⬇️ PDF Compressor

Compression Quality: 80% (Less = Smaller File)

Processing... Please wait.

Select a PDF and adjust the quality slider to compress your document.

🚀 How the PDF Compressor Works

**Select File:** Choose your PDF document (`.pdf`) and adjust the **Compression Quality** slider (lower quality = smaller file size).
**Initiate Compression:** Click the blue **Compress PDF & Download** button.
Page Rendering: The tool utilizes PDF.js to render each page of your PDF onto an invisible HTML <canvas> element for processing.
**Image Compression:** The content of the canvas is extracted as a **JPEG Data URL** using `toDataURL('image/jpeg', quality)`. The quality value from the slider dictates how heavily the image data is compressed (lossy compression).
**Generate New PDF:** The compressed JPEG image data from each canvas is collected and used by **jsPDF** to create a new, much smaller, multi-page PDF document. **The entire process is client-side**, ensuring your document's privacy.

❓ Frequently Asked Questions

1. How does compression reduce the file size?

This tool primarily uses **lossy JPEG compression** on the visual content of the PDF. Lossy compression permanently discards some image data (like subtle color variations) to achieve a much smaller file size. The lower the quality setting, the more data is discarded.

2. Will this ruin my document quality?

Compression involves a trade-off. A quality setting of **70-85%** usually provides a good balance between small file size and acceptable visual quality. For documents with only text and sharp lines, compression below 50% might cause noticeable degradation (artifacts).

3. Will my PDF text still be searchable?

No. Since the tool converts each page into a static compressed image before placing it into a new PDF, the text is no longer searchable vector data. The output PDF is a collection of compressed image pages.

4. Why is my file size not reducing much?

If your original PDF mostly contains **searchable text and vector graphics** (like a document created in Word or Google Docs), image compression won't yield large savings. This tool is most effective on PDFs that are **scanned documents** or contain many high-resolution **images**.

5. Is the process client-side? Is it safe?

Yes, absolutely. The tool uses **client-side JavaScript** (PDF.js and jsPDF) to handle the entire operation—reading, compressing, and re-creating the PDF—all within your web browser. Your file is **never uploaded** to our servers, making it 100% private.