How to compress a PDF to 100 KB

Start with the submission rules

Check the maximum size, accepted format and required pages. docshift accepts PDFs up to 25 MB and 30 pages for compression, without password protection. Its 100 KB target means 102,400 bytes. A portal using decimal KB may require a lower target, such as 97 KB.

Compress and inspect

Choose the PDF, select target mode and enter 100 KB. The compressor tries lower JPEG quality before lowering page resolution. Download the result, zoom in on small text and inspect signatures, stamps and barcodes. If the tool reports that the target was missed, the offered file is the smallest result it found, not a successful 100 KB output.

Why a PDF gets large

High-resolution scans and photographs store many pixels per page. Compression reduces image detail to save bytes. A compact text-only PDF may instead grow when docshift rebuilds it as page images. Keep the original and compare both sizes.

If the result is unreadable or too large

If the receiving service permits separate documents, split the PDF into required ranges and compress each part. Remove pages only when they are not required. If all pages must remain in one document and readable compression cannot meet the limit, ask the recipient for another submission method.

What the output loses

Every page becomes a JPEG image in a new PDF. Selectable text, search, forms, links, bookmarks and accessibility tags are lost. This tool does not preserve those features or perform OCR. Use the original whenever those features matter.

Tools for this task

• Compress PDF
• Split PDF
• Delete PDF Pages