Compress PDF to 1MB

Shrink a PDF down to under 1 MB — a good default for email and most upload limits.

Select a PDF to compress

Click to choose, or drop a file here

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Compress PDF to 1MB — frequently asked questions

Is 1 MB a safe default?+

For most multi-page documents, yes — it's usually enough room that the quality loss is barely noticeable, unlike the more aggressive 100 KB or 200 KB targets.

What if my file is already under 1 MB?+

It's returned as-is (or lightly re-compressed) — there's nothing to shrink.

你們會把我的檔案上傳到伺服器嗎？+

不會——這裡的每個工具都完全在你的裝置上處理檔案，不會向伺服器上傳任何內容。唯一的例外是 AI 工具，它們會把擷取的文字（而非檔案本身）傳送給 Claude 來完成工作。

有檔案大小限制嗎？+

我們沒有人為設下限制，但由於處理過程在你的瀏覽器中進行，非常大的檔案（超過 500MB 或 1000 頁）會受你裝置記憶體的限制，而非我們的限制。