PdfKit

Reduce the size of a PDF

Bring a PDF down to a sensible size while keeping it readable. The balanced setting is chosen here, which is the one that usually looks unchanged.

1 · Choose your files

Drag & drop PDFs here, or click to browse

Up to 5 files, max 50 MB each

    2 · Pick the compression

    All processing runs on your own device using open-source PDF libraries; nothing is uploaded.

    3 · Collect your files

    Results appear here. Download them one by one or grab everything as a ZIP.

    Reduce the size of a PDF, step by step

    1. Drop your files into the box above, or click it to pick them.
    2. The settings for this are already chosen. Change them if you want something different.
    3. Click the button. Everything happens in your browser, so nothing is uploaded.
    4. Download the result, or take several files as a ZIP.

    Frequently asked questions

    What actually gets smaller?

    The images inside the file. Text and vector drawings are already tiny and are left alone, which is why a text-only PDF barely moves and a PDF of photographs can lose most of its size. If yours does not shrink, there was nothing heavy in it to begin with.

    Does anything about the file change?

    Only what you asked for. The text stays text and stays selectable, the pages keep their size, and nothing is flattened into an image. The one exception is compression, which is meant to change the file and says so.

    Is anything uploaded?

    No. The PDF engine runs inside your browser, so the files are read on your own device and never leave it. There is no account, no queue and no upload.

    Is it really free?

    Yes. No sign-up, no trial, no watermark and no cap on how many files you put through it. The site is paid for by ads.

    Other things you can do to a PDF

    Other files to convert

    More free tools: Merge · Split · Rotate · Compress · JPG to PDF · PDF to JPG · To text