Drag & drop PDF here
or click to browse — max 100MB
Our free PDF compressor helps you reduce PDF file sizes while maintaining readable quality. Perfect for email attachments, website uploads, or saving storage space. Choose between different compression levels for optimal results.
Files never leave your browser.
WASM-accelerated optimization.
Up to 90% size reduction.
Crystal clear text & vectors.
Optimize your documents
Reduce PDF file size significantly without losing quality. Our free online PDF compressor makes it easy to shrink large files for email and sharing.
Drag & drop PDF here
or click to browse — max 100MB
Follow these industry-standard steps to ensure your PDF is optimized for its intended purpose, whether that's professional printing or high-speed web delivery.
Click the 'Choose File' button or drag your PDF directly into the secure upload zone. Our tool supports files up to 100MB for local processing.
Choose between 'Balanced' (recommended), 'Extreme' (smallest size), or 'High Quality' (best resolution). This adjustment tells the algorithm how aggressively to downsample images and optimize streams.
Hit the 'Compress PDF' button. Using WebAssembly, our tool optimizes your document's internal structure and image data locally in your browser.
Once the progress bar reaches 100%, your newly optimized file is ready. Download it instantly to your device. No email or registration required.
Discover how professionals use this tool in real-world scenarios.
Gmail, Outlook, and Yahoo often reject attachments over 20-25MB. Compress your PDF to ensure your important documents reach their destination without bounce-backs.
Example
Shrink a 45MB portfolio to a sleek 8MB PDF ready for any email recipient.
Stop paying for extra storage. By compressing your PDF archives, you can fit 5x more documents in the same Google Drive, Dropbox, or iCloud space.
Example
Turn a 10GB folder of scanned receipts into a compact 2GB organized archive.
Large PDFs on your site hurt Core Web Vitals and SEO. Use our optimizer to create fast-loading downloads that improve user experience and search rankings.
Example
Optimize a technical whitepaper from 15MB to 3MB for instant mobile viewing.
Most government and legal portals have strict 5MB or 10MB upload limits. Our tool helps you meet these requirements without sacrificing text readability.
Example
Compress scanned court filings or tax documents to meet strict portal requirements.
"Not all PDF compressors are created equal. Most tools simply lower image quality, but we tackle the files internal structure."
When you use our **free online PDF compressor**, you aren't just making the file smaller; you're making it smarter. Standard PDFs often contain redundant data like unreferenced font glyphs, duplicate image streams, and bulky metadata that adds useless weight to your documents.
Privacy is our core feature. Traditional online PDF tools require you to upload your sensitive contracts, medical records, or financial statements to a remote server. This creates a massive security vulnerability. Our tool uses **WebAssembly (WASM)**, allowing the heavy-duty compression algorithms to run directly in your browser. Your data NEVER touches our servers, ensuring 100% compliance with privacy standards like GDPR and HIPAA.
Removing unused character sets from embedded fonts to save hundreds of kilobytes without affecting display.
Wrapping many small PDF objects into a single compressed stream to reduce the overall file header size.
Automatically adjusting image DPI (Dots Per Inch) based on your selected quality, ensuring pixel-perfect results on screens.
Expert advice from PDF Architecture Specialists
If your PDF is mostly photos (like a portfolio), use the 'Extreme' setting to see the largest size reduction with minimal visual impact on mobile screens.
For PDFs containing both text and diagrams, 'Balanced' mode uses smart font subsetting and intelligent downscaling to keep text crisp while shrinking images.
Since all processing happens in your browser via WebAssembly, your sensitive financial or legal documents are never uploaded to our servers. Your data stays 100% private.
Compression can sometimes invalidate digital signatures. Always run the compressor BEFORE adding your signature in the 'Sign PDF' tool to avoid technical issues.
These tips come from our team of document processing engineers with over 10 years of combined experience in PDF technology, file conversion, and digital document workflows. We've processed millions of documents and learned what works best.
Trusted by professionals worldwide for secure, reliable document conversion.
"The PDF to Word conversion is the best I've used. It actually keeps the formatting, which saves me hours of retyping."
"Signing documents online has never been easier. Secure, simple, and no account needed. My team loves it."
"The developer-focused tools like Markdown to Word are a lifesaver. Clean output, no formatting issues. Highly recommended."
To reach a specific target like 200kb, select our 'Extreme Compression' mode. This aggressively optimizes image data and removes redundant metadata. While there is a slight trade-off in image resolution, text remains perfectly sharp and readable.
Yes, it is the safest option available. Unlike other 'online' tools that upload your file to a remote server, our tool uses WebAssembly technology to process everything locally on your device. Your file never leaves your computer.
Absolutely. Choose the 'High Quality' or 'Balanced' setting. This focuses on optimizing the PDF's internal structure (like stream objects and font metadata) rather than aggressively downsampling images, ensuring it remains print-ready.
If a PDF doesn't shrink much, it may already be optimized or contain encrypted content that cannot be modified. Additionally, PDFs that are entirely vector-based (like complex CAD drawings) have less 'fat' to trim compared to image-scanned documents.
No. Our tool is 100% browser-based. It works on Chrome, Safari, Firefox, and Edge across Windows, Mac, iOS, and Android without any plugins or downloads.
Simply upload your document here, select 'Balanced' compression, and download the result. Gmail's limit is 25MB, and our tool typically achieves a 50-80% reduction for standard business documents.
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