Reduce PDF file size with custom compression — set quality, target size, DPI. 100% private, nothing uploaded.
Custom compression level • Target file size • Adjust DPI • 100% browser-based
PDF files only • Set compression level and download the smaller PDF instantly
If set, the tool will run multiple passes to get close to your target size. Minimum achievable depends on PDF content.
| Original size | — |
| Compressed size | — |
| Space saved | — |
| Reduction | — |
| Pages processed | — |
| Quality used | — |
| Render DPI | — |
Set any quality from 1–100% or choose a preset. You control the tradeoff between size and quality.
Enter a target like 500 KB or 2 MB and the tool auto-adjusts quality to get as close as possible.
Your PDF never leaves your browser. All compression happens locally on your device. Zero uploads.
Compress PDF is a free online tool that reduces the file size of your PDF documents instantly in your browser. You can set a custom compression level, target a specific file size, or use presets like Low, Medium, High and Maximum compression. No file is ever uploaded to any server — all processing happens on your device, keeping your documents completely private.
How to use: Drop or select your PDF file, choose a compression level or enter a target file size, then click Compress PDF. Your compressed PDF downloads immediately.