Check the spec
Lengths and check-digit rules for this postal symbology are listed above.
Free tools · Logistics
Generate Royal Mail Mailmark 2D postage symbols.
Royal Mail 2D Data Matrix: 45 characters of structured data plus customer payload. Enter 45-char structured block + customer data for Royal Mail Mailmark 2D 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 | Royal Mail specifications |
|---|---|
| Character set | Spaces are significant — at least the 45-character structured block. Pick a type that fits the length. |
| Lengths | 45-char structured block + customer data |
| 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 | Spaces are significant — at least the 45-character structured block. Pick a type that fits the length. |
Usage
Royal Mail Mailmark 2D routes United Kingdom mail through automated sorters: print it on envelopes and parcels where United Kingdom carriers expect it.
- Royal Mail Mailmark 2D on envelopes for United Kingdom automated sorting
- Royal Mail Mailmark 2D on parcels with the example JGB 012100123412345678AB19XY1A 0 www.xyz.com as a starting point
- Royal Mail Mailmark 2D proofs exported as SVG for print-safe output
Shape
Pros
- Royal Mail Mailmark 2D is accepted by United Kingdom 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
- Royal Mail Mailmark 2D 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 45-char structured block + customer data.
- Spaces are significant — at least the 45-character structured block. Pick a type that fits the length.
- Preview and downloads stay withheld until local verification passes where a reader exists.
Sources
- Royal Mail barcode specifications (Royal Mail)
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
Royal Mail Mailmark 2D Generator & Specs, answered.
If you manage servers by hand, see the engineering services behind this tools series.
What do I type for Royal Mail Mailmark 2D?
Spaces are significant — at least the 45-character structured block. Pick a type that fits the length. Try the example JGB 012100123412345678AB19XY1A 0 www.xyz.com first.
Does Royal Mail Mailmark 2D need a check digit?
Spaces are significant — at least the 45-character structured block. Pick a type that fits the length. 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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