THE DEVELOPER BLOG

How to generate barcodes online using Converteasly – complete step-by-step guide

Posted on September 27, 2026

Barcodes are one of the simplest ways to store product, inventory, or tracking data in a machine-readable format. Whether you are labeling products, managing warehouse inventory, or creating internal asset codes, a barcode generator helps you create accurate and professional barcode labels without installing any software.

The Barcode Generator from Converteasly is a free online tool that lets you generate single or multiple barcodes quickly. It gives you control over the barcode value, type, appearance, and final output format, making it useful for both personal and business needs.

What Can You Do With Barcode Generator? 🌄

This tool is designed for users who need a fast and easy way to create high-quality barcodes. You can:

  • Generate a single barcode from a manual value
  • Create multiple barcodes from a CSV file in bulk
  • Change the barcode format based on your use case
  • Customize the foreground and background colors
  • Adjust text size, margins, bar width, and bar height
  • Download the barcode as SVG, PNG, or PDF
  • Print directly from the browser
  • Copy the SVG output for web or design use

Step-by-Step Guide To Use Barcode Generator 🧭

Step 1: Open the barcode generator tool

Visit the Barcode Generator page in your browser. The interface is simple and responsive, so it works well on desktop, laptop, tablet, and mobile devices.

Step 2: Enter the barcode value

In the main barcode input area, enter the value you want to convert into a barcode. For example, a product or asset code such as 5901234123457 can be used for an EAN-13 barcode.

This value should match the barcode format you select. If the value is invalid for the chosen type, the tool will show a validation message so you can correct it before generating the final barcode.

Step 3: Select the barcode format

Choose the correct barcode format before generating the barcode. The tool supports standard barcode types used in retail, inventory, shipping, and document labeling. Common examples include:

  • EAN-13
  • UPC-A
  • CODE128
  • CODE39
  • ITF and other widely used formats

Selecting the right format is important because each barcode type has its own value rules and length requirements.

Step 4: Customize the barcode appearance

This is where the tool becomes very practical. The generator includes several options that let you edit the visual appearance of the output.

1. Foreground color

This sets the dark or main barcode color. You can change it to match your brand colors, labels, or print preferences. A black barcode is the default and is the most readable option for printing.

2. Background color

This changes the area behind the barcode. A white background is typical for product labels and printing, but you can switch to a different color if needed for contrast or branding.

3. Font size

The text displayed beneath or near the barcode can be adjusted with the font size control. Larger text makes the code easier to read, while smaller text is useful when you need to save space on labels.

4. Margin

Margin defines the empty space around the barcode. Increasing the margin creates cleaner labels and ensures the barcode does not appear crowded or cut off when printed.

5. Bar width

This controls the thickness of the individual barcode bars. Increasing bar width makes the barcode more prominent and easier to scan at a distance, while reducing it helps if you need a compact label.

6. Bar height

The bar height controls the overall vertical size of the barcode. Taller bars can improve scan reliability in certain environments, while shorter bars are better for compact packaging or small labels.

Step 5: Preview the barcode live

The tool shows a live preview as you modify the settings. This helps you immediately see how the barcode looks before downloading or printing it. The preview updates in real time, so you can quickly test different combinations of size, color, and spacing.

Step 6: Download or export the barcode

Once the barcode looks correct, you can export it in several ways:

  • Copy SVG: useful if you want to paste it into a design tool or keep a vector version
  • Download SVG: ideal for scalable graphics without quality loss
  • Download PNG: good for quick sharing, printing, and online use
  • Export PDF: useful when preparing printable barcode sheets or product labels
  • Print: sends the barcode directly to the browser print dialog

This gives you flexibility depending on whether you need a digital file, product label, or printable document.

Batch Barcode Creation Using CSV Upload 📤

If you need to generate many barcodes at once, the tool also supports batch processing using a CSV file.

How to use batch mode

  1. Click on the CSV upload option.
  2. Select your CSV file.
  3. Make sure the first row is treated as a header if your file includes column titles.
  4. Use the expected columns: value and format (optional).
  5. Upload and generate multiple barcodes in one go.

