Barcode Generator – Create Barcodes Online Free

Free Barcode Generator — Create Printable Barcodes Instantly

This free online barcode generator lets you create high-quality, scannable barcodes for products, inventory, shipping labels, books, coupons and internal business systems — all without installing software, creating an account or paying a subscription. Choose a barcode type, type your data, and watch the barcode render live in your browser as you type. When it looks right, download it as a PNG, SVG, JPG, WEBP or PDF file, or send it straight to your printer. Every barcode is generated locally using JavaScript, so your data is never uploaded to a server.

What Is a Barcode?

A barcode is a visual, machine-readable representation of data. Traditional 1D (linear) barcodes encode information as a series of parallel black bars and white spaces of varying widths. A barcode scanner shines a beam of light across the pattern, measures the reflected light, and decodes the bar and space widths back into the original numbers, letters or symbols. Because scanning takes a fraction of a second and is far more accurate than manual data entry, barcodes became the backbone of modern retail, logistics and inventory tracking soon after their invention in the 1970s.

How Barcode Scanning Works

Every barcode symbology defines a strict set of rules for how characters map to bar and space widths, where the barcode starts and ends, and often a checksum digit to catch scanning errors. When you type text into this tool, the underlying JavaScript library looks up each character in the symbology's encoding table, builds the correct sequence of bar widths, calculates any required check digit, and draws the result as vector or canvas graphics. A laser or camera-based scanner performs the reverse process: it measures each bar and space, matches the pattern against the same table, verifies the checksum, and outputs the decoded value to whatever system it's connected to — a point-of-sale terminal, a warehouse management system, or a mobile app.

How to Use This Barcode Generator

Types of Barcodes Supported

Not every barcode format is built for the same job. This barcode maker supports every major symbology in commercial use today, organized by the industries and use-cases they were designed for:

Barcode Type	Data Type	Common Use
Code 128	Full ASCII	Shipping, logistics, general purpose
Code 39	Alphanumeric	Automotive, defense, inventory labels
Code 93	Alphanumeric	Denser alternative to Code 39
EAN-13 / EAN-8	Numeric	Retail products worldwide
UPC-A / UPC-E	Numeric	Retail products in North America
ISBN	Numeric (13-digit)	Books and publications
ISSN	Numeric (13-digit)	Magazines and periodicals
EAN-5 / EAN-2	Numeric add-on	Book pricing, magazine issue numbers
ITF / Interleaved 2 of 5	Numeric (even length)	Cartons, warehouse pallets
Standard / Industrial 2 of 5	Numeric	Photo processing, airline tickets
Codabar	Numeric + symbols	Libraries, blood banks, FedEx
MSI	Numeric	Inventory and warehouse shelf labels
Pharmacode	Numeric	Pharmaceutical packaging
GS1-128	Numeric + Application Identifiers	Shipping cartons with batch/date data
GS1 DataBar family	Numeric	Small produce & variable-measure retail items
Plessey	Hexadecimal	Shelf-edge labels, older retail systems
POSTNET	Numeric (ZIP)	US postal mail sorting (legacy)

Difference Between a QR Code and a Barcode

The classic barcode is a one-dimensional (1D) symbol — it stores data along a single horizontal axis of bars and spaces, which limits capacity to a relatively short string of numbers or characters, usually under a few dozen digits. A QR code is a two-dimensional (2D) matrix symbol that stores data in both the horizontal and vertical axis using a grid of black and white squares. This gives QR codes far higher data capacity — enough for full URLs, contact cards or paragraphs of text — and the ability to be scanned from any angle or even when part of the code is damaged, thanks to built-in error correction. In short: use a 1D barcode when you need a short, standardized product or item identifier that legacy retail scanners can read; use a QR code when you need to encode a link, larger block of text, or want built-in damage tolerance. If you need a QR code instead, try our dedicated QR Code Generator.

When to Use a Barcode

Barcodes are the right choice whenever you need a compact, universally-scannable identifier tied to a physical item, and the scanning hardware you're targeting is a traditional 1D laser or CCD scanner. They're ideal for retail point-of-sale, warehouse put-away and pick lists, asset tags, library check-outs, ticketing, and any workflow where speed and near-zero error rate at the checkout or receiving dock matters more than raw data capacity.

