Compress PDF
Reduce PDF file size online — free, no signup. Shows exact size reduction after compression.
Click to upload or drag and drop
PDF — up to 50MB
Files are processed securely and deleted within 1 hour. We never store or share your files.
How to compress a PDF
- Upload your PDF by clicking or dragging it into the upload area.
- The compressor applies lossless optimization and image stream compression.
- Download your smaller PDF — the tool shows you exactly how much space was saved.
Why use Formfy's PDF compressor?
Unlike tools that simply re-save your PDF, Formfy's compressor uses object stream optimization — a technique that reduces overhead in the PDF's internal structure. PDFs with large images also benefit from image stream recompression.
After compression, you'll see the exact reduction percentage and file sizes so you always know what changed. Every file is deleted within 1 hour. No account, no watermarks.
Frequently Asked Questions
Is PDF Compressor free?
Yes — PDF Compressor is completely free to use. No signup, no account, no subscription required. Upload your file and get your result instantly.
Is it safe to upload my PDF?
Your files are transferred over an encrypted HTTPS connection, scanned for viruses, and permanently deleted from our servers within 1 hour. We never share, sell, or use your files for any purpose other than the conversion you requested.
Do you keep my files after conversion?
No. Files are automatically and permanently deleted from our servers within 1 hour of upload. We do not store, archive, or back up any user files.
What is the maximum file size?
The maximum file size is 50MB. Most PDFs are well under this limit. If your file is larger, consider splitting it first using our free Split PDF tool.
Does it work on iPhone, Android, Mac, and Windows?
Yes — PDF Compressor works in any modern web browser on any device. No download or installation required.
Do I need to sign up or create an account?
No account is required to use this tool. All 28 Formfy PDF tools are completely free and anonymous. Create a free Formfy account only if you want to collect online form responses or send documents for e-signature.
How much will my PDF be compressed?
Compression results vary based on the content of your PDF. PDFs with many large embedded images typically see 20–60% reduction. Text-only PDFs or PDFs already optimized may show minimal reduction — in that case, you'll see a note that the file was already well-optimized.
Will compression affect the quality of my PDF?
The compressor uses lossless optimization techniques and re-streams object data for maximum size reduction. Image quality is preserved. You may notice slightly reduced resolution on very high-DPI embedded images, but text and vector elements remain crisp.