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Compress PDF — Free, In-Browser File Size Reducer

Free PDF compressor. Reduce file size while keeping quality usable. Runs entirely in your browser — nothing uploads.

Compress PDF

Best for image-heavy PDFs and scans. Pick a quality / DPI trade-off.

Files never leave your browser

⚠ Output is image-based

This tool rasterizes each page to a JPEG, then rebuilds the PDF. Big wins on scans & image-heavy PDFs. Text becomes part of the image — won't be selectable or searchable. For text-heavy PDFs, keep the original.

Drop a PDF here, or click to choose

Up to 100 MB · compressed in your browser

About this tool

Smaller PDFs, no upload

Big PDFs are usually big because of high-resolution images. This tool re-encodes them and strips redundant data to cut the file size, all locally in your browser.

How to use the Compress PDF

Takes about a minute. No signup, no download, your data stays in your browser.

  1. 1
    Open the tool. Scroll up to the Compress PDF above — it loads instantly in your browser, no install needed.
  2. 2
    Enter your values. The fields come pre-filled with realistic defaults so you can see how it works — replace them with your own numbers.
  3. 3
    Read the result. The output updates instantly. Copy or share it — nothing is uploaded to a server, everything stays on your device.

Frequently asked questions

Common questions about the Compress PDF.

Is the Compress PDF free to use?

Yes. The Compress PDFon 7BusyBoss is completely free — no signup, no paywall, no usage cap.

Do I need to sign up to use the Compress PDF?

No. The Compress PDFworks instantly in your browser — no account needed. Signing in with Google is optional and only unlocks features like saving favorites and higher AI build limits.

Does the Compress PDF work on mobile?

Yes. Every tool on 7BusyBoss is mobile-responsive and works in any modern browser — Chrome, Safari, Firefox, Edge — on phones, tablets and desktops.

Is my data safe when I use the Compress PDF?

Yes. The Compress PDFruns entirely in your browser — your inputs never leave your device unless the tool explicitly fetches public data (e.g. currency rates). We don't store the values you type.

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