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Compress PDF to 300KB

Compress a PDF to 300 KB for an exam, job or scholarship portal. Text stays sharp and selectable, and the whole job runs on your device.

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    Your file is processed on your device and is never sent to any server.

    How to compress a PDF to 300 KB

    1. Add your PDF. Drop it into the box above or browse to it. It is opened in your browser, not uploaded.
    2. Keep 300 KB selected — or pick a nearby size, or type the exact limit your portal states.
    3. Compress and download. Images in the PDF are downsampled step by step until the file is under 300 KB, then you download the result.
    Exam documents: 50 KB to 300 KB. UPSC, NEET UG and JEE Main certificate and document PDFs must be between 50 KB and 300 KB — a band with a minimum, not only a ceiling. This tool stops below 300,000 bytes, so the file passes whether the portal counts a kilobyte as 1,000 or 1,024 bytes; if you want more margin, use the 250 KB tool. A file that is already under 300 KB but above 50 KB needs no compression at all. Protean's PAN guidelines use the same ceiling per page: supporting documents in black and white at 200 DPI, at most 300 KB per page (see our PAN page).

    What fits in 300 KB: measured

    300 KB keeps 2 text-heavy pages sharp and 7 pages readable. Certificates, which have more white space, fit better: 4 sharp, 11 readable. Phone photos of a page behave much like text scans: 2 sharp, 7 readable.

    DocumentPages kept sharp (about 100 DPI)Pages kept readable (about 70 DPI)One page reaches
    Text-heavy scan (A4, greyscale, 150 DPI)27full scan resolution (150 DPI)
    Certificate scan (A4, colour, 200 DPI)411about 154 DPI (the tool's highest setting)
    Phone photo of a page (12 MP)27about 154 DPI (the tool's highest setting)

    Moving up to 400 KB adds room for about 2 more readable text pages. Dropping to 250 KB costs about 1 readable text page.

    How we measured: this page's own compressor was run on three test documents of 1 to 30 pages, and the largest page count that stays under 300,000 bytes was recorded at each quality level. Your scans will differ with paper, ink and scanner, so treat these as a guide.

    If it will not reach 300 KB

    Other target sizes

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    Frequently asked questions

    How many pages fit in a 300 KB PDF?

    In our measurements, about 7 text-heavy scanned pages at readable quality (2 kept sharp), or 11 certificate pages. A single page reaches about 150 DPI.

    Can every PDF be compressed to 300 KB?

    Most scanned PDFs can. The tool shrinks the images inside the PDF, so it works best on scans and photos; a PDF that is mostly text or vector drawings has little to remove, and the tool tells you the smallest size it could reach.

    Will a scanned page still be readable at 300 KB?

    A single text-heavy A4 page keeps about 150 DPI at 300 KB in our measurements: sharp. Real text in a PDF (not a scan) is left untouched and stays sharp and selectable at any size.

    Is the result exactly the target size?

    It is the largest file the tool can produce that is still under the target, so you keep as much quality as the limit allows. It aims below 300,000 bytes, so it passes whether a portal counts a kilobyte as 1,000 or 1,024 bytes.

    Is my PDF uploaded anywhere?

    No. Compression runs in your browser on your own device. Nothing is sent to a server, which matters for ID cards, certificates and mark sheets.

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

    Their document PDFs must be between 50 KB and 300 KB. A file below 50 KB is rejected as well as one above 300 KB, so do not compress further than you need to.

    Updated