PDF Compressor

How to use the PDF Compressor

1. Click the upload area or drag and drop your PDF file.
2. The tool automatically processes your PDF and removes unnecessary data.
3. Review the file size comparison between the original and compressed versions.
4. Download the compressed PDF if the file size was reduced.

Why results vary so much by document

A PDF exported from Word with no embedded images compresses very little, since there's not much redundant data to strip in the first place. The file is already close to its minimum size. A PDF made of scanned pages saved at unnecessarily high DPI, on the other hand, can often shrink dramatically, sometimes to a small fraction of the original size, because scanner software frequently defaults to a resolution far higher than needed for either screen viewing or standard printing. If compression barely changes your file's size, that's usually a sign the original was already lean, not a sign the tool failed.

Frequently asked questions

Will compression noticeably reduce quality?

For scanned documents, a moderate compression setting is usually visually indistinguishable on screen while cutting file size significantly; pushing compression very aggressively can start to visibly degrade image clarity, especially on text-heavy scans.

Why did my file barely shrink at all?

The original was likely already efficient. Text-based PDFs with no large embedded images have little redundant data to remove, so a small reduction (or none) is expected and not an error.

Does compressing remove any content, or just re-encode it?

Just re-encoding. Images are recompressed and unnecessary embedded data is stripped, but no visible content (pages, text, images) is removed.