Compress PDF to 100KB or Less

Getting all the way down to 100KB depends heavily on what's inside the PDF. Text-only documents are usually already well under 100KB and need no help at all. PDFs with one or two JPEG photos can often hit that target using the High compression level below, which aggressively downsamples images and lowers JPEG quality. But a PDF with many photos, or with scanned page images instead of real text, may not be able to reach 100KB without visible quality loss — at that point the honest answer is that some visual degradation is the tradeoff for that file size, not a limitation of this specific tool.

Your PDF is processed directly in your browser's memory using a client-side library — nothing is uploaded to any server.

How to use this PDF compressor

  1. Select a PDF file.
  2. Pick a compression level and click "Compress & Download".
  3. The reduced file downloads automatically, and you'll see exactly how much size was saved.

How does this actually reduce file size?

Document metadata (author, title, producer info) is stripped, and the file structure is re-optimized. Any embedded JPEG images are downsampled and recompressed at the level you choose — this is where most of the size reduction comes from on image-heavy PDFs, since photos are usually the largest part of a file by far.

How much smaller will my file get?

It depends entirely on the content. PDFs with embedded JPEG photos can shrink dramatically — commonly 50-80% — since those images get downsampled and recompressed. A text-only PDF with no images will only shrink a small amount (typically under 10%), from removing metadata and optimizing the file structure, since text content is already compact.

Does this work on all embedded images?

Only JPEG images are recompressed. PNG images and other raster formats embedded in the PDF are left untouched and don't contribute to the size reduction — this is a limitation of what can be reliably decoded and re-encoded client-side.