Is this tool really free?

Yes, all our PDF tools are completely free to use with no hidden costs, subscriptions, or per-file charges. We support the service through non-intrusive advertising, not by charging for basic document operations. You can use any tool as many times as you like, with no daily limits, file size restrictions, or account requirements whatsoever.

Absolutely. All PDF processing happens directly in your browser using local JavaScript and WebAssembly libraries. Your files are never uploaded to any server, never stored in the cloud, and never transmitted over the internet. The files remain entirely on your device from start to finish, giving you complete control over your sensitive and confidential documents.

How much can I reduce the file size?

Compression results vary significantly depending on your PDF's content. Documents that are mostly text see modest reductions of 10-30%, while PDFs containing high-resolution color images can often be reduced by 50-80% with minimal visible quality loss. The compression level you choose controls the trade-off between file size and visual fidelity.

Will compression reduce quality?

It depends on the compression level you choose. Low compression preserves the most visual quality while achieving modest size reductions. High compression achieves smaller files but may introduce visible artifacts in images, particularly photographs. Text and vector graphics are not visually affected by compression — only raster images show quality changes.

What does the compression tool actually do?

The compression tool primarily works by re-encoding embedded raster images at a lower quality setting. It may also remove duplicate objects, optimize the PDF structure, and strip unnecessary metadata. Text layers, vector graphics, and document structure remain intact — only the image data is affected by the quality reduction.

Can I compress a PDF that is already compressed?

Yes, but the additional reduction will be smaller than on an uncompressed file. If a PDF has already been heavily compressed, running it through compression again at the same settings may increase the file size slightly due to re-encoding overhead. For best results, try the medium compression level first and check the output quality before choosing higher compression.

What is the maximum file size I can compress?

There is no enforced file size limit, but very large PDFs (over 200MB) may be slow to process or may exhaust your browser's available memory. If you encounter issues with a very large file, try splitting it into smaller sections first, compressing each section, and then merging the compressed sections back together.

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OCR PDFNew
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