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Compress PDF

Smaller file for email and upload forms

Up to 200 MB at a time. On a phone, large documents take longer and need more memory.

Re-saving packs the PDF structure more tightly. The result isn't always smaller, and images are left alone in this mode.

Keep the original. Editing a PDF can invalidate a digital signature, and special features, forms and bookmarks may not carry over to the new file.

Your file stays on your device. No sign-up, no limits.

There are two ways to compress a PDF here. Re-saving tidies the file structure and leaves images alone, so text documents usually shrink only a little. Turning pages into JPEG helps most with scans, but the text is no longer searchable afterwards. When it's done you see both sizes, even if the new file turns out no smaller.

How it works

Start with re-saving, because you lose nothing. If that isn't enough, try JPEG mode. Lower quality and resolution mean a smaller file, but small print gets blurry sooner. Press “Compress and compare sizes” to see the result.

JPEG mode drops forms, links and digital signatures. Don't delete the original until you've checked the new copy.

Worked example

A visa application portal accepts attachments up to 2 MB, and your scanned birth certificate is 7.8 MB. Choose JPEG, medium quality (75%) and 144 dpi, then compare the sizes. Still over 2 MB? Drop to 96 dpi and check that the stamp is still readable.

Questions people ask

How do I get a PDF under 1 MB?

Choose JPEG at 55% quality and 96 dpi. If that still isn't enough, cut the document into parts with Split a PDF by file size.

Why isn't my compressed PDF any smaller?

The file was probably well compressed already. Re-saving rewrites the objects but leaves embedded images as they are. The tool shows the real sizes and doesn't pretend to have saved space.

Will the text still be searchable?

After re-saving, yes. In JPEG mode each page becomes a picture, so you can't search or copy the text without OCR.

Which quality setting should I pick?

Try 75% and 144 dpi first. If small text is hard to read, raise the quality or the resolution. The percentage is a JPEG encoder setting, not a promised saving.

Is compressing a PDF safe for confidential files?

The file never leaves your device: it's processed in the browser and nothing is uploaded.

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Updated: 13 November 2026