PDF Compressor (basic)
100% PrivatePDF & Document ToolsShrink a PDF by re-encoding its embedded images and cleaning its structure.
Runs entirely in your browser. Your input is not uploaded to Ovatly or anywhere else.
- 1Choose the PDF and note its current size, shown under the file box.
- 2Pick structural cleanup for a safe, lossless pass, or the image rebuild for big scans.
- 3For image mode, pick a resolution and quality, and read the warning before continuing.
- 4Press Compress PDF, compare the sizes, and download whichever copy you prefer.
A 10-page text document of 8.3 KB that was already stored efficiently went through structural cleanup and came out at 8.3 KB: no saving, and the tool says so plainly instead of inventing one. The same file rebuilt in image mode would change size mainly by trading text quality for smaller pictures, which is why that mode carries a warning.
- Structural cleanup cannot squeeze images or fonts further; files that are already well made often barely change, and the tool reports that honestly.
- Image mode changes the document: pages become flat pictures, text is no longer selectable or searchable, and links and bookmarks are lost.
- No percentage saving is promised, because results depend entirely on how the original file was made.
- Very large scans at 200 DPI can use heavy memory; drop the resolution if the browser struggles.
It happens when a file was already stored efficiently and re-encoding adds fresh overhead. The tool shows the true sizes; keep your original in that case.
About this tool
PDF Compressor (basic) shrinks a PDF in two honest ways: a lossless structural cleanup that re-packs how the file is stored, or an image rebuild that re-renders scanned pages as compressed pictures. The result panel always shows the exact before and after sizes, so you can judge the saving yourself instead of trusting a promised percentage.
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Part of Ovatly's free tools in PDF & Document Tools.