Compress PDF Online (No Upload Required)
Reduce PDF file size instantly. Secure, fast, and works directly in your browser.
Takes ~5–15 seconds
Example result
−70%
Typical for scanned PDFs
Drop your PDF here or click to upload
Your file never leaves this device
No signup · No upload · Instant download
Compress PDF to specific sizes
Compress PDF to 100KB
Extreme targets work best on short, image-heavy PDFs. Use Low quality, turn off searchable text, and try a small custom target in MB — very dense scans may still exceed 100KB.
Compress PDF to 1MB
Pick a ~1 MB custom target or start at Low quality. For multi-page scans, split the PDF first, then compress each part.
Reduce PDF size for email (25MB)
Many providers cap attachments around 25 MB (some use 10 MB). Use our 25 MB or 10 MB target presets — if the goal is not met, disable searchable text for scans or split the file.
Real compression examples
Typical outcomes for image-heavy or scanned PDF files when using stronger compression — your results may vary.
- 20 MB→~6 MB(scans, photos)
- 10 MB→~3 MB(mixed content)
- 5 MB→~2 MB(aggressive mode)
Why choose this PDF compressor?
- No upload — shrink PDF files online in your browser; files stay on your device (great for privacy and reduce PDF size for email without cloud risk).
- Fast processing — optimized pipeline with clear progress; works offline once the page is loaded.
- No account — free compression with optional targets (e.g. toward 5 / 10 / 25 MB).
- Scanned PDF friendly — turn off searchable text to compress scanned PDF pages more aggressively.
Compare with other tools
| Feature | This tool | Others |
|---|---|---|
| No upload | ✅ | ❌ |
| Free | ✅ | ⚠️ |
| Speed | Fast | Medium |
| Target size hints | Optional MB targets | Varies |
More ways people use this tool
Need to compress PDF to 100kb or as small as possible? Pick a low target in MB, use Low quality, and disable searchable text for scans. To reduce PDF size for email, try a 10 MB or 25 MB target first. For compress scanned PDF workflows, use the scanned preset — then merge PDF or split PDF if you need smaller parts. Export pages? Try PDF to image. Everything runs as a shrink PDF file online flow with no server upload.
How to Compress PDF:
Upload PDF
Click "Upload & Compress PDF" or drag and drop your file
Choose Quality
Select compression quality (Low, Medium, High)
Compress & Download
Click "Compress PDF" and download the compressed file
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Use this tool to compress PDF online and reduce file size for email, web forms, and faster sharing. It works best for scanned or image-heavy files, and it includes a text-safe mode for documents where search/selectable text must stay intact.
Everything runs in your browser with no file uploads. If you also need to reorganize documents, use Merge PDF and Split PDF before or after compression.
What Is a PDF Compressor?
A PDF compressor reduces document size so files are easier to send and upload. Most savings come from image-heavy pages (for example scans, brochures, or photo PDFs), while text-only files usually see smaller reductions.
This tool supports two approaches: optimize mode (keeps text searchable) and image-based mode (stronger compression for scanned PDFs).
When to Use a PDF Compressor
Email Attachments
Reduce PDF size to fit common attachment limits (often 10-25MB), including client deliverables, invoices, and reports.
Web Uploads
Pass upload limits for job portals, government forms, and CMS systems while improving upload speed on slower networks.
Storage Optimization
Save cloud and local storage when archiving batches of PDFs without changing your original files.
Mobile Sharing
Smaller PDFs open faster on phones, use less mobile data, and are easier to share in messaging apps.
Document Archiving
Keep long-term backups lean while preserving readability for future retrieval.
How to Use This PDF Compressor (Step-by-Step)
Uploading PDF
Click "Select PDF" or drag and drop your file. Supported limits are 50MB and 100 pages to keep browser processing stable.
Choosing Compression Quality
Choose Low, Medium, or High based on your quality needs. For text-heavy PDFs, keep "text searchable" enabled. For scanned PDFs, turning it off usually gives better reduction.
Compressing PDF
Start compression and monitor progress live. You can cancel at any time if the file is taking too long.
Viewing Results
Compare original size, output size, and percentage change before downloading.
Downloading Compressed PDF
Download instantly. If the output is not smaller, the tool labels it as processed instead of compressed.
Pro Tip: Need to submit under a strict size cap (for example 25MB)? Start with Medium + scanned mode, then test readability. If text quality drops too much, retry with searchable mode enabled.
Frequently Asked Questions
Is this tool free?
Yes, this PDF compressor is completely free to use with no signup required. There are no usage limits, no hidden fees, and no account creation needed. The tool works entirely in your browser, ensuring fast performance and complete privacy. All compression happens locally—no data is sent to servers.
Can I compress a PDF for email (25MB limit)?
Yes. Upload your PDF and choose a compression level. For scanned/image PDFs, Medium or Low usually reduces size the most. If your PDF is mostly text, enable “Keep text searchable” to avoid rasterizing pages.
Does it work on mobile?
Yes, this PDF compressor is fully responsive and works on all devices, including smartphones and tablets. The interface adapts to smaller screens, and all features are available on mobile browsers. Perfect for compressing PDFs on the go.
Are my files secure?
Yes, your files are completely secure. All PDF processing happens locally in your browser—no files are uploaded to any server. Your PDFs never leave your device, ensuring complete privacy and security. The tool uses client-side JavaScript libraries to process PDFs entirely on your computer.
How much can PDFs be compressed?
Compression results vary depending on the PDF content. PDFs with many images typically compress better (30-70% reduction), while text-only PDFs may see minimal compression (5-15% reduction). The compression quality setting (Low, Medium, High) affects the balance between file size and quality.
Will the compressed PDF stay searchable/selectable?
If you enable “Keep text searchable”, we try to optimize the PDF without turning pages into images. If you turn it off, pages may be rasterized to images for stronger compression on scanned PDFs, which can remove selectable text.
Will compression affect PDF quality?
Compression may slightly reduce image quality within the PDF, especially with the 'Low' quality setting. The 'High' quality setting maintains better image quality while still reducing file size. Text and vector graphics are generally unaffected by compression.
What file size limits apply?
PDFs up to 50MB and 100 pages are supported. We limit size and page count so the tool stays stable in your browser. For larger or longer documents, split the PDF first, then compress each part.
Limitations & Tips
File and Page Limits
PDFs up to 50MB and 100 pages are supported. We limit these so the tool stays stable in your browser. For larger or longer documents, use our split PDF tool first, then compress each part.
Compression Results
Results vary by content. Image-heavy PDFs often shrink significantly, while text-first PDFs may change only slightly.
Image Quality
Lower quality settings create smaller files but can reduce image clarity. Use High for print-sensitive documents.
Security Handling
Processing stays local in your browser. Your PDF is never uploaded or stored on our servers.
Best Practices
For best results, test one representative file first, then reuse the same settings for similar documents. For full workflows, combine with Merge PDF, Split PDF, and other PDF tools.