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How to Compress a PDF Without Losing Quality

Choose your compression level so you control the trade-off between file size and visual quality — all in your browser, with no upload.

How to Compress a PDF Without Losing Quality

Compress a PDF without losing quality — free, browser-based, no signup. Choose the right compression level for screen, email, or print. Works on any today.

How it works

  1. Open Compress PDF — Go to pdfwix.com/compress-pdf in any modern browser. No signup required.
  2. Upload your PDF — Drag the PDF onto the dropzone or click Select file. The file stays in your browser.
  3. Choose a compression level — Pick Low or Recommended to preserve quality; Recommended targets 150 DPI and is right for most uses.
  4. Compress — Click Compress — the PDF is processed locally using WebAssembly in 2–10 seconds.
  5. Review and download — Check the before/after file size on the download screen and save your compressed PDF.

Frequently asked questions

Can I compress a PDF without losing quality?

Yes for most PDFs. Text and vector content is not affected by compression at all. Image quality depends on the compression level chosen — PDFWix's Recommended level targets 150 DPI, which is sharp on screen and for standard office printing. Only High compression may show visible quality reduction on zoomed images.

How much can I reduce a PDF size without losing quality?

It depends on content type. A scanned document (all images) at Recommended compression typically reduces by 50–80% with no visible quality loss on screen. A text-only PDF reduces by only 5–15% because text is already stored efficiently.

Does compressing a PDF affect text quality?

No. Text and vector graphics are stored mathematically in PDFs — not as pixels. Compression only re-encodes embedded raster images (photos, scans). Text remains perfectly sharp regardless of compression level.