Interleaved 2 of 5 Barcode Generator
Generate an Interleaved 2 of 5 barcode from a string of digits for warehouse labels, cartons, airline tickets and industrial tracking. Interleaved 2 of 5 encodes pairs of digits in bars and spaces, which keeps the symbol short. The tool pads odd lengths with a leading zero and draws the barcode as a PNG image or an SVG file with adjustable scale, height and text.
Frequently asked questions
What can I encode with Interleaved 2 of 5?
Digits only, up to 80 in this tool. Spaces and hyphens are removed before encoding, and letters or other symbols are rejected with a message.
Why was a zero added to my number?
Interleaved 2 of 5 encodes digits in pairs, one in the bars and one in the spaces, so it needs an even number of digits. When you enter an odd number of digits the tool adds a leading zero, which is the usual convention.
Does the tool add a check digit?
No. Interleaved 2 of 5 has no mandatory check digit, and the tool encodes the digits as entered. If your application requires one, include it in the number. For GS1 cartons use the ITF-14 Barcode Generator, which handles the check digit.
Which format should I choose for the Interleaved 2 of 5 barcode?
SVG is a vector file that stays sharp at any size, which suits print artwork and design software. PNG is a raster image that works everywhere, including office documents and label printers. Both have a white background and a white margin around the symbol.
What do the scale and height settings do?
The scale from 1 to 10, default 3, multiplies the width of every bar and space. The bar height accepts 5 to 50 millimeters and defaults to about 25 millimeters.
Can I hide the printed digits?
Yes. Turn off the human readable text option to draw only the bars.
Why do some scanners read only part of the barcode?
Interleaved 2 of 5 has no fixed length, so a scan that misses part of the symbol can look like a shorter valid code. Configure your scanner to accept only the length you use, or keep the margin clear and the bars tall so the scanner sees the whole symbol.
Where is Interleaved 2 of 5 used?
It is common on corrugated cartons, in distribution centers, on airline baggage and in some industrial and medical labeling, wherever only numbers are needed and the label should stay short.
Is there a size limit?
The output may be at most 4000 pixels on a side. Long numbers at a high scale can exceed that, and the tool then asks for a lower scale.
Is my data stored?
No. The digits are used only to draw the barcode you download.