Compressing PDFs to 200KB using a simple client-side approach

PDF size limits are still annoying.

I’ve run into this problem many times while filling online forms or uploading

documents. A lot of websites still ask for PDFs under very specific limits,

like 200KB or 1MB, which sounds small until you actually try uploading a file.

While working on a small React project, I decided to experiment with a

client-side PDF compression tool to see how much can realistically be done

inside the browser.

What this tool is about

This is not meant to be a replacement for full-featured PDF editors.

It’s more of a lightweight solution for common cases.

The tool focuses on:

• Running fully in the browser


• No server uploads


• Simple file selection


• Handling strict size limits like 200KB

Why I tried client-side compression

The main reason was privacy.

For many documents, uploading files to a server just to resize them feels

unnecessary. Doing everything locally keeps things simple and avoids storing

files anywhere.

It’s also surprisingly fast for smaller PDFs.

Live version

I’ve put a working version online so it’s easier to understand how it behaves

in real use:

Compress Now !

When this works well

From my testing, this approach works best for:

• Form submissions with strict limits


• Quick document uploads


• Mobile users


• Situations where privacy matters more than perfect quality

Final notes

Browser-based tools are getting better every year.

For basic use cases, client-side PDF handling is actually quite practical.

If you’re building React apps or experimenting with browser APIs, this kind of

tool is worth exploring.