Private PDF compressor

The engine runs on this device. Images are compressed without rasterizing pages. Supported soft-mask images retain their transparency. Complex color spaces and unsupported mask types are kept unchanged.

Image optimization

Smart image optimizationProtects detected tables, screenshots and fine lines at their original resolution. Turn off to apply DPI and quality strictly to every supported image. Image resolution 150 DPI

Target DPI for photos and standard processing. Smart optimization keeps detected document images at source resolution. Never upscales.

Image quality 75% · Balanced

Controls JPEG quality and smart color precision. Smart optimization protects fine details; Lossless keeps color samples unchanged.

Downsampling

Image compression

Convert images to grayscaleChanges eligible color images to gray. Vector colors and protected image types remain unchanged.

PDF structure

Remove embedded thumbnailsRemoves optional page preview images. Does not remove page content. Remove bookmarks / outlinesRemoves navigation bookmarks only when enabled. Remove unused objectsThe PDF writer omits unreferenced objects automatically. Optimize object streamsCompresses PDF objects. Requires a modern PDF reader. Remove nonessential metadataRemoves document Info and XMP metadata; may affect PDF/A conformance. Remove embedded attachmentsNot supported. Attachments are preserved. Remove JavaScriptNot supported. Existing document scripts are preserved; downloads are not opened automatically. Subset compatible fontsReduces compatible embedded TrueType and Identity-CID fonts while retaining character shapes and widths. Editable form fonts and unsupported encodings stay unchanged. Linearize PDF (Fast Web View)Organizes the PDF for web viewing. May increase file size.

Document preservation

Text/content streams are checked byte-for-byte after decoding. Document structure is retained; no new accessibility or archival certification is claimed.

Preserve searchable textRetained by the resource-only optimization engine.Preserve text qualityRetained by the resource-only optimization engine.Preserve hyperlinksRetained by the resource-only optimization engine.Preserve form fieldsRetained by the resource-only optimization engine.Preserve annotationsRetained by the resource-only optimization engine.Preserve accessibility tagsRetained by the resource-only optimization engine.Preserve bookmarksSynced with Remove bookmarks / outlines. Preserve digital signaturesSigned originals stay unchanged by default. Explicit consent below is required to rewrite them.

Output settings

Output filename (optional)

For multiple files, this name is a prefix with a file number.

Append _compressedAdded before the .pdf extension.Output formatBest-effort target size

Output size depends on the document. No fixed target size is offered.

This tool optimizes supported embedded images and PDF structure. Already optimized PDFs may not shrink.

A smaller PDF starts here.

Your documents

Choose your compression level

Image optimization

PDF structure

Document preservation

Output settings

Making room for what matters.

Ready for your next step.