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Reduce PDF file size while maintaining quality — perfect for email attachments and web uploads.
Compress PDFs when an upload form, email attachment, or archive has a strict file size limit. The best result depends on the images inside the PDF, whether the file was already optimized, and how much memory the browser has available. Always compare the compressed copy with the original because aggressive compression can soften scans, charts, photos, and small text.
The file may already be optimized or mostly vector text; expect limited savings from already-compressed documents.
Use a higher quality setting and inspect image-heavy pages at the zoom level your audience will use.
Close other tabs, split the PDF into smaller sections, or process it on a device with more RAM.
Unlock the file if you have permission and confirm it opens correctly before compressing.
PDF compression is intended to run in the browser for normal use, so files are processed in your tab. Avoid sensitive documents on shared devices, keep the original file, and inspect the compressed copy before sending it.
Start with a valid PDF and decide whether the priority is smallest size or clearer images.
Run the compressor, then inspect text, scans, charts, and image-heavy pages beside the original.
Save the compressed copy only after confirming it opens correctly and meets the upload or sharing limit.
Select and upload the PDF file you want to compress.
Select from light, medium, or high compression levels based on your needs.
Adjust quality settings and optimization options for best results.
Start compression and download your optimized PDF file.
Advanced algorithms that optimize images, fonts, and structure without quality loss.
Choose from light, medium, or high compression based on your quality requirements.
Maintains text clarity, vector graphics, and searchable text in compressed files.
Quick compression with real-time progress tracking and status updates.
All processing happens locally in your browser with no server uploads.
Compress PDFs of any size with no artificial restrictions or limitations.
Compress large PDFs to meet email attachment size limits while maintaining quality.
Optimize PDFs for faster web uploads and better user experience.
Reduce storage space for archived documents and backups.
Use light compression for documents with images, medium for general use, and high for maximum size reduction.
Balance file size reduction with quality requirements for your specific use case.
Always review compressed files to ensure quality meets your standards before sharing.
For best results, optimize images in your PDF before compression for maximum efficiency.
It resamples high-resolution images, subsets unused font glyphs, compresses content streams, and removes duplicate objects. Typical reduction is 40-80% depending on the original content.
Text and vector graphics remain sharp. Only raster images are resampled. The quality slider lets you control the trade-off between file size and image clarity.
Yes, but gains diminish. A previously optimized PDF may only shrink 5-15% further since redundant data has already been removed.
Lossless removes redundant data without quality loss. Lossy additionally resamples images to lower resolution for more aggressive size reduction — typically 60-80% smaller files.
Basic compression preserves metadata including author, title, and creation date. Some tools strip metadata as part of optimization — ours preserves it by default.
PDF compression reduces file size while maintaining document quality, making files easier to share, store, and upload. Our intelligent algorithms optimize various PDF elements without compromising readability or functionality.
This tool is particularly useful when: