Free PDF Compressor
Compress PDF files and reduce their size — instantly in your browser. No upload, no sign-up. Choose your quality level and download in seconds.
Drop your PDF here
or click to browse — PDF files only
Serious PDF Compression, Zero Uploads
Shrink bloated PDFs — contracts, brochures, scans, and reports — without sending a single byte to a server.
Up to 80% Size Reduction
Image-heavy PDFs typically shrink by 40–80% at the highest compression level. Turn 20 MB docs into 4 MB attachments.
Three Quality Levels
Low preserves print-grade quality. Medium is great for everyday sharing. High pushes for the smallest possible file.
100% Private — Never Uploaded
PDFs are processed entirely in your browser using JavaScript and the Canvas API. Perfect for contracts, legal, and NDA work.
Fast In-Browser Engine
No server round-trip means no queue and no waiting. A 50-page PDF compresses in seconds on a modern laptop.
No File Size Limits
Drop files of any size — no paywall, no watermark, no cap. Your device's memory is the only limit.
Preserves Page Layout
Pages are re-rendered at your chosen quality. Fonts, layout, and images stay visually identical to the original.
Who Uses the PDF Compressor
Anyone who's ever been told "file too large" by their email provider or upload form.
Email Attachments
Keep PDF attachments under Gmail's 25 MB cap and Outlook's 20 MB limit — without losing pages or content.
- Fit 25 MB Gmail attachment limits
- Squeeze brochures under Outlook caps
- Shrink invoices for client emails
Document Storage & Archives
Cut cloud storage costs and speed up sync by compressing contracts, manuals, and paperwork archives.
- Shrink Dropbox and Drive backups
- Archive scanned paperwork efficiently
- Speed up team Dropbox syncs
Web Publishing & Uploads
Upload whitepapers, e-books, and reports to your site faster — smaller files mean quicker downloads for visitors.
- Cut download time for gated PDFs
- Fit within CMS upload limits
- Speed up e-book delivery
How to Compress a PDF in 3 Steps
Drop your PDF onto the upload area or click to browse and select the file from your device.
Choose a compression level — Low for the best quality, High for the smallest file size.
Click Compress and download your smaller PDF file instantly — no server involved.
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Frequently Asked Questions
Answers to the most common questions about compressing PDF files online.
How much will my PDF be compressed?
Compression results depend on your PDF's content. Image-heavy PDFs typically see 40–80% size reduction. Text-only PDFs may see less. The Low quality setting preserves the best visual quality, while High gives the smallest file size.
Is my PDF uploaded to a server?
Never. All compression happens entirely in your browser using JavaScript and the Canvas API. Your file never leaves your device, and no data is sent to any server.
Will the text in my PDF still be selectable after compression?
Our compression works by rendering each page as a high-quality image and rebuilding the PDF. This process reduces file size significantly, but text will appear as images and won't be selectable. This is standard behavior for most online PDF compressors.
What quality setting should I choose?
Use Low for documents that need to look great for printing or professional use. Use Medium for everyday sharing via email or web. Use High when file size is the priority and slight quality reduction is acceptable, such as for archiving or mobile previews.