Compress PDF to 350 KB

Our tool uses advanced browser-based processing libraries that run entirely in your browser — nothing is sent to any server. For 'By Quality' mode, it scans internal image streams in the PDF and re-encodes them at a lower quality. For 'By Size' mode, it renders each page to an image and recompresses them to hit the target file size.

'By Quality' keeps the text, fonts, and vector content in your PDF intact — it only compresses embedded images. This is ideal for most documents. 'By Size' flattens the entire PDF into images to hit a specific KB or MB target, which means text will no longer be selectable but achieves much more aggressive compression.

If you use 'By Quality' mode, yes — all text, fonts, and vector graphics are fully preserved. In 'By Size' mode, each page is rendered as an image, so text will appear but cannot be selected or copied.

Since all processing happens in your browser, the only practical limit is your device's available memory. Most devices handle PDFs up to 50–100 MB without issues.

Absolutely. Your file is processed entirely on your device using client-side WebAssembly. No data is ever sent to a server. When you close the browser tab, all processed data is cleared from memory.