Compress PDF

Reduce PDF structural overhead when possible, without changing page content.

Choose a PDF or drag it herePDF · up to 25 MB

Lossless structural optimization only. Embedded images are not downsampled; already optimized or image-heavy PDFs may not shrink. Password-protected PDFs must be unlocked first.

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How it works

The browser rebuilds PDF object streams with pdf-lib. This lossless structural optimization does not downsample images, and many already optimized files will not shrink. Digital signatures may be invalidated by rewriting a PDF; keep your original.

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