Is the extension really offline?

Yes — and verifiably so. The extension declares only the contextMenus and storage permissions and no host permissions, so Chrome blocks it from reading any website data or making network requests. You can confirm this on the extension's details page under Permissions.

What do the two permissions do?

contextMenus adds the right-click "Generate barcode" entries; storage remembers your default format, error correction level, and PNG export size in your browser. Neither can access page content or send data anywhere.

Does it work on Microsoft Edge?

Yes — there is a native listing in the Edge Add-ons store, and the extension behaves identically there. Chrome users can also install from the Chrome Web Store; no "allow extensions from other stores" switch needed for either.

How large can the input be?

QR Codes hold up to about 2,900 bytes depending on the error correction level; the extension shows the highest version it can fit and reports a clear error when the text is too long. Linear symbologies have their own fixed length rules, which the error messages explain.

Can I use the barcodes commercially?

Yes. The symbols are generated on your machine and you own the output. EAN-13, UPC-A, EAN-8, and ITF-14 require a valid GS1 company prefix for real products — the extension computes correct check digits but does not assign numbers.

Is there a paid tier?

No. The extension is free, with no account, no usage limits, and no upsell — the same as the core generators on this site.

Barcodegen for Chrome — the Offline Barcode Extension

Generate barcodes and QR codes right inside your browser — no upload, no account, no network request. Right-click any selected text, link, or page URL, or press Alt+B to open the generator. Everything is computed on your machine.

Add Barcodegen to Chrome or Edge

Free, under 100 KB, and fully offline — the extension declares no host permissions, so the browser itself guarantees it cannot read any website or make network requests.

Install from Chrome Web Store Install from Edge Add-onsAlt+B opens the generator anywhere

Your Data Never Leaves the Browser

Most barcode extensions send the text you encode to a server and render the image remotely. Barcodegen ships real encoders with the extension, so the symbol is built on your machine — the same encoders that power the Barcodegen web tools.

100% Offline, Verifiably
The extension requests no host permissions at all — Chrome lists no "read and change your data on websites". With no network access, sending your text anywhere is not just a policy promise; it is technically impossible.
No Account, No Tracking
There is nothing to sign up for and nothing to configure. Your preferences — default format, error correction level, export size — are stored in your browser only, via Chrome's own storage.
Encoders You Can Verify
QR Code output matches the reference implementation bit-for-bit, and every linear symbology is checked against an independent decoder. The same quality bar applies whether you use the web tool or the extension.

How to Use the Extension

Three steps from any text to a downloadable barcode.

Install Once

Click the install button on this page, then pin Barcodegen to your toolbar. The whole extension is under 100 KB and needs no additional downloads.

Right-Click or Press Alt+B

Select any text on a page and right-click to generate from the selection, or right-click a link to encode its URL. Alt+B opens the full generator with a blank form.

Copy or Download

Copy the PNG straight to your clipboard for docs and slides, or download a PNG at up to 8× module width for print, or an SVG that scales without limits.

Seven Symbologies, Two Export Formats

The same format catalogue as the Barcodegen web tools — retail barcodes come with the human-readable digits and guard bars laid out to spec.

QR Code

Any text or URL up to about 2,900 characters, with error correction from L to H and automatic mask selection. Decoded independently to verify every symbol.

EAN-13, UPC-A, EAN-8

Retail barcodes with correct GS1 check digits, guard bars that extend below the data area, and grouped human-readable digits placed per the symbology spec.

Code 128

Full ASCII for SKUs, serial numbers, and shipping labels, with automatic code-set switching so the symbol stays as short as possible.

Code 39 and ITF-14

Industrial Code 39 for warehouse and asset labels; ITF-14 with the correct start and stop bars for outer shipping cartons.

PNG and SVG Export

PNG exports render from the same geometry as the SVG, so both always agree. Choose 2× to 8× module width for print-quality PNGs, or take the SVG for unlimited scaling.

Checksum Safety Net

Type a retail number with a wrong check digit and the extension recalculates it and tells you — the note appears above the preview, not silently.

Who Uses It

Anyone who needs a scannable barcode without pasting data into a website.

Retail and Inventory Teams

Look up a GTIN on any web page, right-click, and get a correctly structured EAN-13 or ITF-14 label to print.

Developers and QA

Encode test tickets, URLs, and serials while working — no context switch, and nothing from an internal system is ever uploaded.

Privacy-Conscious Users

Patient IDs, order numbers, internal links — text you would not paste into an unknown website belongs in a generator that cannot phone home.

Teachers and Presenters

Copy a QR code to the clipboard and paste it straight into a slide or handout — one gesture, no file management.

Frequently Asked Questions

Short answers about the Chrome extension.

Install Barcodegen for Chrome or Edge

Free, under 100 KB, and fully offline. Add it once, then right-click any text, link, or page to generate a barcode — or press Alt+B anywhere.