ALLYX ONE
100% browser-based · zero uploads

PDF Compressor

Reduce your PDF file size in seconds — free, no account required, and nothing leaves your device. Pick a compression level and download a smaller file instantly.

Drop your PDF here, or click to browse

PDF files up to 100 MB

How It Works

1

Pick your PDF

Drop your PDF onto the page or click to choose it from your device. Up to 100 MB supported.

2

Choose a level

High Quality keeps it sharp. Balanced is a good all-rounder. Maximum Compression gets the smallest file.

3

We compress it here

Your PDF is processed entirely on your device — not sent anywhere. A progress bar shows each page as it's done.

4

Download your result

See exactly how much space you saved, then download the smaller file straight to your device.

How to Compress a PDF Online

  1. Drag and drop a PDF file onto the upload area, or click to choose one from your device.
  2. Select a compression level — High Quality, Balanced, or Maximum Compression.
  3. Click Compress PDF and watch the progress bar as each page is processed.
  4. When complete, you'll see the original size, compressed size, and how much space you saved.
  5. Click Download Compressed PDF to save the file.

Compression Levels Explained

Level Best For Expected Reduction
High Quality Presentations, reports for sharing 20–40%
Balanced Email attachments, web uploads 40–65%
Maximum Compression Archiving, strict file-size limits 60–80%

Actual results depend on your PDF's content. Image-heavy PDFs compress the most. Text-only documents may see smaller reductions since text data is already compact.

Features

  • Your files stay private: Compression happens entirely in your browser — nothing is uploaded or stored.
  • No account required: Open the page and start compressing straight away.
  • Three compression levels: Choose the right balance of quality and file size for your needs.
  • Real-time progress: Page-by-page progress bar so you always know what's happening.
  • Size comparison: See exactly how much smaller your file is before downloading.
  • Up to 100 MB: Handles large multi-page documents.

Frequently Asked Questions

Is my PDF uploaded to your servers?

No. Your file never leaves your device. Compression happens entirely in your browser — nothing is sent to or stored on our servers.

Is this free to use?

Yes, completely free. No account required, no watermarks, and no hidden charges.

Will text still be selectable after compression?

The compression works by re-rendering each page as a high-quality image. As a result, text will not be selectable or searchable in the output file. For documents where selectability matters, use the High Quality setting to minimise quality loss.

How much will my file be compressed?

It depends on the content. PDFs with many embedded images typically compress by 40–70%. Text-only PDFs may see smaller gains because text data is already very compact.

What is the maximum file size?

Up to 100 MB. Very large PDFs may take longer depending on your device's performance.

Which browsers are supported?

This tool works in all modern browsers — Chrome, Firefox, Edge, and Safari. No plugins or extra software needed.