Is PDF Compressor completely free?

Yes, completely free with unlimited compression, no registration required, and no hidden fees or premium tiers.

How much can I reduce my PDF file size?

File size reduction typically ranges from 20-70% depending on your PDF's content and selected compression level. Image-heavy PDFs compress more than text-based documents.

Will compression affect my PDF quality?

No significant quality loss occurs with 'Low' or 'Medium' settings. 'High' compression reduces image resolution but maintains text clarity—ideal for email and web sharing.

Is my PDF file safe and private?

Yes. All compression happens locally in your browser. Files are never uploaded to servers and are automatically deleted after download. No data is stored or tracked.

What file size limit does PDF Compressor have?

Files up to 500MB can be compressed. Most standard documents (under 50MB) process within seconds.

Does PDF Compressor work on mobile devices?

Yes, works perfectly on iPhone, iPad, Android phones, tablets, and all desktop browsers without downloading any app.

Can I compress multiple PDFs at once?

Currently, compress one PDF at a time. For batch compression, repeat the process for each file—most compress in under 30 seconds each.

Why is my PDF still large after compression?

PDFs with high-resolution images, embedded fonts, or embedded multimedia compress less. Try 'High' compression level, or ensure your source PDF doesn't contain unnecessary elements.

online

PDF Compressor — online

Compress PDF files to reduce size while preserving quality. Ideal for email attachments and web upload.

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Click or drag a PDF file here

PDF files only

How to use PDF Compressor

Upload Your PDF File

Click the blue 'Choose File' button in the center of the screen. Select your PDF from your device's file explorer. The file will appear in the upload area with its original file size displayed below the filename.

Select Compression Level

Choose your compression preference from the dropdown menu: 'Low' (minimal compression, best quality), 'Medium' (balanced), or 'High' (maximum compression, smaller file). Preview the estimated output size that updates in real-time as you select each option.

Start Compression Process

Click the green 'Compress PDF' button. A progress bar will appear showing compression status. Processing typically completes within 10-30 seconds depending on file size and selected compression level.

Download Your Compressed File

Once complete, the 'Download' button will turn green and become active. Click it to save your compressed PDF to your device's Downloads folder. The new file size reduction percentage is displayed above the download button.

Frequently Asked Questions

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