Free Online PDF Compressor
Optimize and shrink PDF documents without leaving your device. Choose a compression level that fits email attachments, web uploads, or archival storage — all processed locally in your browser.
Click to upload or drag & drop PDF files here
Select one or more PDF files — compress individually or merge first
100% Private & Secure — Local Browser Processing
Your privacy is our top priority. Unlike other online tools, we never upload your files to any server. Everything is processed instantly inside your web browser.
- Zero Server Uploads: Sensitive data never leaves your device.
- 100% Safe: Perfect for confidential business contracts and personal PDFs.
- Instant Speed: No queueing or waiting for server downloads.
How to use this tool
- Click the upload area or drag and drop one or more PDF files.
- Select a compression level: Balanced (HD output), Strong (under 2 MB), or Maximum (under 1 MB).
- Click Compress PDF — or use separate / merge options when multiple files are uploaded.
- Download your smaller PDF instantly. No account or software required.
Frequently asked questions
Will compressing a PDF reduce text quality?
Text stays sharp because compression mainly optimizes embedded images and redundant structure. Balanced mode prioritizes visual fidelity; Strong and Maximum apply tighter limits for smaller file sizes.
Is it safe to compress private documents here?
Yes. Files are processed entirely inside your browser and are never uploaded to our servers. Your documents never leave your computer during compression.