Compress PDF to 100KB

Shrink a PDF to an exact size such as 100KB or 200KB.

Your files are processed on your device and are never uploaded.

Shrink a PDF to the exact size an upload form asks for. Enter a target such as 100 KB, 200 KB, 500 KB or 1 MB – 100 KB is preset on this page – and the tool finds the best quality that still fits under it.

Sizes like this are typical for job applications, visa and passport portals, bank and KYC uploads, insurance claims and university admission forms.

How to Compress a PDF to 100 KB

Choose your PDF.
Check the target size: 100 KB is set. Tap another size or type your own in KB.
Pick a level if you want: Low for the best quality, Recommended, or Extreme for the smallest file. Tick Black & white for scanned text documents.
Click Compress PDF and download the result. The new size is shown before you save.

How It Reaches an Exact Size

Each page is turned into an optimised image, and the tool tries different resolutions and quality levels until the whole file lands just under your target. That is why it can reach very small sizes that ordinary compressors cannot. The trade-off: text in the result is part of the image, so it can no longer be selected or searched.

If you need selectable text and only a moderate reduction, use the PDF Compressor instead – it re-encodes only the pictures inside the PDF.

Tips for Very Small Sizes

Fewer pages, smaller file. A 10-page PDF under 50 KB leaves only about 5 KB per page. Remove pages you do not need with Remove PDF Pages first.
Black & white makes text scans much smaller and often clearer.
Scan at a sensible resolution. 150–200 DPI is enough for documents; 600 DPI scans start huge.
Check readability. Zoom into the result before uploading, especially for small print and signatures.

Other Target Sizes

Compress PDF to 20KB Compress PDF to 50KB Compress PDF to 200KB Compress PDF to 300KB Compress PDF to 500KB Compress PDF to 1MB Compress PDF to 2MB Compress PDF to 5MB

Is your PDF too small for a form with a minimum size? Use Increase PDF Size.

Private and Free

Compression runs in your browser – your certificates, ID proofs and bank documents are never uploaded. No sign-up, no watermark and no daily limit.

Frequently Asked Questions

How do I compress a PDF to 100 KB?

Choose the PDF – the target of 100 KB is already set – and click Compress PDF. Download the file once it shows a size under 100 KB.

Will the PDF be exactly 100 KB?

It will be at or just under 100 KB, never above, so upload forms with a maximum size accept it.

Why can't I select text after compressing?

To reach an exact size, every page is turned into an optimised image. If you need selectable text, use PDF Compressor, which keeps text but cannot hit exact sizes.

My PDF looks blurry. What can I do?

The target is very small for the number of pages. Remove unneeded pages, choose Black & white for text documents, or use a slightly larger target.

Can I choose a different size?

Yes. Tap one of the ready sizes or type any value in KB.

Is my PDF uploaded to a server?

No. It is compressed in your browser and never leaves your device.

Is Compress PDF to 100KB free to use?

Yes. Compress PDF to 100KB is completely free, with no sign-up, no watermark and no limit on how many times you use it.

Are my files uploaded to a server?

No. Your files are processed directly in your web browser on your own device. Nothing is uploaded or stored, and the file is gone from memory when you close the tab.

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