PDF Compression • ZIP compression • Batch compression • Password-protection

PDF compression

Achieve significant size reduction with the market’s best PDF compression algorithm! The system optimizes textual content and gently recompresses images. It even handles extremely large PDFs. Best of all, there is no online upload — your data stays on your device!

Click here or drag the PDF(s)

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ZIP file name

Compression profile

Files

Did you know:

Thousands of trade-secret cases are initiated worldwide each year, and most incidents never reach court.

Uploading documents to the “cloud” increases the risk of unauthorized access. Local processing protects your data.

Just one improperly shared PDF can cause competitive disadvantage. Local processing minimizes the attack surface.

“Free” online tools often log the files you upload. Working without uploads protects your business secrets.

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Our PDF compressor runs entirely in your browser, so there is no file upload. Text and vector graphics are preserved, images are gently recompressed. Multiple files can be processed simultaneously.

How to use it?

Select the PDF(s) or drag them onto the interface.
Compression profile: choose /Average (good quality + noticeable reduction) or /Strong (maximum size reduction).
ZIP password (optional): you can protect the output package with a password.
Compress and download: outputs are packed into a ZIP file; you can specify a file name.

Typical use cases

Reducing email attachment limits (e.g. 20–25 MB) for sending files.
Meeting portal or tender upload limits by shrinking PDFs.
Mobile sharing and saving storage space on the go.
Archiving – slimming down large PDFs for long-term storage.
Educational materials and presentations for fast sharing.

Frequently asked questions

What happens to the quality?: Text and vectors are preserved; images are recompressed with a trade-off depending on the chosen profile.
Does the OCR text layer remain?: Usually yes, if it was present in the source. If the source is purely image-based, it’s advisable to run OCR first.
Why is the output a ZIP?: Multiple files can be downloaded and organised at once. Even a single file is placed into a ZIP for convenience.
The size didn't decrease, it even increased. Is this an error?: Some documents cannot be reduced meaningfully; in such cases the original is placed in the ZIP with a tag.
Can password protected PDFs be compressed?: No. Password protected PDFs are not supported – remove the protection first, then reload the file.
How does the system handle very large (hundreds of pages) files?: If necessary, it splits, compresses and then re-merges the document.

Tip: for scanned PDFs, first run OCR, then compress; finally, check the visual quality.

Related tools: PDF merge, Watermark & Signature, PDF → images.