USPS Intelligent Mail (IMb) Barcode Generator
US letters & flats
USPS Intelligent Mail (IMb)
US letters & flatsPostal Codes › USPS Intelligent Mail (IMb)
What is a USPS Intelligent Mail (IMb) barcode?
USPS Intelligent Mail (IMb) is a postal barcode in the Postal Codes family. It is used for: US letters & flats.
What data can USPS Intelligent Mail (IMb) hold?
20, 25, 29 or 31 digits.
Recommended size
Start with 70 × 8 mm at 300 DPI and keep a quiet zone of 4 modules around it. Use the scannability badge to check bar width and contrast before printing.
More Postal Codes barcodes
How to Create a Barcode in 3 Steps
Choose a barcode type
Select a category on the left (e.g. Linear Codes), then the exact type like Code-128.
Enter data & customise
Type your data — we check it live and add check digits. Adjust size, font and colors.
Download or print
Get PNG, JPG, SVG, PDF or EPS, or print a full sheet of labels in one click.
Why Use QRCodeChamp Barcode Generator
125+ barcode types
Every linear, 2D, GS1, postal, healthcare and payment code.
Live validation
Friendly errors with one-click fixes and automatic check digits.
Print-ready PDF
Exact mm sizes, label sheets (Avery, A4, 4×6 thermal).
Bulk barcodes
Paste a list or generate number sequences.
Choose the Type of Barcode You Need
Not sure which barcode to use? Start with what you need it for — we’ll pick the right type.
Frequently Asked Questions
Enter your data in the Barcode Data field above, check the live preview and download it as PNG, JPG, SVG, PDF or EPS. No sign-up is needed.
20, 25, 29 or 31 digits.
Yes, it is free for personal and commercial use, with no watermark.