Quick Summary: A senior architect’s no-nonsense guide to finally solving the broken Hebrew and Arabic text rendering in @react-pdf/renderer that has plagued production environments since 2019.

Fixing the Unfixable: RTL Text in @react-pdf/renderer

I still remember the first time I deployed a localized invoicing service to prod-cluster-eu-west. It was 2020. We had just onboarded a major client from Tel Aviv. The staging environment—which used mocked English data—was green across the board. Then, five minutes after the canary release hit production, my Slack lit up.

Every single PDF invoice generated for our Hebrew-speaking users looked like they had been put through a blender. Characters were reversed, ligatures were broken, and the layout was a mess. I spent that weekend manually patching the rendering pipeline while drinking lukewarm coffee. If you’ve ever tried to force Right-to-Left (RTL) languages into a library that doesn’t want them, you know my pain. It’s not just a bug; it’s a battle against the rendering engine itself.

The “Why”: It’s Not Just CSS

Here is the hard truth I had to explain to my Junior Devs: PDF generation is not a web browser.

When you write HTML/CSS, the browser’s engine (Blink, WebKit, Gecko) handles the Bi-Directional (BiDi) algorithm for you. It knows that when it sees Arabic or Hebrew Unicode, it needs to swap direction and, crucially, handle ligatures (where character shapes change based on their neighbors).

@react-pdf/renderer sits on top of PDFKit. Historically, it has lacked a proper layout engine implementation for the BiDi algorithm. It simply dumps glyphs onto the canvas in the order they appear in the string. Since 2019, this has been the “wontfix” ticket that haunts the issue tracker.

Solution 1: The “Intern’s Fix” (String Reversal)

This is usually the first thing a developer tries. I see this in PRs all the time. You think, “The text is backwards? I’ll just reverse the string!”

Pro Tip: Do not use this for Arabic or Farsi. It breaks the cursive connection between letters (ligatures). It might pass for Hebrew in a pinch, but it’s fragile.

If you are generating simple labels in Hebrew and the library is fighting you, this hack works, but I hate it.

const reverseString = (str) => str.split('').reverse().join('');

// Usage in your PDF component
<Text>{reverseString("שלום")}</Text>

Verdict: Use only if your back is against the wall and the deadline is in 10 minutes. It feels dirty because it is.

Solution 2: The “Community Hero” Fix (The Library)

Recently, a developer tired of waiting for the core maintainers dropped a library specifically to patch this. This is the approach we are currently migrating to in our reporting-service-v2. It essentially intercepts the text and applies the correct BiDi logic and reshaping before React-PDF renders it.

We are talking about using a wrapper that handles the heavy lifting. You can find packages like @react-pdf-rtl (or similar variants popping up on npm based on the Reddit thread). Here is how you implement a robust wrapper manually if you want total control:

// You'll need a library like 'bidi-js' or generic implementation
import bidi from 'bidi-js'; 

const RTLText = ({ children, style }) => {
  // 1. Detect RTL characters
  // 2. Apply BiDi algorithm to reorder words/chars
  // 3. Render
  const processedText = bidiFactory().processText(children);
  
  return (
    <Text style={style}>
      {processedText}
    </Text>
  );
};

The beauty of the specific solution discussed in the community is that it handles the reshaping of Arabic glyphs, which is the hardest part.

Solution 3: The “Nuclear Option” (Puppeteer)

Sometimes, the library is just too limited. If you have a complex layout with mixed English, Hebrew, charts, and absolute positioning, @react-pdf/renderer might not cut it.

In our enterprise tier, for billing-service-01, we abandoned the library entirely. We spin up a headless Chrome instance using Puppeteer. Why? because Chrome never renders text incorrectly.

// The infrastructure-heavy approach
const browser = await puppeteer.launch();
const page = await browser.newPage();

// We render standard HTML/CSS which browsers handle perfectly
await page.setContent('<div dir="rtl">...complex RTL content...</div>');

const pdfBuffer = await page.pdf({ format: 'A4' });
await browser.close();

Warning: This is resource-intensive. Running a headless browser inside a Docker container requires more RAM and CPU than a simple Node.js library. Don’t put this on a t3.micro instance and expect it to survive Black Friday.

Final Thoughts

If you are building a simple report, grab the community library patch. It’s elegant and solves the root cause without blowing up your AWS bill. But if you need pixel-perfect rendering of mixed-direction complex layouts, don’t be afraid to drop the library and use a headless browser. Your users don’t care how you generated the PDF; they just want to be able to read their names.

Darian Vance

Lead Cloud Architect & DevOps Strategist

With over 12 years in system architecture and automation, Darian specializes in simplifying complex cloud infrastructures. An advocate for open-source solutions, he founded TechResolve to provide engineers with actionable, battle-tested troubleshooting guides and robust software alternatives.

🤖 Frequently Asked Questions