Loading PDF Compressor...
Compress PDF Free Online — Reduce PDF File Size
Reduce PDF size without losing quality. Set exact target size in KB or MB. Batch compress multiple PDFs. 100% browser-based — files never leave your device.
Compress to Specific Size
How to Compress a PDF Online
Four simple steps — no signup needed
Upload PDF File
Drag & drop or click to browse. Supports multiple PDF files at once for batch compression.
Choose Compression Settings
Pick a preset (Maximum to Low) or set exact target file size in KB or MB.
Compress Instantly
Click Compress — processing happens in your browser, files never leave your device.
Download Result
Get your compressed PDF with exact size reduction percentage shown.
Why Use TryDocsy PDF Compressor?
Unlike other tools, we process everything locally in your browser — no servers, no uploads, no privacy risks.
100% Private — No Upload
All compression runs in your browser. Your PDFs never leave your device.
Batch Compression
Compress multiple PDFs at once. Process entire folders in one click.
Target File Size
Set exact size (e.g., 1MB, 500KB, 200KB). Intelligent binary search finds optimal settings.
Quality Presets
Maximum, High, Medium, Low — choose the right balance of file size vs. quality.
No Signup Required
No account, no email, no tracking. Just open and start compressing.
Instant Processing
Browser-based tools run immediately — no waiting for server uploads.
Frequently Asked Questions
Everything you need to know about compressing PDFs online
How do I compress a PDF file for free without losing quality?
Upload your PDF to TryDocsy's free PDF compressor, choose 'Medium' or 'Low' compression preset, and click Compress. The tool optimizes internal PDF structure while preserving text sharpness and image quality. No signup required.
What is the best way to compress a PDF to a specific size (e.g., 1MB, 500KB, 200KB)?
Switch to 'Target Size' mode in the compressor, enter your desired file size (e.g., 1MB or 500KB), and click Compress. The tool uses intelligent binary search to find the optimal compression level that meets your target size as close as possible.
How much can I reduce a PDF file size?
Typical compression reduces PDF size by 20–70%. Scanned PDFs with lots of images compress the most — often 60-80% reduction. Text-only PDFs compress less, typically 10-30%. A 10MB scanned PDF can often be reduced to 2-4MB.
Can I compress multiple PDFs at once?
Yes! TryDocsy supports batch PDF compression. Upload multiple PDF files, and the tool will compress them all one by one. Each file is processed individually, and you can download them separately or all at once.
Is my PDF uploaded to a server when compressing?
No. All compression happens entirely in your browser using JavaScript. Your PDFs are never uploaded to any server, never stored anywhere, and never accessible to anyone but you. It's 100% private and secure.
How do I compress a PDF for email attachment?
Most email providers limit attachments to 25MB. Use TryDocsy's 'Target Size' mode — set it to 20MB or lower to ensure your PDF is small enough. You can also use 'Maximum' compression for the smallest file size possible.
Does compressing a PDF remove images or reduce resolution?
TryDocsy compresses PDFs by re-encoding images at a lower quality level. Using 'Medium' or 'Low' compression preserves most visual quality while significantly reducing file size. For best results with images, avoid 'Maximum' compression if you need image clarity.
Can I compress password-protected PDFs?
TryDocsy skips password-protected PDFs during batch compression. To compress a protected PDF, you'll need to unlock it first using our Unlock PDF tool, then compress it separately.
Related PDF Tools
Other tools that work great with PDF compression