import type { CompressOptions } from './types.js';
type PdfInput = Buffer | string;
/**
 * Compresses a PDF document. Automatically repairs damaged PDFs.
 *
 * By default (lossless), deduplicates images, re-encodes very high quality
 * JPEGs (q91+) at q85, downscales images to 150 DPI, optimizes embedded
 * JPEG Huffman tables, recompresses all streams with Flate level 9,
 * generates object streams, and removes unreferenced objects.
 *
 * With `lossy: true`, uses more aggressive image re-encoding (skips JPEGs
 * at q65 or below, re-encodes the rest at q75) and downscales to 72 DPI.
 * Text, vectors, and fonts are preserved.
 */
export declare function compress(input: PdfInput, options: CompressOptions & {
    output: string;
}): Promise<void>;
export declare function compress(input: PdfInput, options?: CompressOptions): Promise<Buffer>;
export { concurrency } from './concurrency.js';
export type { CompressOptions } from './types.js';
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