Compress PDF — reduce to 100KB, 200KB, 500KB, 1MB, 2MB
Compress PDF online for free. Choose target size: 100KB, 200KB, 500KB, 1MB or 2MB — or use a quality slider. Reduce PDF file size in your browser, no upload, no account.
What does this tool do?
Large PDF files can be difficult to share via email or upload to web forms. Our PDF compressor intelligently reduces file size while maintaining the best possible visual quality. Get smaller PDFs in just a few clicks.
Our compression algorithm targets images, fonts, and metadata within the PDF to achieve maximum size reduction. Typical compression rates range from 20% to 80%, depending on the content of your document.
The compressed PDF retains all text, images, and formatting — it simply removes redundant data and optimizes the internal structure. Perfect for archiving, emailing, or uploading large reports.
Reduce PDF to a specific target size
Need a PDF under 100KB for a job application portal? Or under 1MB for an email attachment limit? Use the Target size dropdown above — the tool will iteratively reduce quality and resolution until your PDF fits. Common targets:
100KB — old government forms, strict portals
200KB — visa applications, university uploads
500KB — job boards, smaller portals
1MB — most email attachments, generic portals
2MB — generous portals, large attachments
5MB — content-heavy documents
How to use — 3 simple steps
1
Upload your PDF
Click or drag your PDF into the upload area. Any PDF file is accepted.
2
Select compression level
Choose between low, medium, or high compression. Higher compression means smaller file size.
3
Download compressed PDF
See the size reduction and download your optimized PDF immediately.
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100% Private — No Upload
Your files never leave your device. Everything runs directly in your browser using JavaScript — no server, no cloud, no data collection. Your documents stay private.
Frequently Asked Questions
Depending on the content, you can typically reduce PDF size by 20% to 80%. PDFs with many images see the highest compression.
Yes, absolutely. Text quality is not affected by compression. Only image resolution is slightly adjusted at high compression levels.
No maximum file size. You can compress PDFs of any size using PDFInOne.
Currently, files are processed one at a time for best results. You can compress multiple files sequentially.
Yes — PDFInOne is a completely free alternative to iLovePDF, Smallpdf, PDF24, and Adobe Acrobat online. Unlike those services, PDFInOne processes everything locally in your browser: no file uploads, no account required, no file size limits, and no watermarks.