Check the spec
Lengths and check-digit rules for this postal symbology are listed above.
Free tools · Logistics
Generate USPS POSTNET (check supplied) postage symbols.
POSTNET 6/10/12-digit form where the final check digit is already supplied. Enter 6, 10 or 12 digits including check for USPS POSTNET (check supplied) below — lengths and check digits validate instantly in your browser before the symbol renders.
Postal barcode generator
Pick a post, type the data.
Runs locally in your browser. Nothing is uploaded; validation errors name the exact rule.
Style (module size, bar height, readable text)
Rendering symbol…
Specification
| Standards | USPS postal specifications |
|---|---|
| Character set | Final digit is validated locally and by BWIPP. |
| Lengths | 6, 10 or 12 digits including check |
| Check digits | Check-digit rules enforced by the native engine; see input hint. |
| Quiet zone | Calm quiet zones on both sides; pure black on white for sorter readability. |
| Capacity | Final digit is validated locally and by BWIPP. |
Usage
USPS POSTNET (check supplied) routes United States mail through automated sorters: print it on envelopes and parcels where United States carriers expect it.
- USPS POSTNET (check supplied) on envelopes for United States automated sorting
- USPS POSTNET (check supplied) on parcels with the example 012340 as a starting point
- USPS POSTNET (check supplied) proofs exported as SVG for print-safe output
Shape
Pros
- USPS POSTNET (check supplied) is accepted by United States sorting automation.
- Lengths and check digits validate instantly with the exact rule named.
- SVG export stays sharp for envelopes and parcel labels.
- The symbol is read back locally before preview unlocks where a reader exists.
Cons
- USPS POSTNET (check supplied) is single-purpose — it carries postal data, not general text.
- Wrong lengths or missing check digits are rejected instead of printed.
- Low contrast or tight quiet zones fail high-speed sorters first.
- Screenshots prove encoding, not sorter-grade print quality.
Form requirements
- Enter 6, 10 or 12 digits including check.
- Final digit is validated locally and by BWIPP.
- Preview and downloads stay withheld until local verification passes where a reader exists.
Sources
- USPS Intelligent Mail specifications (USPS)
Related formats
Keep exploring.
How it works
Three steps, all on your device.
The same engine that prints parcel labels worldwide, running in your browser.
Type the data
The on-device engine enforces the rest and appends check digits where the standard says so.
Verify, then print
The symbol is rasterized and read back locally before preview and downloads unlock.
Questions
USPS POSTNET (check supplied) Generator & Specs, answered.
If you manage servers by hand, see the engineering services behind this tools series.
What do I type for USPS POSTNET (check supplied)?
Final digit is validated locally and by BWIPP. Try the example 012340 first.
Does USPS POSTNET (check supplied) need a check digit?
Final digit is validated locally and by BWIPP. The engine computes or verifies it and names the expected digit on mismatch.
Is my data uploaded anywhere?
No. Encoding and verification run entirely in your browser — the page makes no network requests with your data, stores nothing, and wipes the field after ten idle minutes.
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