Compress PDF Online Free

Reduce your PDF file size instantly with adjustable quality — 100% private, no uploads required.

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Why Use QuickPDFify to Compress PDFs?

Most online PDF compression tools require you to upload your document to a remote server, exposing sensitive information. QuickPDFify is different — it uses pdf-lib to re-encode images and optimise file size entirely in your browser. Your files never leave your device, guaranteeing 100% privacy and security.

Reduce File Size

Compress PDFs by re-encoding embedded images at lower quality levels. Dramatically shrink file size while keeping the document fully functional.

Adjustable Quality

Choose from High, Medium, or Low presets, or use the fine-grained slider. Balance file size and visual quality exactly how you need it.

Preserves Text

Only images are re-encoded — text, vector graphics, and fonts remain untouched and fully selectable after compression.

Fast & Free

No sign-up, no limits, no cost. Processing happens instantly in your browser — no waiting for uploads or server queues.

Use Cases for PDF Compression

QuickPDFify is ideal for many everyday scenarios: shrink large PDFs before emailing them past attachment limits, free up storage space on your device, meet submission size caps for job applications or school portals, reduce bandwidth when sharing documents, or optimise scanned contracts for archival. Fast, private, and always free.

How It Works

  1. Upload — Select a PDF file from your device or drag and drop it into the upload area.
  2. Choose — Pick a compression level (High / Medium / Low) or adjust the quality slider to your preference.
  3. Name — Enter your desired output filename (defaults to "compressed").
  4. Compress — Click "Compress PDF" and let pdf-lib optimise your document in seconds. The result downloads automatically.

Frequently Asked Questions

Is my data safe?

Absolutely. Your PDF is processed entirely in your browser using pdf-lib. No files are uploaded to any server. This means complete privacy by design — your data never leaves your computer.

How much can I compress?

The reduction depends on the image content of your PDF. Files with many high-resolution images can shrink by 50–80 % at lower quality settings. Text-heavy PDFs compress less, but every bit helps.

Will my text be preserved?

Yes. Compression targets only the embedded images. Text, fonts, vector shapes, and all other content remain unchanged and fully selectable after compression.

How large can my PDF be?

You can upload PDF files up to 50 MB in size. There is no limit on the number of pages.

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