RELATED TOOLS
Related Resize Tools
Resize images in different units, formats, or file sizes — all in one place.
Custom width & height in pixels, inches, cm, or mm.
Resize multiple images together and download everything in one ZIP.
Adjust image size in inches with DPI for printing.
Metric sizing for print and international formats.
Precise sizing for ID photos and official documents.
Optimize image size and DPI for high-quality prints.
Resize dimensions and compress file size in one step.
Resize or change image proportions for any layout.
Scale images to 25%, 50%, 75%, 200%, or a custom percentage.
FEATURES
PDF Compression with Clear Choices
Use a simple three-level preset or target a specific file size, then review the real result.
Private Browser Processing
Your PDF stays on your device during compression. Pages are processed locally rather than sent to a compression server.
Three Compression Levels
Light, Medium and Strong Compression use the same page-image compressor at 96 DPI, with different JPEG quality settings.
Target File Size
By Size measures real PDF outputs and adjusts quality within processing limits. Page resolution remains at 96 DPI, even when the target cannot be reached.
More Options When Needed
Adjust Quality from 1 to 99%. Higher values favor better visual quality; lower values favor smaller files. The percentage is a setting, not a promised size reduction.
Honest Compression Results
The final PDF is checked against the original or requested target. The tool does not claim a target was reached when the actual output is still too large.
Batch PDF Compression
Add multiple PDF files and process them one at a time. Download completed files individually or together in a ZIP, even if another file cannot be compressed.
HOW IT WORKS
How to Compress a PDF
Start with Medium Compression, adjust Quality when needed, or enter a target size.
STEP 1
Select Your PDF
Choose unencrypted PDF files from your device or add more to the file queue. Check the displayed file count, total size, and per-file limits.
STEP 2
Choose Quality or Size
Use Light, Medium, or Strong Compression in By Quality, or switch to By Size and enter the file size you want the compressor to try to reach.
STEP 3
Review and Download
Click Compress PDF to open the download page, where your PDF files are processed one at a time. Compare the actual input and output sizes and review readability before sharing.
Prepare a Smaller PDF for Sharing
Try a preset or target size on your document, compare the saved bytes, and keep the original until you have reviewed the result.
FREQUENTLY ASKED
PDF Compression Questions
Understand what the three levels and target-size mode change.
Medium Compression starts at Quality 40%. Light uses 80% and Strong uses 20%. All levels convert pages into images at 96 DPI. Review small text and fine details before sharing.
All compression levels render each visible page to a JPEG-backed PDF at a fixed 96 DPI. This can reduce image-heavy and mixed PDF files more aggressively, but text selection and search, links, bookmarks, forms, and interactive annotation structures are not retained.
Quality is adjustable from 1 to 99%. Higher values improve JPEG quality, but cannot restore detail lost when pages are rendered at 96 DPI. Lower values generally make a smaller file.
The compressor samples up to two pages at two quality settings to choose a starting quality, then adjusts using actual output sizes. Processing is subject to a time limit. Resolution stays at 96 DPI. It returns the highest-quality measured result within the target, or the smallest file found if none fits. The target size is not guaranteed.
Compressed pages become images. Text selection and search, links, bookmarks, interactive forms and annotation structures are not retained. If the original file is returned unchanged, its existing features remain.
Some PDF files, especially compact text documents, become larger when converted to page images. The tool keeps the original when compression does not make it smaller, or when the original already meets the target.
No. The compression workflow reads and processes the PDF files locally in your browser. Your documents are not sent to a compression server.
Encrypted PDF files are not supported. Rewriting a digitally signed PDF invalidates its signature, so the tool warns when a signature is detected before processing continues.
QUICK ACCESS
Popular resize presets
Jump to the most commonly used image sizes for your projects
Popular
Resize Image to 64x64
Resize Image to 128x128
Resize Image to 256x256
Resize Image to 300x80
Resize Image to 300x300
Resize Image to 512x512
Resize Image to 600x600
Resize Image to 640x360
Resize Image to 1000x1000
Resize Image to 1024x576
Resize Image to 1024x1024
Resize Image to 1280x720
Resize Image to 1400x1400
Resize Image to 1500x1000
Resize Image to 1600x1600
Resize Image to 1920x1080
Resize Image to 2048x1152
Resize Image to 2048x2048
Resize Image to 2560x1440
Resize Image to 3000x3000
Resize with Aspect Ratio
Convert Image to 4:5 Aspect Ratio
Convert Image to 9:16 Aspect Ratio
Resize Image to 35x45 mm
Resize Image to 1x1 inch
Resize Image to 2x2 inch
Resize Image to 4x6 inch
Resize Image to 3x4 cm
Resize Image to 4x4 cm
Resize Image to 4x6 cm
Resize Image to 4.5x3.5 cm
Resize Image to 15 kb
Resize Image to 20 kb
Resize Image to 30 kb
Resize Image to 40 kb
Resize Image to 50 kb
Resize Image to 100 kb
Resize Image to 150 kb
Resize Image to 200 kb
Resize Image to 500 kb
Resize Image to 1 mb
Resize Image to 2 mb
Resize Image to 5 mb