Compress PDF Online Free | Reduce PDF File Size

Compress PDF Online — Three Modes, Full Control

No downloads needed. Upload your PDF and choose from Basic, Strong, or Extreme compression — the engine intelligently optimizes embedded images while keeping text crisp. Completely free with no watermarks.

Three compression modes for every scenario: Basic for fidelity, Strong for balance, Extreme for max shrinkage — up to 99% reduction
Batch upload multiple PDFs and compress them all at once
Text and vector elements stay crisp — only embedded images are intelligently optimized
One-click post-compression workflows: merge, encrypt, or convert — no re-uploading needed

Beyond Compression: Precision Balance Between Size & Quality

Three Modes, Precisely Matched to Your Needs

Basic mode reduces size with virtually no visible difference — perfect for contracts and reports. Strong mode prioritizes slimming for email attachments and online sharing. Extreme mode achieves maximum compression — ideal for text-heavy documents.

Batch Processing in One Go

Drag in multiple PDFs at once — the system compresses them in parallel. Each file gets your chosen compression level applied independently. Download individually or grab everything as a ZIP.

Text-Preserving Smart Optimization

The engine separates text from image layers: text and vector graphics output with zero loss, while only embedded bitmaps undergo intelligent resampling and encoding optimization — your documents stay readable after compression.

Chain Multiple Operations

Combine with compression, merging, or format conversion in one continuous flow — no re-uploading.

Confidential Files Protected

All processing happens on EU servers with GDPR compliance. Files are permanently deleted after use — no copies, no caching.

No App Required

Runs in your browser on any device. Desktop, phone, tablet — just open the page and convert.

Compress a PDF Online in Just 3 Steps

Upload Your PDF

Click "Choose Files" or drag and drop one or more PDFs into the secure workspace.

Choose Compression Level

Select Basic, Strong, or Extreme depending on your needs. The system estimates the compressed size in real time.

One-Click Compress & Download

Hit "Compress" and the system finishes in seconds — download your significantly smaller PDF for free.

PDF Compression FAQ

What's the difference between the three compression modes?

Basic mode reduces file size with virtually no visible quality loss — ideal for contracts, reports, and formal documents. Strong mode further shrinks the file with a slight reduction in image quality — great for email attachments and web uploads. Extreme mode achieves the smallest possible size — best for text-heavy documents.

Will compression affect text clarity?

No. The compression engine only optimizes embedded bitmap images. Text and vector elements maintain 100% original clarity with zero degradation.

How much can I compress?

Compression ratio depends on the original content. Image-heavy PDFs can be reduced by up to 99% in Extreme mode. Text-dominant documents have less compression headroom but still achieve noticeable size reduction.

Can I compress multiple PDFs at once?

Yes. Multi-select or drag-and-drop for batch upload. All files are processed in parallel — download individually or as a ZIP archive.

What are the free plan limits?

Free users can compress PDFs up to 100 MB with no usage limits and no watermarks. Need more? Upgrade to Pro for files up to 2 GB.

Is it safe to compress PDFs containing confidential information?

Your files are safe. All data is transferred via 256-bit encryption, processed on EU-based servers under GDPR compliance, and permanently deleted after processing.

Can I continue processing after compression?

Yes. After compression, the system recommends follow-up tools like merging, watermarking, and format conversion. Click to continue — no re-uploading needed.

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