Rotate Pages Utility

The rotatePages function allows you to rotate all pages or specific page indices by 90, 180, or 270 degrees.

API Signature

function rotatePages(
  file: File | Blob | ArrayBuffer | Uint8Array,
  degreesToRotate: 90 | 180 | 270,
  specificPages?: number[]
): Promise<Uint8Array>

Parameters

• file: The input PDF file or buffer.
• degreesToRotate: Angle of rotation. Must be 90, 180, or 270.
• specificPages: Optional array of 0-indexed page numbers to rotate. If not provided, all pages will be rotated.

Code Example

import { rotatePages } from "@manojcoder/pdf-utils";

async function rotateFirstPage(file: File) {
  try {
    // Rotates page 1 (index 0) by 90 degrees clockwise
    const rotatedBytes = await rotatePages(file, 90, [0]);
    const blob = new Blob([rotatedBytes], { type: "application/pdf" });
    // Process rotated document...
  } catch (error) {
    console.error("Rotation operation failed:", error);
  }
}