PDF Compressor

About PDF Compressor

Compress PDF files locally with structural optimization, optional metadata cleanup, explicit page flattening, DPI, quality, grayscale, and honest size comparison.

A PDF Compressor reduces or attempts to reduce the file size of an existing PDF. Some PDFs shrink through structural optimization, metadata cleanup, image recompression, downsampling, grayscale conversion, or page flattening. Browser-based compression has limits because not every PDF exposes embedded images in a way that can be safely recompressed while preserving text, links, forms, and accessibility structure. This PDF Compressor is transparent about those limits: light optimization preserves document structure where possible, while stronger modes flatten pages into images only after the user chooses that trade-off.

How to use PDF Compressor

Upload one PDF or generate the local sample PDF. Review the analysis for file size, page count, PDF version when available, metadata presence, broad content profile, approximate image references, and compression opportunity. Choose Light Optimization for a quality-preserving structural rewrite, Balanced Compression for image-heavy PDFs where page flattening is acceptable, Strong Compression for smaller email or upload copies, or Custom for implemented DPI, image quality, grayscale, metadata, and strategy settings. Compress the PDF, compare original size with new size, review whether the output became larger, inspect the preview, and download only when the result is acceptable.

PDF Compressor example

A marketing report with large screenshots can be compressed with balanced settings before sending to a client. A proposal PDF can be tried with light optimization first so selectable text and links are more likely to remain intact. Scanned receipts can use stronger grayscale flattening for a smaller archive copy. Presentation PDFs, business documents, student assignments, email attachments, and upload-portal documents can be tested with different modes, but the final output should always be reviewed for readability and size before sharing.

Related tools

Browse more Image & PDF Tools tools or open the related options below.

• PDF Merger Merge multiple PDF files locally with ordering, selected-file merging, file-level rotation, metadata, validation, and browser-side download.
• PDF Organizer Organize PDF pages locally with visual thumbnails, reordering, rotation, deletion, duplication, undo, redo, and browser-side export.
• PDF to Images Convert selected PDF pages locally into PNG, JPG, or supported WEBP images with DPI controls, thumbnails, individual downloads, and ZIP export.
• Image Compressor Compress JPG, PNG, WEBP, GIF first-frame, BMP, and supported AVIF images locally with presets, preview, target size, batch results, and ZIP export.
• Image Resizer Resize JPG, PNG, WEBP, GIF first-frame, BMP, and supported AVIF images locally with exact dimensions, percentages, presets, aspect ratio, crop-fit preview, and ZIP export.
• Image Format Converter Convert JPG, PNG, WEBP, GIF first-frame, BMP, and supported AVIF images locally with transparency handling, compatibility notes, preview, and ZIP export.

Helpful questions