Industries That Rely on Barcodes

Advantages of Using Barcodes

• Speed — scanning takes milliseconds compared to manual keying.
• Accuracy — checksum digits catch most misreads before they reach your system.
• Low cost — barcodes can be printed on any standard printer with plain labels.
• Universal compatibility — nearly every point-of-sale and warehouse scanner reads the common formats.
• Traceability — combined with a database, barcodes make it easy to track an item's full history.

How to Generate a Barcode With This Tool

Start by choosing the correct symbology for your use case from the barcode type dropdown — this tool groups formats by category so it's easy to find the right one. Type your text or numbers into the input box; the barcode renders automatically with no separate "Generate" button to click. As you type, a live validation message tells you whether the input is valid for the selected format, and shows an example if something looks wrong. Open Advanced Options to fine-tune bar width, height, margin, colors, rotation, scale, and whether the human-readable text appears below the bars. Once you're happy with the result, use the download row to export a PNG, SVG, JPG, WEBP or PDF file, copy the image straight to your clipboard, or click Print Barcode to send it to your printer immediately.

Supported Barcode Formats — Full List

This tool supports the following symbologies: Code 128 (auto A/B/C mode switching), Code 39, Code 93, EAN-13, EAN-8, EAN-5, EAN-2, UPC-A, UPC-E, ITF (Interleaved 2 of 5), ITF-14, Standard 2 of 5, Industrial 2 of 5, Codabar, MSI, Pharmacode, GS1-128, ISBN, ISSN, Plessey, POSTNET, and the full GS1 DataBar family — DataBar, DataBar Expanded, DataBar Limited, DataBar Stacked and DataBar Omnidirectional. Whether you need a barcode generator for products, a barcode generator for inventory, or a barcode generator for business shipping documents, there's a format here that matches the job.

Printing Tips for Sharp, Scannable Barcodes

• Print at 100% scale — never let your print dialog "fit to page," which distorts bar widths.
• Use a resolution of at least 300 DPI; laser printers generally produce cleaner edges than inkjet for fine bar patterns.
• Keep strong contrast: dark bars on a light, matte background scan far more reliably than light-on-dark or glossy stock.
• Leave the quiet zone (blank margin) around the barcode untouched — text or graphics placed too close will cause misreads.
• Test-scan a sample print with the scanner or app you'll actually use in production before printing a full batch.

Common Barcode Mistakes to Avoid

• Using the wrong symbology for the destination system — for example, printing Code 128 when a retail POS expects EAN-13.
• Skipping the check digit on EAN/UPC formats, which causes scanners to reject the code entirely.
• Shrinking the barcode too small, which compresses bar widths below what standard scanners can reliably resolve.
• Low contrast colors, such as light gray bars, which look fine on screen but fail to scan when printed.
• Cropping the quiet zone when placing the barcode into a design layout.

Barcode Best Practices

Always match your barcode symbology and size to the specification required by the retailer, carrier or system you're integrating with — GS1 publishes exact size and quiet-zone standards for EAN/UPC and GS1-128 codes used in retail and logistics. Keep a consistent foreground/background contrast ratio, avoid rotating barcodes unless your scanner explicitly supports omnidirectional reading, and always keep an editable backup of the data you encoded in case you need to regenerate the barcode later at a different size.

Browser Privacy & Performance

Every barcode in this tool is rendered entirely client-side using JavaScript — nothing you type is ever transmitted to a server, logged, or stored. This makes it safe to generate confidential SKU numbers, unreleased product codes or internal tracking IDs. The tool is also built for performance: barcode rendering updates in real time as you type, images are generated on demand rather than pre-rendered, and there is no tracking, analytics pixel or unnecessary network request slowing down the page.

Why Choose ToolPlex's Barcode Generator

ToolPlex's barcode generator is completely free, has no watermark, requires no signup, and supports more symbologies than most competing tools — including specialized formats like GS1 DataBar, Pharmacode and Plessey that many free generators skip entirely. The live preview means what you see is exactly what gets exported, and five different export formats (PNG, SVG, JPG, WEBP, PDF) mean you'll rarely need to convert the file afterward.

A Brief History of the Barcode

The barcode traces back to a 1949 patent filed by Norman Joseph Woodland and Bernard Silver, who sketched out a bullseye-style symbol inspired by Morse code. It took more than two decades of falling laser and computing costs before the idea became commercially practical. On June 26, 1974, a pack of Wrigley's chewing gum became the first retail product ever scanned using the Universal Product Code (UPC) at a supermarket in Ohio — a moment now preserved in the Smithsonian. Since then, barcode symbologies have multiplied to serve postal sorting, pharmaceuticals, aerospace parts tracking, and virtually every supply chain on earth, evolving alongside 2D codes like QR and Data Matrix that emerged in the 1990s to handle richer data.

