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Free PDF Compressor — No Signup Required

Compress PDF Files Online

Reduce your PDF file size by up to 80% while maintaining readability. Perfect for email attachments, web uploads, and storage savings. Free, fast, and no watermarks.

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All transfers secured

Auto Deleted

Files removed in 2 hours

Lightning Fast

Process in under 5 seconds

Private & Safe

We never read your files

Works Anywhere

Any browser, any device

No Waiting

Instant download ready

Select a PDF to compress

Drag and drop or click to browse

Choose PDF File

Max 100MB · Files deleted after 2 hours

Compression Level

How to Compress a PDF File — Complete Guide

1

Upload your PDF

Select or drag your PDF file into the upload area. PDFly supports files up to 100MB for free users.

2

Choose compression level

Pick Low for best quality, Recommended for balance, or Max Compression for the smallest possible file size.

3

Download compressed file

Click "Compress PDF Now" and download your reduced-size PDF instantly. See exactly how much space you saved.

PDFly's PDF compressor uses advanced lossless and lossy compression algorithms to reduce your PDF file size while preserving readability. Whether you need to shrink a PDF to email it, upload it to a web form with a size limit, or save storage space, PDFly handles it in seconds.

Our compressor works on scanned PDFs, image-heavy documents, presentations, and text-based reports. Unlike many online tools, PDFly never adds watermarks or degrades your document's text quality — only image resolution is reduced at higher compression levels.

Frequently Asked Questions

Everything you need to know about merging PDFs with PDFly

You can merge up to 20 PDF files in a single operation using PDFly for free. Need to combine more? Create a free account to unlock batch merging of up to 100 files at once, with priority processing speed.