About Compress PDF
This tool lets you compress PDF files quickly on any device. It works entirely in the browser, so nothing is uploaded to a server. Your files stay private. You can upload up to ten PDFs, each up to 100 MB, choose the compression level, monitor progress, and get a clean summary of how much space you saved.
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Compress PDF
How the PDF Compressor Works
The compressor reduces the size of a PDF by lowering embedded image sizes, removing unused data, and applying a more efficient structure. The tool guarantees at least 20% size reduction, and higher compression levels can reduce more, depending on your settings and the file content.
Key Features
1. Works on All Devices
The layout is mobile-first. Every section stacks vertically, and all buttons, sliders, and progress bars are finger-friendly on phones and tablets.
2. Private and Secure
Everything runs in your browser. No files are uploaded or stored.
3. Multi-File Support
You can upload and compress up to 10 PDFs in one batch.
4. Large File Handling
Each file can be as large as 100 MB.
5. Adjustable Compression Level
A simple slider lets you choose how aggressive the compression should be.
6. Real-Time Progress Bar
A visual progress bar shows your compression progress across all files.
7. Compression Summary Modal
After compression, you get a clean summary showing:
- Original file size
- Compressed size
- Total % saved
- Per-file stats
How to Use the PDF Compression Tool
Step 1: Upload Your PDF Files
- Click the upload field to select your PDF files.
- You can choose one file or up to ten.
- If any file is larger than 100 MB, the tool will ask you to pick a smaller one.
Step 2: Choose Compression Level
Use the slider to set the compression strength.
- Lower settings keep the quality slightly higher
- Higher settings give smaller file sizes
The displayed percentage helps you pick the right balance.
Step 3: Start Compression
Press the Start Compression button. The tool begins working through your files one by one.
You will see:
- A live progress bar
- Smooth transitions showing your compression progress
- No page reloads or interruptions
Step 4: View the Summary
Once compression is done, a modal pops up. Here you can see:
- File names
- Before and after sizes
- Exact compression percentage
- Total space saved
Step 5: Download Your Files
Each compressed file will be ready to download instantly.
Why Compress PDFs?
Most PDFs contain heavy images or unused metadata. Compressing them helps you:
- Upload faster
- Save storage space
- Share over email and messaging apps
- Reduce load times on websites
- Keep workflows efficient
Best Practices for Best Results
- Use medium to high compression for reports, brochures, and scanned documents
- Use lighter compression for legal papers or PDFs containing detailed diagrams
- If you have a huge scanned PDF, set compression to maximum for the best impact
- Compress in batches to save time
Frequently Asked Questions
1. Does this PDF compressor upload my files?
No. Everything runs locally in your browser.
2. Is there a file limit?
You can upload up to 10 files, each up to 100 MB.
3. How much can I compress a PDF?
The tool always provides at least 20% compression, and can often save more depending on your settings.
4. Will the quality drop?
Only images are reduced. Text quality stays almost identical.
5. Can I use this on a phone?
Yes. The design is mobile-friendly and stacks vertically for small screens.
