PDF Compressor

When to use this

Gmail bounced your attachment. The upload portal says "file too large." Your Dropbox link won't generate a preview because the PDF is over 50MB. These are the moments you need a compressor.

Most of the time, the problem isn't the content — it's the overhead. PDFs accumulate metadata, revision histories, XML streams, and bloated cross-reference tables that add megabytes without adding value. Stripping that dead weight can shave 10-40% off the file size without changing a single visible element.

This is a metadata-and-structure compressor, not an image resampler. If your PDF is large because it's full of high-res photos, the reduction will be modest. But for text-heavy documents with verbose metadata (common with Word-exported PDFs, Adobe InDesign output, and legal document generators), the savings are significant.

Good to know

Most "bloat" is invisible. Author names, software version strings, creation timestamps, editing histories, XMP metadata blocks — none of this shows up when you read the PDF, but it can account for 10-30% of the file size. Especially in PDFs generated by enterprise software.

Your actual content is never touched. Text, images, fonts, form fields, annotations, bookmarks — all preserved exactly. The compressor only strips metadata and optimizes the internal object table. The PDF opens identically in every reader.

Image-heavy PDFs won't shrink much. A 50MB PDF of scanned pages is 50MB because of the images, not the metadata. This tool will trim a few percent, but for dramatic size reduction on image-heavy files, you'd need image resampling (a different technique entirely).

Word-exported PDFs respond especially well. Microsoft Word embeds verbose metadata, font subsets, and structural overhead that this compressor strips efficiently. A 10MB Word-exported PDF routinely drops to 6-7MB.

Quick Reference