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Compress PDF

Make a PDF smaller without uploading it — the recompression runs entirely in your browser, so your scans and documents never leave your device. Pick a quality level, see the real before-and-after size, and never get a file back larger than it started. No account, no email.

Frequently asked questions

Does my file get uploaded?
No. The compression runs entirely in your browser, on your own device — the PDF never leaves your computer and never reaches a server, and it works with your connection switched off. That matters most here, because the files people compress are usually scans of sensitive originals.
How much smaller will it get?
It depends on the file. Most of a large PDF's size is its embedded images (scans, photos), so image-heavy PDFs shrink a lot; a text-only PDF is already small and has little to gain. You always see the real before-and-after size — and if there is no meaningful reduction, the tool hands back your original unchanged. It never gives you a file that is the same size or larger.
Will the quality drop?
You choose. Light keeps the most detail, Balanced is the recommended trade-off, and Strong makes the smallest file. The images are recompressed at the level you pick, and the real result size is shown so you can pick exactly the balance you need.
Does it keep selectable text?
If the PDF is a scan with no real text layer, there is no text to lose. If it has selectable text and the only way to shrink it is to flatten the pages to images, the tool tells you that before you download — so you can keep your original if you need the text searchable.
Compress PDF — shrink a PDF in your browser, never uploaded | Filum