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§ · free tool
Barcode generator. Scannable in seconds.
Create Code 128 and EAN-13 barcodes with a live preview — tune bar width, height and colors, then export as PNG or SVG. Everything is encoded in your browser; nothing is uploaded or stored.
A free online tool by Digital HeroesEncoded in your browser — nothing is uploaded or stored.
Two real standards, encoded from scratch
Code 128 packs any ASCII text and auto-switches between code set B (text) and C (pairs of digits) for compact numeric runs, with the required modulo-103 check symbol. EAN-13 takes 12 digits, computes the modulo-10 check digit (or verifies it if you supply all 13), and lays out the left/right guard and centre patterns. The encoders are written in plain JavaScript right on this page — no library, no server.
§ 02 · what you can do
Everything a barcode tool should do.
- Generate Code 128 barcodes from any standard ASCII text or number string — the encoder auto-switches code sets B and C for compact digit runs.
- Generate EAN-13 retail barcodes from 12 digits (the check digit is computed for you) or validate a full 13-digit code.
- Watch the live preview redraw on every keystroke, with an inline hint showing the check digit or character count.
- Adjust bar width (1–6 px) and bar height (30–220 px) with sliders to fit your exact label dimensions.
- Customise bar and background colors for print or on-screen use, and toggle the human-readable text below the bars.
- Export as lossless PNG or scalable SVG, or copy the SVG markup straight to your clipboard for design tools.
§ 03 · how to use it
Four steps, no manual.
- Choose a symbology — Code 128 for any text or numbers, EAN-13 for retail product codes.
- Type your data into the input field. The preview updates instantly, and the hint below flags any invalid input or shows the computed check digit.
- Tune bar width, bar height, colors and the human-readable text toggle to suit your label.
- Click Download PNG or Download SVG to save, or Copy SVG markup to paste directly into your design tool.
§ 04 · faq
Frequently asked questions.
Is the Barcode Generator free?
Yes — completely free for everyone. No sign-up, no account and no usage limits.
Is it private? Is my data uploaded anywhere?
No upload, ever. The Code 128 and EAN-13 encoders are plain JavaScript running entirely in your browser — the data you encode never leaves your device, and nothing is stored.
What is the difference between Code 128 and EAN-13?
Code 128 encodes any standard ASCII text or numbers and is the workhorse for logistics, internal SKUs and shipping labels. EAN-13 is the fixed 13-digit retail product code (GTIN-13) you see on store shelves worldwide — digits only, with a mandatory check digit.
How is the EAN-13 check digit handled?
Enter 12 digits and the tool computes the modulo-10 check digit and appends it automatically. Enter all 13 digits and it verifies the last one — if it doesn't match, the hint tells you what the correct check digit should be.
Should I download PNG or SVG?
SVG for print and design work — it scales to any size with perfectly crisp bars. PNG for quick on-screen use or systems that only accept raster images; increase the bar width first if you need a higher-resolution PNG.
Will these barcodes actually scan?
Yes — both encoders implement the real specifications, including the modulo-103 check symbol for Code 128, the modulo-10 check digit for EAN-13, and proper quiet zones on both sides. For reliable scanning, keep dark bars on a light background and print at an adequate size.
Published · Last updated .
