PDF Merge
Combine multiple PDF files into a single document instantly in your browser — drag-and-drop, reorder pages, and download the merged PDF. Free, no upload to any server, privacy-first.
Browser-first · No sign-up
PDF Compressor Free Online
Compress PDF files with drag-and-drop, compression levels, and instant download. Files stay in your browser for privacy.
No uploads. Everything runs locally in your browser.
Upload PDF
Drag & drop or click to upload. PDF only. Files are processed locally.
No file selected
Accepted: PDF · Max size depends on your device memory.
Compression settings
Balanced size and quality
Disable to favor smaller size for image-heavy PDFs.
Actions
Result
No file loaded
Upload and compress a PDF to see the result summary here.
Your files never leave this browser. Close the tab to clear temporary URLs.
What is this tool
This PDF Compressor reduces file size for faster sharing while keeping everything local to your browser. Upload or drag a PDF, pick a compression level (Low, Medium, High), and download the smaller file with a clear size comparison. No servers or accounts are involved, so sensitive documents remain private.
Compression options let you prioritize quality or size. Low keeps the best visual fidelity, Medium balances both, and High aims for smaller output. A “Keep image quality” toggle helps maintain sharpness for scans and slides. After processing, you’ll see the original size, compressed size, and percent reduction.
Use this when email limits block large PDFs, portals reject big uploads, or you want faster downloads on mobile. The tool surfaces trust cues and a clean flow so beginners and frequent users can compress confidently.
Processed locally · No upload · Your files stay private.
How to use PDF Compressor Free Online
- Upload or drag a PDF into the drop area.
- Choose a compression level and optional quality setting.
- Click Compress and wait for the download link.
- Review the size reduction and download the compressed PDF.
Key features of PDF Compressor Free Online
- Drag-and-drop or click to upload PDF files
- Compression levels: Low (quality), Medium (balanced), High (smaller)
- File info with name, original size, and reduction summary
- Copy and download outputs with clear success/error states
- Client-side processing—no server uploads, privacy safe
PDF Compressor Free Online — key benefits
- Completely free with no signup or registration required.
- Runs entirely in your browser — your data is never uploaded.
- Works on desktop, tablet, and mobile devices.
- Instant results with no waiting or processing queues.
- Part of the ToolCircuit suite of free online pdf tools tools.
Use cases
- Reduce PDFs for email attachments or chat uploads that impose size limits.
- Optimize brochures, slide decks, or proposals before sharing links.
- Shrink scanned receipts or forms for faster portal submissions.
- Prepare PDF handouts for mobile audiences to speed up downloads.
- Balance quality vs size when publishing resources to your site or LMS.
Popular ways to use this tool
- Compress a PDF before sending it via email or Slack.
- Pick Medium level for everyday sharing; switch to High for strict limits.
- Keep image quality on for scanned documents that must stay legible.
- Compare original vs compressed sizes to confirm savings before download.
- Reset and compress multiple PDFs in a row for batch prep.
FAQ
What does a PDF compressor do?
It reduces PDF file size so it is faster to upload, email, or share while keeping the document readable.
Is my PDF uploaded to a server?
No. Processing happens locally in your browser for privacy.
What compression levels are available?
Low (best quality), Medium (balanced), and High (smaller size).
Can I keep image quality?
Yes. Enable the Keep image quality toggle for more conservative compression.
How do I download the compressed PDF?
After compressing, click the download button to save the new PDF.
Does this work on mobile?
Yes. The layout and buttons are mobile-friendly.