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Compress PDF to 300 KB Online - Reduce PDF Size to 300 KB Free | ZeroKB

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Compress PDF to 300 KB Online

Compress a PDF to a target size of 290 KB to 299 KB while keeping text, fonts and vector content as clear as possible.

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Target size: 290 KB - 299 KB
The tool tests quality-preserving PDF compression profiles and keeps only a result inside this target range.
Original Size
Compressed Size
Size Reduction
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How to Compress PDF to 300 KB

1

Upload PDF

Select or drag and drop the PDF you want to compress.

2

Start Compression

Click Compress to 300 KB and let the browser test suitable profiles.

3

Check Size

The tool accepts a result only when it reaches 290 KB - 299 KB.

4

Download

Download the generated PDF after successful compression.

Compress PDF Features

1M

290-299 KB Target

The accepted output is kept inside the requested 290 KB - 299 KB range.

✓

Quality First

Text and vector content are preserved instead of converting every page into a bitmap.

⚡

Browser Processing

Compression runs locally in your browser using WebAssembly.

🔒

Private Processing

Your PDF is processed on your device rather than uploaded to a server.

Compress PDF FAQ

Not every PDF can reach this narrow target range without changing image quality. The tool accepts only a candidate inside the target range; if no suitable candidate is found, it tells you instead of pretending that the target was reached.
The compression engine uses Ghostscript PDF rewriting rather than rendering every page into a JPEG image. Text and vector elements are therefore not intentionally flattened into page images. Image-heavy PDFs can still require image downsampling to reach a small target size.
No. This page is designed for browser-side processing with WebAssembly. Your PDF is kept in the browser during compression.
The browser needs to download and initialize the Ghostscript WebAssembly engine the first time. Later use can be faster because the browser may reuse its cached resources.