How do I run the "Base64 HTML" demo?

Install and launch Web Print Expert, then click Run print or Preview PDF on this page. The "Base64 HTML" demo runs the sample code with web-print-pdf over the local WebSocket service.

Do I need a local Vue or React project for this demo?

No. This page bundles web-print-pdf and editable sample code—you can run it directly in the browser.

Is the data in the "Base64 HTML" demo real?

No. All layouts, amounts, and names are fictional demo data for API illustration only.

Live demos

.demo-compat-banner--noscript { display: block !important; }

19 - Base64 HTML

printHtmlByBase64 for server-encoded HTML payloads.

Base64 HTML: printHtmlByBase64 for server-encoded HTML payloads. Run in the browser with Web Print Expert (fictional demo data).

Sample code

const base64 = btoa(unescape(encodeURIComponent('<h2>Base64 解码后打印</h2>')));
await webPrintPdf.printHtmlByBase64(base64, { paperFormat: 'A4' }, { paperFormat: 'A4' });

Back to all demos

Browse the sample list on the left and preview layouts plus sample code on the right. Run a demo to print silently or preview PDF via web-print-pdf and the local client. Install and launch the client first.

Client

If results look wrong, install the latest Web Print Expert client from our site first (older builds may cause layout drift).

Layout

Preview and print follow standard HTML/CSS only—no hidden tricks. What you style is what you get.

19 - Base64 HTML

printHtmlByBase64 for server-encoded HTML payloads.

Sample code

const base64 = btoa(unescape(encodeURIComponent('<h2>Base64 解码后打印</h2>')));
await webPrintPdf.printHtmlByBase64(base64, { paperFormat: 'A4' }, { paperFormat: 'A4' });

Result

Demos load bundled web-print-pdf first (same API as npm); CDN is used as fallback.
The client’s built-in Run examples page has more editable demos; this page complements it.
Utility demos (connection, printer list) return JSON only—no print job.

Download client free View npm package

19 - Base64 HTML

Layout preview

Sample code

Result