# Compress PDF

> Smart two-engine compression: lossless optimization for text PDFs, image re-encoding for scans - never returns a file bigger than your original. No upload, no limits.

Compress PDF files free with adjustable quality - reduce file size for email or upload without sending your document to a server. 100% in-browser compression.

- **Canonical:** https://www.ailovekit.com/pdf/compress-pdf/
- **Category:** PDF Tools
- **Processing:** Runs entirely in your browser. Files are never uploaded to AiLoveKit servers.

## Make Any PDF Smaller - Without Uploading It

Email limits, form portals, slow uploads: big PDFs cause endless friction. AiLoveKit's **PDF compressor** first analyzes your document: text-based PDFs get lossless structural optimization (selectable text stays crisp), while scanned or photo-heavy PDFs are re-encoded at the quality level you choose. The smallest result wins - and if your PDF is already optimal, you keep the original instead of a bloated copy. Everything runs on your device.

## Choosing the Right Quality

- **95%** - near-lossless, best for print-ready files.

- **70% (recommended)** - big savings, visually identical on screen.

- **20-40%** - maximum compression for drafts and previews.

Compressing a scanned document? The image engine re-encodes pages as pictures, so run [OCR](https://www.ailovekit.com/pdf/ocr-pdf/) first if you need searchable text afterwards.

## Frequently Asked Questions

**How much can I compress a PDF?**

Scanned or photo-heavy PDFs often shrink 50-80% with the quality slider. Text-only PDFs are usually already compact, so the tool applies lossless optimization instead and never hands back a file larger than the one you uploaded.

**Does compression reduce quality?**

Only image-heavy pages are re-encoded as optimized images at the quality you choose - at 70% or higher they look identical on screen. Text-only documents go through a lossless pass, so crisp vector text and copy-paste stay intact.

**Is it safe to compress confidential PDFs here?**

Yes - compression happens entirely in your browser. Your file is never uploaded, so confidential data cannot leak.

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Source: https://www.ailovekit.com/pdf/compress-pdf/
Part of AiLoveKit: https://www.ailovekit.com/
Machine-readable index: https://www.ailovekit.com/llms.txt