PDF Compressor
Shrink the file size of your PDF documents. Everything runs on your device — your file is never uploaded anywhere.
What Does This Tool Do?
The PDF Compressor shrinks the file size of large PDF documents. It's worth understanding how it works: each page is rendered to a high-resolution image and repacked into a new PDF. This reduces file size significantly, but text in the resulting PDF is no longer selectable or searchable.
How to Use It
- Drag your PDF files into the box, or click to browse.
- Choose "Light", "Balanced", or "Max Compression".
- Click "Download" on each file, or "Download All" to grab them at once.
Supported File Formats
This tool only accepts .pdf files. If you need to keep selectable, searchable text, sharing the file as-is may be a better option than compressing it.
Related Tools
Advantages
- Send large PDFs without hitting email attachment limits.
- Choose your own balance between quality and file size with three levels.
- Compress several PDFs at once and download them all together.
- Because nothing is uploaded, confidential documents stay private.
- No sign-up, no usage limits — free to use as often as you like.
Why Your Files Are Safe
This tool runs entirely client-side: your PDF is never uploaded to a server. Page rendering uses pdf.js and repacking uses pdf-lib, both running directly in your browser.
Frequently Asked Questions
Is compressing a PDF free?
Yes, it's completely free and requires no sign-up.
Does compression affect the text in my PDF?
Yes. Because this tool converts pages into images, text in the output PDF is no longer selectable or searchable — skip it if you need to keep selectable text.
Which compression level should I choose?
Pick "Light" if quality matters most, "Balanced" for a good middle ground, or "Max Compression" for the smallest possible file.
Can I compress a password-protected PDF?
No, a password-protected or corrupted PDF can't be opened and you'll see an error message.
Are my files uploaded to a server?
No. The entire compression process happens in your browser.
Guides to PDF size, quality choices, and the compression workflow:
How to Reduce PDF File Size → Step-by-Step PDF Compression →