Check the spec
Capacity, error correction and shape controls for this symbology are listed above.
Free tools · Barcodes
Generate Codablock F symbols that scan.
Stacked Code 128 format composed of 2 to 44 rows with 4 to 62 columns. Configure Codablock F below — Code 128 characters, 2–44 rows, 4–62 columns. Up to ~2725 alphanumeric characters. Every symbol is decoded again on your device before export.
2D code generator
Type text, get a symbol.
Runs locally in your browser. Nothing is uploaded; the field clears after ten idle minutes.
Advanced (error correction, shape, GS1)
Style (colors, frame, caption, export size)
Codablock F stays black on white until this output path has an independent color/raster qualification.
Outer frame
Frame and caption ship in the SVG download; PNG exports the bare symbol.
Specification
| Standards | AIM USS-Codablock / ISO/IEC 15417 |
|---|---|
| Character set | Code 128 characters, 2–44 rows, 4–62 columns. Up to ~2725 alphanumeric characters. |
| Lengths | Code 128 text (ASCII 0–127) |
| Check digits | Error correction fixed by the symbology or QR-studio owned. |
| Quiet zone | Specification quiet zone enforced in preview and export (2 modules minimum for matrix symbols). |
| Geometry | Stacked Symbologies; engine selects the smallest fitting symbol unless pinned. |
| Capacity | Up to ~2725 characters here; the engine enforces exact capacity. |
Usage
Codablock F stacks rows of data for documents and transport labels: print it wide on paperwork where stacked-row imagers operate.
- Codablock F on shipping documents carrying addresses and IDs
- Codablock F on industrial labels with pinned rows and columns
- Codablock F proofs exported as SVG for laser printers
Shape
Pros
- Codablock F scans on modern phone and industrial imagers.
- Every symbol is read back locally before preview or download.
- SVG export stays sharp for print; PNG covers quick sharing.
- Only the controls this symbology accepts are shown.
Cons
- Codablock F needs calm quiet zones — nearby text breaks detection.
- Glare, blur and low contrast are the usual reasons a symbol will not read.
- Screenshots prove scannability, not print quality grading.
- Custom colors stay locked until contrast and tinted re-decode pass.
Form requirements
- Enter Code 128 text (ASCII 0–127).
- Code 128 characters, 2–44 rows, 4–62 columns. Up to ~2725 alphanumeric characters.
- Downloads stay locked until the local read-back reproduces the payload.
Sources
- AIM symbology specifications (AIM)
Related formats
Keep exploring.
How it works
Three steps, all on your device.
The same engine that reads 2D codes writes them — every symbol is decoded again before you see it.
Tune and style
Only the controls this symbology accepts are shown; every symbol is read back to prove it scans.
Download and print
Take a resolution-independent SVG or a PNG at your chosen module size. Nothing is uploaded.
Questions
Codablock F Generator & Specs, answered.
If you manage servers by hand, see the engineering services behind this tools series.
What can I encode in Codablock F?
Code 128 characters, 2–44 rows, 4–62 columns. Up to ~2725 alphanumeric characters. Example input is prefilled when the page loads.
How does Codablock F stay scannable?
Error correction fixed by the symbology or QR-studio owned. Keep the quiet zone calm, use black-on-white for print, and export SVG for anything that gets resized.
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.
Related tools
More from the free-tools series.
Every tool runs entirely in your browser — no accounts, no uploads.
BARCODE / GENERATE
Barcode Generator
Generate EAN, UPC, ISBN, GS1 DataBar, Code 128, Code 39, Telepen and more 1D codes — validated and scan-verified in your browser.
Open the toolBARCODE / SCAN
Barcode Reader & Scanner
Decode 1D, 2D and postal barcodes from an uploaded image or your camera, with honest format and profile details. Nothing is uploaded anywhere.
Open the toolSSH / KEYS
PPK to OpenSSH Converter
Convert private keys between PuTTY .ppk, OpenSSH and legacy PEM formats — both directions, encrypted keys supported. Your key never leaves your browser.
Open the tool