Tool 03 — Compress

Compress PDF

Reduce file size by removing redundant objects and optimizing the PDF structure.

⚠ Note: Compression works by re-rendering each page as a JPEG image. This reduces file size significantly but has two trade-offs: text becomes non-searchable (it's embedded as an image), and very fine text may lose sharpness on aggressive settings. Use High Quality if the PDF contains text you need to copy or search. Best for scanned documents, image-heavy PDFs, or archiving.
Step 1 — Upload PDF
🗜
Drop PDF here or click to browse
One file at a time
⚠ Very large PDFs (100MB+) may be slow — processing happens in your browser RAM
Step 2 — Quality Level
Screen
Smallest size
72 DPI equiv.
eBook ✓
Balanced
150 DPI equiv.
Printer
Good quality
300 DPI equiv.
Compressing... 0%
✓ Compressed
Original size—
Compressed size—
Reduction—
⏱ File expires in 45s
⚠ File expired. Please compress again.

How to Compress a PDF Online — Reduce File Size Privately

LovelyPDF compresses PDFs by re-rendering each page as a JPEG image at your chosen quality level, then rebuilding the PDF using pdf-lib. This significantly reduces file size for image-heavy and scanned documents. Choose High Quality to preserve sharpness, or Low for maximum compression. All processing happens in your browser — no upload, no waiting.

Step-by-Step Guide

  1. Upload your PDF by clicking or dragging it into the tool
  2. Select your compression quality — High, Medium, or Low
  3. Click Compress PDF and download your smaller file

When to Use PDF Compression

Email attachments often have a 10MB or 25MB limit. Document submission portals frequently cap uploads at 5MB. Scanned PDFs from photocopiers often exceed these limits. Compressing reduces file size by 60–90% for image-heavy documents, making them easy to share without visible quality loss.

Common Use Cases

Frequently Asked Questions

Will compression make my PDF text unsearchable?

Yes — pages are re-rendered as images, removing the text layer. Use High Quality if text sharpness matters, or use for scanned documents where text is already an image.

How much will my file size reduce?

Image-heavy and scanned PDFs typically reduce by 60–90%. Text-only PDFs may see less reduction.

Is there a file size limit?

No server-side limit. Very large files (100MB+) may be slow depending on your device.

Related tools: Merge PDF · PDF to Image · Grayscale PDF