条形码生成NEW
Code 128 / EAN-13 / Code 39 条码
Checking your access…
AllFreeTool is a free online barcode generator that creates scannable barcodes in Code 128, EAN-13, UPC-A and Code 39. You type the content, choose the symbology, set the colours, the module width and the bar height, then download the result as an SVG vector file or a PNG image. The encoder is hand-written and runs in your browser, so your data is never uploaded.
It suits labelling stock for a small shop, putting a product code on an invoice or a shipping label, coding inventory items, or generating a Code 128 for a customer record. The SVG export is the one to choose for print, because a vector barcode stays sharp at any size, while the PNG export is convenient for slides and screens.
Why use 条形码生成 on AllFreeTool?
Four Symbologies
Generate Code 128, EAN-13, UPC-A and Code 39 barcodes with automatic check digits.
Full Appearance
Set the foreground and background colours, the module width, the bar height and the text.
Vector and Raster
Download an SVG that scales without blurring, or a PNG at the width you need.
Local Encoding
A hand-written encoder runs in your browser, so no barcode content is transmitted.
How to use 条形码生成
Enter the Content
Type the value to encode and pick the symbology that matches your use.
Adjust Appearance
Set the colours, the module width, the bar height and whether the text is printed.
Download
Check the preview and download the SVG or the PNG for your label.
Common questions
Which barcode format should I use?＋
Code 128 encodes any alphanumeric content and is the usual choice for internal stock and inventory labels. EAN-13 and UPC-A are the retail formats for products with a printed barcode, and Code 39 suits older label printers and equipment that cannot manage Code 128.
Are the check digits calculated for me?＋
Yes. EAN-13 requires twelve digits and the thirteenth check digit is computed automatically, and UPC-A works the same way with its twelve digit form. If you enter a non-digit value for those formats, the tool tells you that only numbers are accepted rather than producing an invalid code.
Should I download SVG or PNG?＋
Use the SVG when the barcode is going to a printer, a label maker or a large sign, because a vector file stays perfectly sharp at any size. The PNG is the better choice for a presentation, a web page or a screen, and you can set its pixel width directly.
Will the generated barcode scan reliably?＋
The preview matches exactly what is exported, so you can check the result before printing. Keep a good contrast between the foreground and background colours, leave a quiet margin around the code, and always verify a printed sample with your scanner before producing a whole batch.