⌘ K
barcode · code128 · ean13 · local

Generate barcodes as PNG instantly

Encode any text as Code 128 (ASCII) or any 12/13-digit value as EAN-13. Download as a clean PNG. Runs entirely in your browser.

Barcode Generator
Type
CODE128
ASCII
Bars
134
modules
Module
2px
width
Status
ready
encoded
Type:
input · image
Value
Module width (px)
Bar height (px)
output · preview

Code 128 · subset B

Quick Start

How it works

Pick an image, tune the options, then download the result. Everything runs in your browser.

  1. 01

    Pick a type

    Code 128 for any ASCII string; EAN-13 for retail product codes.

    Files stay in memory as an HTMLImageElement — the original bytes are never uploaded, and EXIF metadata is preserved until you explicitly transform it.

    typeuploadcanvaslocaldecode
    type · bytesCODE128 · loaded
    Code 128 | EAN-13
    loaded · decodedcanvas · ready
  2. 02

    Type a value

    Any ASCII works for Code 128. EAN-13 needs 12 or 13 digits.

    Encoder quality is exposed where the format supports it — JPEG and WebP get a 0–1 quality slider; PNG is lossless. Options re-render the canvas immediately.

    valueoptionslive previewencoderquality
    value · tunableHELLO-128 · live
    encode("HELLO-128")
    options applied · liveencoder · live
  3. 03

    Tune size

    Module width controls per-bar pixel width; bar height controls scan tolerance.

    Pixel work runs on the Canvas 2D context — drawImage resamples with the browser’s bilinear filter and getImageData/putImageData back per-pixel passes.

    sizerenderCanvas 2Dpreviewpx-perfect
    modules · resampled134 · px-perfect
    fillRect(x, y, m, h)
    preview · livepx-perfect
  4. 04

    Download PNG

    Save the barcode and embed it anywhere PNG works.

    Downloads ship via a hidden anchor with an object URL — no server round-trip, and the file on disk is untouched. The output filename inherits a sensible suffix.

    exportdownloadblobclient-sideobject URL
    ok · blobready · saved
    barcode-code128.png
    shipped · ready to shipsuccess
Pro tips

Browser-only image work that scales

Convert with quality control

JPEG/WebP let you pick a 0–1 quality. Default 0.92 is a good compromise of size and visible quality.

PNG isn’t free

Use PNG only for transparency or sharp edges. For photos, WebP is smaller at the same perceived quality.

Strip EXIF for privacy

Photo EXIF often contains GPS, camera model, and timestamps. Strip before sharing public uploads.

Watch the colour profile

Convert to sRGB before web export. Wide-gamut images render oversaturated in non-managed browsers.

AVIF when it’s available

AVIF beats WebP on size at the same quality. Detect support via <picture> with fallbacks.

Lazy-load below the fold

Add loading="lazy" on <img>. The browser handles scheduling — no IntersectionObserver needed.

Related toolsQR Code GeneratorUUID GeneratorImage CompressorImage ResizerPNG to JPGFavicon Generator
Use Cases

When to use this tool

Common workflows it speeds up.

Inventory labels

Print Code 128 stickers for warehouse boxes. Decoded into a Canvas 2D context — original bytes never leave the tab, so you can process customer-uploaded photos, internal screenshots, or sensitive diagrams without privacy concerns.

px-perfect

Retail price tags

Generate EAN-13 for catalogue listings. Encoders expose quality 0–1 where the format supports it (JPEG, WebP); PNG and AVIF stay perceptually lossless. Pick 0.85 for web, 0.95 for archival, 0.7 for thumbnails.

quality-tunable

Event tickets

Encode reservation IDs on printed tickets. Pair with the EXIF Stripper before sharing user-uploaded photos publicly. Camera serial numbers, GPS coordinates, and timestamps often hide in image metadata and leak more than the picture itself.

format-aware

Asset tracking

Tie hardware to a scannable string. Output preserves colour profile (sRGB) so it renders consistently across browsers, monitors, and print pipelines. Wide-gamut workflows can opt into Display P3 for modern Apple devices.

EXIF-safe

Quick demos

Mock barcodes for product photo shoots. Re-runs only on option changes, never on window resize, so the canvas stays responsive on large images. drawImage uses the browser's bilinear filter for fast resampling.

client-side

Cross-tool scan

Both formats work with most POS apps. Downloads as .png, .jpg, .webp, or .avif with the correct MIME so editors apply native handling on save. The filename inherits a sensible suffix derived from the input.

compression-ready
FAQ

Frequently asked questions

Subset B — printable ASCII from space (32) through DEL (127).
The tool refuses to render and tells you the expected check digit. Supply 12 digits to auto-compute it.
Bump module width and bar height up. The PNG scales with those settings.
No. The barcode renders locally in your browser — your data never leaves the device.
No — use the dedicated QR Code Generator for QR.
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