Compress PDF Free Online — Reduce PDF Size
Compress PDF free online to shrink bloated document sizes for easy emailing and uploading, all processed client-side without compromising document privacy.
Choose or Drop PDF File
100% processed in your browser — files never leave your device
How to Use Compress PDF — Free in Your Browser
Email attachments and web portals frequently impose strict 5MB or 10MB limits. Our compress pdf free online utility strips redundant metadata and offers visual image downsampling to reduce pdf size effortlessly.
Step-by-Step Instructions
- 1Drop your PDF file into the compress workspace.
- 2Choose between 'Lossless Compression' (removes duplicate objects and optimizes stream tables) or 'Strong Compression' (downscales high-DPI page images).
- 3Click 'Compress PDF' to process the document.
- 4Compare the original size versus new size and download your compact PDF.
Everyday Practical Uses
- Shrinking large scanned government forms to comply with strict online portal upload limits.
- Compressing portfolio presentations to send as lightweight email attachments.
- Archiving documents efficiently to save local disk and mobile device storage.
Helpful Tips
- Already-optimized vector PDFs with primarily text will see modest reductions; scanned image PDFs will experience dramatic size drops.
- Use Strong mode for scanned paperwork where text readability is more important than raw photo fidelity.
- Review the resulting document to ensure clarity matches your requirements.
PDFs that already have heavily compressed JPEG streams cannot be compressed further without lowering image quality.
No upload is ever performed. Compression is calculated entirely within client-side WebAssembly.
Frequently Asked Questions About Compress PDF
Other Free PDF Tools
Switch to any other tool in one click — no file upload and no sign-up required.
Merge PDF
OrganizeMerge multiple PDF files into one combined PDF for free. Reorder pages with ease. 100% browser-based, no upload and no sign-up required.
Split PDF
OrganizeSplit PDF files into individual single-page PDFs or select custom page ranges. Fast, 100% private, and processed entirely inside your browser.
Extract PDF Pages
OrganizeExtract selected pages from any PDF document for free. Choose specific page numbers or ranges and download a new PDF instantly without uploading.
Delete PDF Pages
OrganizeDelete unwanted pages from your PDF documents for free online. Keep only the pages you need with zero file upload and complete device-level privacy.
Repair PDF
OptimizeRepair corrupt or damaged PDF files directly in your browser. Re-index and recover readable pages without sending sensitive documents to a server.
Rotate PDF
EditRotate PDF pages permanently online for free. Rotate all pages or specific page ranges by 90, 180, or 270 degrees in your browser with no upload.
Add Page Numbers
EditAdd page numbers to PDF documents for free. Customise position, starting number, and format without uploading your files to any remote server.
Watermark PDF
EditAdd custom text watermarks to PDF files online for free. Adjust opacity, font size, diagonal rotation, and repeat tiling right in your browser.
Remove Watermark
EditRemove or cover text and header watermarks from PDF files for free in your browser. Clean your documents without uploading files to third-party servers.
JPG to PDF
ConvertConvert JPG and PNG images into a clean PDF document for free. Reorder images, choose page sizes (Fit, A4, Letter), and download without server upload.
PDF to JPG
ConvertConvert PDF pages to high-quality JPG images for free in your browser. Render each page to an image and download as single files or a complete ZIP.
PDF to Text
ConvertExtract text from PDF documents for free online. Copy text with preserved page breaks or download as a .txt file without uploading your PDF anywhere.
Edit PDF
EditEdit PDF files online for free in your browser. Add new text boxes, notes, and white-out cover rectangles directly on document page previews.
Organize PDF
OrganizeOrganize and rearrange PDF pages online for free. Drag and drop visual page thumbnails to reorder or remove pages with 100% browser-based security.
Add Image to PDF
EditAdd an image, logo, or signature stamp to your PDF documents for free online. Position and scale your image on any page without uploading files.