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Compress PDF to any size in KB

Type the size your portal allows — 20 KB, 150 KB, 450 KB, anything — and get a PDF just under it. Free, unlimited, and your file never leaves your device.

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    Compress a PDF to the exact limit your portal states

    Application portals, scholarship sites and e-filing systems usually state a maximum file size in KB. Type that number above and the tool works backwards from it, downsampling the images inside your PDF until the file fits. Text and vector graphics are left as they are, so they stay sharp and selectable.

    Pick a size

    TargetScanned A4 pages that stay readable (measured)
    Compress PDF to 10 KBA small cropped item; not a full page scan
    Compress PDF to 20 KBA small cropped item; not a full page scan
    Compress PDF to 50 KB1 text-heavy, 1 certificate
    Compress PDF to 80 KB1 text-heavy, 3 certificate
    Compress PDF to 90 KB2 text-heavy, 3 certificate
    Compress PDF to 100 KB2 text-heavy, 3 certificate
    Compress PDF to 150 KB3 text-heavy, 5 certificate
    Compress PDF to 200 KB4 text-heavy, 7 certificate
    Compress PDF to 250 KB6 text-heavy, 9 certificate
    Compress PDF to 300 KB7 text-heavy, 11 certificate
    Compress PDF to 400 KB9 text-heavy, 15 certificate
    Compress PDF to 450 KB10 text-heavy, 17 certificate
    Compress PDF to 500 KB12 text-heavy, 19 certificate
    Compress PDF to 600 KB14 text-heavy, 23 certificate
    Compress PDF to 800 KB19 text-heavy, 31 certificate
    Compress PDF to 1 MB24 text-heavy, 39 certificate
    A band, not only a ceiling. UPSC, NEET UG and JEE Main document PDFs must be between 50 KB and 300 KB. Compressing a certificate to 20 KB would get it rejected there for being too small. Always check both ends of the limit.

    Getting a PDF from MB down to KB

    A PDF made from phone photos is often 2–10 MB because each page is a full-resolution camera image. Those images compress very well: downsampling them to a sensible resolution is what brings the file into the KB range. A PDF that is large because it contains many pages of text will not shrink much this way; remove the pages you do not need with Split PDF instead.

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    Frequently asked questions

    How do I compress a PDF from MB to KB?

    Add the PDF, type the size in KB that your portal allows, and press Compress. Images inside the PDF are downsampled until the file is under that size. Phone scans that are several megabytes usually come down to a few hundred KB without becoming unreadable.

    Which size should I choose?

    The limit the portal states, or a little under it. Compressing far below the limit only throws away quality, and some portals also set a minimum size.

    Why does the tool aim a little below my number?

    Some portals count a kilobyte as 1,000 bytes and others as 1,024. The tool stays below your number times 1,000 bytes, so the file passes on either kind of portal.

    What size do UPSC, NEET and JEE Main documents need?

    Their certificate and document PDFs must be between 50 KB and 300 KB, so a file can be rejected for being too small as well as too large.

    Is my PDF uploaded?

    No. Everything happens in your browser on your own device.

    Updated