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PDF Compressor

Downsamples embedded images, subsets fonts and drops unused objects to reduce file size.

🔒 Runs entirely in your browsercompressoptimizesize

Compression runs in a worker in this tab. Our own DEFLATE does the stream work; re-encoding a photograph uses your browser’s JPEG encoder, and nothing is uploaded either way.

Drop a PDF to shrink

Start with the safe options — they change no pixels at all.

Feed it from

Next

These accept what this tool produces, so the result can go straight in.