Compress your PDF file down to approximately 500KB. Suitable for reports, presentations and documents shared over email or cloud storage.
Click the upload area or drag and drop your PDF file. The tool works entirely in your browser — your file is never sent to any server.
Select Low, Medium or High compression. Higher compression reduces file size more but may reduce image quality inside the PDF. A target size is shown before you download.
Click Compress and Download. Your compressed PDF is generated in seconds and downloaded directly to your device. No watermarks, no sign-up.
The tool uses pdf-lib to work directly on the PDF structure — stripping metadata, compressing object streams, and re-encoding embedded JPEG images at a lower quality. It never rasterizes pages, so text remains as crisp vector text rather than a blurry image.
Yes, completely. All compression happens entirely inside your browser using JavaScript. Your PDF is never uploaded, transmitted or stored anywhere. Once you close the tab, nothing remains on any server.
There is no hard limit imposed by the tool, but very large PDFs (above 100MB) may be slow to process depending on your device memory and CPU. For best results, files under 50MB process fastest.
Low compression is best for documents where text clarity and image quality are critical, such as legal or medical records. Medium is ideal for general documents and presentations. High compression suits scanned documents or situations where file size is the priority.
No — unlike rasterization-based tools, this compressor preserves text as vector data. Only embedded images are re-compressed. Text will remain perfectly sharp regardless of the compression level chosen.
No. Password-protected or encrypted PDFs cannot be processed by browser-based tools. You will need to remove the password protection first using a PDF Unlock tool, then compress the file.
PDFs that contain many high-resolution images or scanned pages compress the most — sometimes by 60-90%. PDFs that are mostly text with no images compress less, because the text is already stored very efficiently as vector data.
Yes. The tool works in any modern mobile browser including Chrome, Safari and Firefox on Android and iOS. Larger files may take longer on mobile due to device memory limitations.
This happens when the original PDF is already heavily optimised, or when it contains only vector graphics and text with no embedded images. In these cases, the tool will notify you and return your original file unchanged rather than making it worse.
Unlike tools that rasterize (convert pages to images), this tool preserves the native PDF structure. Text stays as text, links stay as links, and the result is a true PDF — not a scanned image dressed up as a PDF. The trade-off is that very image-heavy PDFs may compress less than a rasterizing tool would achieve.
