Compress PDF to 400KB
Compress PDF files online free. Reduce file size. Browser-based, private.
Drop a PDF here to compress — nothing leaves your browser.
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Compress PDF to 400KB
Compress a PDF to about 400KB for portals capped near half a megabyte. Keep detail, cut weight.
Why it matters: Smaller files are simpler to share, upload, and store — and working in the browser avoids server upload limits.
How to Compress PDF to 400KB
- Open the Compress PDF to 400KB tool and add your PDF (drag-and-drop or browse — it never leaves your device).
- Pick a level: Best quality (sharpest), Balanced (default), Smaller file, or Tiny (aggressive re-encode).
- Click Compress PDF. Pages are re-rendered as optimized images, so the lighter file downloads instantly.
- Download the result — everything runs in your browser, nothing is stored or sent.
Frequently Asked Questions
Add your PDF, pick a level, and download the tighter file. Compression happens entirely in your browser, so the PDF never leaves your device. You can choose the compression level depending on your size and quality needs.
Some forms cap around 500KB, so 400KB leaves safe headroom. Compression happens entirely in your browser, so the PDF never leaves your device. You can choose the compression level depending on your size and quality needs.
Yes at Balanced; lighter levels shrink photos more. Compression happens entirely in your browser, so the PDF never leaves your device. You can choose the compression level depending on your size and quality needs.
Yes, processed on your device. Compression happens entirely in your browser, so the PDF never leaves your device. You can choose the compression level depending on your size and quality needs. The compressed PDF is ready to download immediately.
Yes. There is no charge, no account, and no watermark on the output. Compression happens entirely in your browser, so the PDF never leaves your device. You can choose the compression level depending on your size and quality needs.
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