Compress PDF

When available, compression is handled by Ghostscript, which re-encodes embedded images at a lower resolution/quality and strips redundant data. The "Medium" level uses Ghostscript's /ebook preset (a balance of size and quality), and "High" uses the /screen preset (maximum compression, more visible image quality loss).

If Ghostscript is not available on the server, the tool falls back to re-rendering the PDF page-by-page, which still removes unused/duplicate objects and metadata bloat, though the size reduction is smaller than with Ghostscript's image re-encoding.

Compression works best on PDFs with large embedded images (scanned documents, photo-heavy reports); PDFs that are mostly text are usually already small and will shrink less.

Your files are uploaded over an encrypted (SSL) connection. We don't store, read, or share the contents of your files — they're processed to generate your result and are not retained on our servers afterward.

• Shrinking a scanned document below an email attachment limit (commonly 10-25MB depending on the mail provider).
• Reducing a portfolio or brochure's file size so it uploads within a job application portal's limit.
• Making a large PDF load faster when shared as a link on a slow connection.

• Compressing a PDF that's already small and text-only, expecting a dramatic size drop — most of the size in a typical PDF comes from embedded images, so a text-heavy document may barely shrink.
• Running compression repeatedly on the same file hoping for further gains — most of the achievable reduction happens on the first pass; further passes mostly degrade already-compressed images.
• Not checking image quality after compression on a document where visual fidelity matters (a photography portfolio, a printed proof) — always preview before sending it on.

• If the file is mostly scanned images, compression will typically save far more than on a mostly-text document — a scanned 50-page report often shrinks 60-80%.
• Keep your original uncompressed file until you've confirmed the compressed version still looks acceptable for your use case.

We respect your privacy. All files are processed securely and are never sold, shared, or used for anything beyond generating your result.