Compress PDF

Scanned or photo-heavy documents often drop 50–90%. A PDF that is mostly text is already small and efficiently stored, so expect only a modest saving there.

Yes. Compression targets the images inside the document; text and vector graphics are left alone, so selecting, copying and searching still work.

Medium is the safe default and is usually enough for email. Use Extreme only when the file must fit a strict limit — check the preview afterwards, because heavy downsampling can make small print hard to read.

The file was probably already optimised, or it contains almost no images. In that case splitting the document may be a better way to get under an attachment limit.

Yes, completely. There is no account to create, no trial that expires, no watermark on the output and no feature held back behind a paywall. The site is supported by unobtrusive advertising, not by charging you.

No. Compress PDF runs entirely inside your browser, so your files never leaves your device. You can confirm this by opening your browser's network tab — there is no upload request.

Yes. Because processing happens locally, there is no copy of your data on any server to leak, subpoena or lose. Nothing is logged and nothing is stored.

Yes. The interface is built mobile-first, with touch-friendly controls and layouts that adapt to small screens. Everything that works on a desktop works on a phone.

Once the page has loaded, yes. All processing is local, so you can carry on working if your connection drops.

Any current version of Chrome, Edge, Firefox, Safari or Opera, on desktop and mobile. If something behaves oddly, updating your browser resolves it in almost every case.

There is no server-side limit because nothing is uploaded. Files up to about 100 MB are comfortable on a typical device; beyond that, processing speed depends on your machine's memory.

Yes. Whatever you produce here is yours — use it in client work, products, packaging or publications. There is no watermark, no licence to accept and no attribution required.

No. There is nothing to keep: your data is never transmitted, and it is cleared from memory as soon as you close or reload the page.