Free Label Tools for Barcode, QR, Serial, and Thermal Printer Checks

Use these browser tools to create one-off barcode and QR images, verify printed codes, generate serial number CSV files, and test thermal printer alignment before you commit to a full production label batch.

Open Barcode Generator Scan a Code

New engine

Free Barcode Scanner & Creator NEW

Scan images or camera input, verify a printed label, then create cleaner 1D and 2D codes with the newer engine and broader barcode support.

Scan and Create Codes

Free Barcode Generator

Create Code 128, EAN-13, UPC, Code 39, and ITF-14 barcode PNG files for product, inventory, carton, and asset labels.

Create Barcodes

Free QR Code Generator

Generate static QR code PNG files for URLs, product pages, service records, internal IDs, or label prototypes without tracking redirects.

Create QR Codes

Sequential Number Generator

Generate padded serial number lists with prefixes and suffixes, then export CSV data for barcode labels, asset tags, or work orders.

Generate Serials

Thermal Printer Test Page

Create test pages for common label sizes so you can check scaling, darkness, alignment, gaps, and margins before production printing.

Test Printer Output

Use free tools for testing, then move to batch labels

The free tools are useful for one-off checks and prototypes. For production jobs, the important step is connecting the same values to a repeatable template. LabelFlow Pro can import Excel or CSV rows, bind values to text, barcode, QR, and serial elements, and print a full batch through the browser workflow.

Start with the Excel label printing guide if your values already live in a spreadsheet, or browse label templates if you need a ready-made layout.

Suggested workflow

Generate or paste a sample value with the barcode or QR tool.
Print one label and scan it back with the scanner.
Use the thermal printer test page if scale or alignment is wrong.
Move to a template when the value, size, and scan result are correct.