This is especially useful for:

  • Product inventory lists
  • Warehouse stock codes
  • Asset tags
  • Bulk product labeling
  • Shipping and packaging workflows

The ability to generate barcodes in bulk saves significant time compared with creating each barcode manually.

All Available Editing Options Explained In Detail 🛠️

The barcode generator gives you enough control to make the output fit different business and personal use cases. Here are the main editable options available:

Barcode value

This is the main data encoded inside the barcode. It could be a product code, inventory ID, shipment number, or any other string that matches the selected format.

Barcode format

This controls how the value is encoded. Different formats support different kinds of data and have different validation rules. Choosing the correct type is essential for readability and scanning accuracy.

Foreground and background color

These two controls affect the contrast and final appearance of the barcode. A strong contrast improves scanning reliability and helps keep the label readable.

Font size

Some barcode formats include a human-readable text label beneath the barcode. You can increase or decrease the font size to improve readability and match your label design.

Margin

A margin around the barcode ensures it has enough surrounding whitespace for printing and scanning. This is especially useful when placing the barcode on packaging or labels.

Bar width

This changes the thickness of the barcode bars. A wider bar pattern is easier to scan from a distance, while a narrower one fits small label space more efficiently.

Bar height

This controls the vertical size of the barcode. Taller barcodes usually improve scanning reliability, especially when the barcode is placed in a visible but compact area.

CSV batch input

This lets you process multiple values at once. It is useful when your business needs dozens or hundreds of codes generated at the same time.

Export type

The tool gives you several export methods so the barcode can be used in different workflows:

  • SVG for scalable vector graphics
  • PNG for quick digital sharing and print-ready images
  • PDF for printable barcode documents
  • Print for direct output to paper
  • Copy SVG for designers and web applications

Best Practices For Barcode Creation ✅

To get the best results, keep these points in mind:

  1. Always choose the right barcode format for your data.
  2. Use high contrast between foreground and background.
  3. Keep enough margin around the barcode for clean printing.
  4. Test the barcode before mass printing or labeling.
  5. Use batch mode when generating many codes together.
  6. Export to PDF or PNG depending on your final usage need.

Use Cases Of Barcode Generator 📦

The tool is useful in a wide range of situations:

Retail and product labeling

Retail businesses can generate barcodes for product packaging, price tags, and inventory labeling.

Inventory and warehouse management

Warehouses can create barcodes to track stock, storage bins, and assets efficiently.

Shipping and logistics

Logistics teams can generate shipment codes and package labels to streamline order tracking.

Healthcare and labs

Hospitals and labs can use barcodes for patient records, sample tracking, and equipment identification.

Manufacturing and asset tracking

Manufacturers can generate barcodes for machinery, components, and completed goods.

Libraries and education

Schools and libraries can create barcodes for books, student IDs, and resource tracking.

E-commerce and marketplace sales

Online sellers can reduce manual work by generating product codes for inventory and order handling.

Small business and personal use

This tool is also useful for home-based businesses, event management, collections, and simple labeling projects.

Why Use Converteasly Barcode Generator? 🚀

Converteasly makes barcode creation very easy for users who do not want to install heavy software or use complicated design tools. Some of the main advantages are:

  • Free to use
  • No signup required
  • Simple and responsive interface
  • Real-time preview
  • Customization options for appearance and size
  • Flexible export formats
  • Works quickly on desktop and mobile devices
  • Batch generation for multiple barcodes

Final Thoughts

The Barcode Generator is an excellent tool for anyone who needs to create plain, readable, and professional barcodes quickly. It is suitable for both individual and business use, and the number of editing options makes it flexible enough for many scenarios.

From selecting the format and adjusting colors to printing or exporting in PDF, PNG, or SVG, the tool gives you full control over your barcode result. If you need a fast, free, and reliable way to generate barcodes online, this is a practical solution to consider.

Generate Barcode



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