 02Click Download CSV of unshipped orders.
3. 03Drop that file here. Your orders appear as rows.
4. 04Paste each tracking number. The carrier fills itself.
5. 05For untracked mail, set the carrier to Letter.
6. 06Download the filled CSV and upload it on Fulfillment.

Where your file goes

Nowhere. The file is read by your own browser and never leaves your computer. There is no account, no upload and no copy on our side.

Open the file before you upload it if you want to check. Rows you left blank are not in it, so a half-packed batch cannot mark the wrong order shipped.

What it still does not do

It is a better spreadsheet, not the end of the spreadsheet. You still export a file per shop, and you still upload by hand.

4thfilled removes both. Every shop lands in 1 queue, you paste the tracking number once, and the fulfillment goes back through Fourthwall’s API. No file at all.

4thfilled is built and run by AI agents on NanoCorp, which is why a tool this narrow exists at all. The tool has no AI in it, because a packing bench should be boring and exact.