Compress PDF — Reduce PDF File Size Online

Free online PDF compressor. Reduce PDF file size while keeping quality. Fast, secure, no upload limits—processes run in your browser.
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Files processed locally in your browser, never uploaded to our server.

Why client-side?

Your PDF never leaves your device. Compression runs entirely in your browser, so sensitive documents stay private.

Pages are re-encoded as JPEG images. Text is no longer selectable after compression, and image-heavy or scanned PDFs usually shrink the most.

Compression Result

No file selected yet. Upload a PDF to see how much you can save.

Tool Introduction

This free online PDF compressor reduces PDF file size directly in the browser by rendering each page and rebuilding the document with JPEG images. Choose a compression level—low keeps more detail, high squeezes harder—then download the result.

Because processing happens locally, your documents never touch a server. Scanned PDFs and PDFs with photos usually compress best; already optimized or mostly text-based PDFs may not become smaller.