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WhatsApp Web: larger message text

Bumps the font size inside message bubbles and widens line height for comfortable reading.

Code to copy

/* Larger and more comfortable message text */
#main [data-testid="msg-container"] span.selectable-text,
#main div[role="row"] span[dir="ltr"],
#main div[role="row"] span[dir="auto"] {
  font-size: 16px !important;
  line-height: 1.5 !important;
}

How to use this example

1. Copy the code with the button above.
2. Install JustZix (2 minutes) and open the extension on the target page.
3. Add a new rule matching that page.
4. Paste the code into the rule's CSS panel and save — the effect appears instantly.