Free Online PDF Compressor: Private & Secure
Strip metadata, annotations, form fields, and unused objects from PDFs directly in your browser. Choose Quick, Standard, or Deep cleanup, batch process up to 10 PDFs, and download individual files or a ZIP. No uploads, no server processing, no signup.
🔒 Your files stay in your browser
For this file tool, processing happens on your device — we don't receive, store, or transmit your file contents.
What this tool does
We strip metadata, annotations, and unused objects from your PDFs. Typical reduction: 1–15% — sometimes more, sometimes less, depending on what's in the file.
What this tool doesn't do
We don't re-encode embedded images because that requires either uploading to a server or rasterizing the document. If you need a 50%+ reduction on an image-heavy PDF, a server-based tool will get you there — just know your file will leave your device.
Drop PDF files here or click to upload
Up to 10 PDFs · All processing happens locally on your device
How to Compress a PDF
- 1
Upload Your PDFs
Drag and drop PDF files onto the upload area, or click to browse. Add up to 10 PDFs for batch compression.
- 2
Choose Compression Level
Select Quick cleanup, Standard cleanup, or Deep cleanup. Each level shows exactly which non-visual PDF data will be removed.
- 3
Customize Advanced Options
Optionally fine-tune by toggling specific options in Advanced: remove metadata, annotations, or form fields.
- 4
Compress and Download
Click compress to process locally. Download individual files or all compressed PDFs as a ZIP archive.
Features
Three Compression Levels
Each level controls what gets stripped: Quick removes metadata only, Standard adds annotations and comments, Deep also removes form fields. No image quality is affected at any level.
Browser-Local Processing
For this tool, PDF cleanup uses pdf-lib running locally on your device. Selected files are not uploaded to our servers for compression.
Batch Compression
Process up to 10 PDFs simultaneously. Each file shows individual progress and results, saving time when you have multiple files to compress.
Advanced Customization
Granular controls let you remove metadata, annotations, form fields, or unused objects. Tailor compression to your specific document types and privacy needs.
Already-Optimized Detection
If a PDF is already well-compressed, the tool tells you instead of creating a slightly-larger 'compressed' version. Original file integrity is preserved.
ZIP Download
Download all compressed PDFs as a single ZIP file when batch processing. Convenient and significantly faster than downloading files individually.
Privacy & Security
PDFs often contain highly sensitive information: contracts with signatures, financial statements with account numbers, medical records, legal documents with personal details. Many online PDF compressors require uploading these files to their servers for processing. This compressor takes a different approach: the pdf-lib JavaScript library runs in your browser, using your device's CPU and memory to process files locally. For this tool, selected PDFs are not uploaded to our servers for compression.
Use Cases
Email Attachments
Reduce PDFs to fit Gmail's 25MB attachment limit, Outlook's 20MB limit, or your company's email size restrictions without uploading sensitive documents.
Job Application Portals
Many job application systems limit resume and portfolio uploads to 5MB or less. Compress your application PDFs to fit while maintaining professional quality.
Storage Optimization
Reduce storage costs in cloud services like Dropbox, Google Drive, or OneDrive by compressing PDF archives without losing them.
Faster Document Sharing
Smaller PDFs upload and download faster. Critical when sharing documents over slow connections or when working from mobile data.
Legal and Medical Records
Reduce file sizes of legal contracts, medical records, and other sensitive documents while keeping them safely on your device throughout the process.