PDF Compressor
Compress PDF files online for free. Reduce PDF file size directly in your browser without uploading your files.
Your PDF is processed in your browser. Files are not uploaded to our server.
Select your PDF
One PDF file, up to 100.0 MB.
Choose a PDF to enable compression.
How to Compress a PDF
- Choose your PDF or drag and drop it onto the upload area.
- Check the file name, size and page count shown after selection.
- Pick a compression level: Low, Medium or High.
- Press Compress PDF and wait while your browser processes the file.
- Review the size saved and download the compressed PDF.
What Does PDF Compression Do?
PDF compression reduces file size by optimising how data is stored inside the PDF. This tool re-encodes embedded JPEG photos at a lower quality and, where they are very large, a lower resolution. It also compresses page data that was saved without compression and packs the file's internal structure more tightly. Pages are not converted into images, so text and vector graphics stay as they are.
Which Compression Level Should I Choose?
- Low keeps photos close to their original quality. Use it for documents you plan to print.
- Medium balances size and quality and suits most email attachments and online forms.
- High gives the smallest file, with softer photos. Use it when a portal has a strict upload size limit.
Will PDF Compression Reduce Quality?
It depends on the original PDF. Text and vector drawings are left unchanged. Embedded photos may lose some detail, more so at higher compression levels. Check the downloaded file before sharing it if image clarity matters.
Are My PDF Files Uploaded?
No. The PDF is read and compressed locally in your browser using your device's processing. It is not uploaded to ToolBandhu's server.
Why Didn't My PDF Become Smaller?
Some PDFs are already optimised, contain mostly text, or use image formats this tool does not re-encode. Processing such files can give little or no reduction, and occasionally a slightly larger file. When that happens, the tool tells you and keeps your original file as the download instead.