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Compress a PDF to under 100 KB

The website rejects your file because it is over 100 KB? PDFmoji finds the sharpest version that fits under the limit, right on your device.

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or drop your file here · free, no sign-up

  • Free and ad-free
  • Your files stay on your device
  • Works on phone and computer

Try it in airplane mode: your files never leave your device, 0 bytes uploaded.

Compress PDF to 200 KB · Compress PDF to 1 MB

Compress PDF to 100 KB in 3 steps

  1. Open the PDF

    It stays on your device.

  2. The limit is already set to 100 KB

    Or type another one: 50 KB, 300 KB, 2 MB…

  3. Download the file under 100 KB

    PDFmoji keeps the best quality possible under the limit.

Why PDFmoji

Actually free

Merge, compress, convert, sign: free and unlimited, no account, no ads.

Your files never leave

Everything runs in your browser: your PDF is not uploaded to any server.

Built for phones

Open the PDF you got by email, make the change, download. It works on computers too.

One tool for everything

Edit text, sign, fill in, merge, compress: no need to go through five websites.

Frequently asked questions

Why do websites ask for a PDF under 100 KB?

Exam, visa and university portals often cap each document at 100 to 200 KB so they can handle huge numbers of applications.

Will my document stay readable?

PDFmoji first tries without touching the text. If that is not enough, it turns the pages into images and picks the sharpest version under the limit. If 100 KB is truly impossible, it tells you and gives you the smallest readable file.

Is my file sent anywhere?

No. Compression happens in your browser: the file never leaves your device.

Is it really free?

Yes. Merging, splitting, compressing, converting, signing and filling are free and unlimited. With a free account you can also edit the text of 3 PDFs a month in their original font and make 10 Assistant requests. The 7-day pass (€4.99) or PDFmoji Pro (€7.99 a month, no commitment) removes these limits.

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Edit and sign

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Artificial intelligence

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Compress a PDF to under 100 KB

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