How the Check Digit Works

Most numeric barcode formats — including EAN-13, EAN-8, UPC-A and ITF-14 — end with a check digit calculated from every other digit in the code using a weighted modulo-10 algorithm. When a scanner reads the barcode, it re-runs the same calculation on the decoded digits and compares the result to the final digit in the symbol. If they don't match, the scanner silently rejects the read instead of passing a corrupted number to the till or database, which is why a single smudged or misprinted bar rarely causes a wrong item to ring up. This tool calculates the correct check digit automatically whenever you provide the digits without it — for EAN-13, for example, entering all 12 data digits is enough; the 13th check digit is computed and appended for you.

Choosing the Right Barcode Size

Barcode size is a trade-off between scan reliability and available label space. Every symbology has a minimum "X-dimension" — the width of its narrowest bar — below which most handheld scanners start to struggle, especially at longer scanning distances. As a general rule, keep the barcode at 100% or larger of the nominal size published by GS1 for retail formats like EAN-13 and UPC-A, and never scale a barcode down below about 80% of nominal size. For internal-use formats like Code 128 on a shipping label, you have more flexibility, but taller bars with a wider quiet zone on each side will always scan more reliably than a barcode squeezed into a tight corner of a label template.

GS1, GTINs and Registering Your Own Barcode Numbers

If you plan to sell a physical product through major retailers or e-commerce marketplaces, the product's EAN-13 or UPC-A number usually needs to be a Global Trade Item Number (GTIN) licensed through GS1, the non-profit organization that governs global barcode standards. GS1 issues a unique company prefix, and you assign item reference numbers underneath it, with the check digit calculated the same way this tool calculates it. Simply generating a barcode image — including with this tool — does not register a number with GS1; it only produces the printable symbol. For internal-only barcodes such as Code 128 labels used purely inside your own warehouse or POS system, no external registration is required at all since the numbers never need to be globally unique.

Barcode Generator for Excel, Inventory Sheets and Spreadsheets

A common workflow is generating a batch of barcodes to paste into a spreadsheet for inventory or product-catalog purposes. Because this tool renders each barcode instantly in the browser, you can generate one code at a time, download it as a PNG, and paste it into the matching row of an Excel or Google Sheets inventory list, repeating the process for every SKU. For very large catalogues, many businesses instead script the same encoding logic (Code 128, EAN-13, etc.) in bulk using a barcode library, then merge the resulting images with a mail-merge or label-printing tool — this generator is ideal for quickly checking that a symbology renders and scans correctly before committing to that larger workflow.

Barcode Generator Without Watermark, No Login Required

Many "free" barcode generators online quietly stamp a watermark across the image or require an account before unlocking high-resolution downloads. This tool has neither restriction: every barcode you generate is delivered at full resolution, with no branding overlaid on the image, and no login, email address or payment information requested at any point. That makes it suitable for both one-off personal projects and repeated commercial use, including on packaging that ships to customers.

Explore Our Other Free Tools

ToolPlex is a growing collection of fast, free, browser-based utilities for everyday tasks. There are several Text tool that are useful in our daily life, such as Base64 Encoder & Decoder, QR Code Generator, Barcode Generator, Password Generator, Word Counter, Case Converter, Text Repeater and Fancy Text Generator. Toolplex have quick converters to make the work easy, such as Unit Converter, Currency Converter, Time Zone Converter, Number to Word Converter, Word to Number Converter and Color Converter. Handling of Documents become simpler & easy with the help of tools like Image to PDF File Converter, PDF to Image Converter, PDF Compressor, Combine PDF Files tool, Split PDF tool, Rearrange PDF File tool, Remove PDF Page tool, Text Extractor tool, PDF to DOCX Converter, DOCX to PDF Converter , PDF Page Numbering tool, PDF Lock & Unlock tool and Signature Maker. To work on image Toolplex provide list of tool, such as JPEG Compressor, Merge PDF and Image tool, Image Resizer tool, Photo Date & Time Stamper, Passport Size Photo Maker, WEBP to Image Converter, Image to WEBP Converter and HEIC to Image Converter.