Web PDF Optimizer and Merger: Compress and Combine PDFs Free
This tool compresses and merges PDF files directly in your browser. You can add up to 100 files, each up to 100 MB, without uploading anything to a server.
Click or drag PDF files here
Max 100 files • 100 MB each
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How to Use This Tool
- Click or drag your PDF files into the upload area. You can add up to 100 files, each up to 100 MB.
- Check “Optimize PDF” to reduce file size, “Merge All” to combine files into one, or check both to do both at once.
- Click “Process PDFs” and wait for your browser to finish.
- Download each file separately, or download all processed files together as a ZIP.
When You Need This
PDF files grow large quickly. A scanned document, a presentation, or a report with images can reach dozens of megabytes. Large files are slow to email and hard to share.
This tool reduces that size without sending your file to a server. No waiting for a remote service to process and return it.
Merging is useful when you collect documents from multiple people and need one combined file. Up to 100 separate files can become one in a single step.
Browser-Based Processing: What It Means
Your browser handles all the work. The tool uses your device’s memory and processing power, not a remote server.
Compression results depend on your browser and device. For most everyday documents, results are close to what a server-based tool produces. Files with many images compress more than text-only files.
Processing many large files at once takes more memory than your device may have. If your browser slows down or becomes unresponsive, reduce the number of files or pick smaller ones to process at a time.
Privacy: How This Tool Works
No file you add here is uploaded anywhere. Everything runs on your device.
Nothing is stored, shared, or sent to any server. Close the tab and every file is gone.
Frequently Asked Questions
Does this tool upload my PDF files to a server?
No. All processing happens in your browser. Your files stay on your device at all times.
How much can this tool compress a PDF?
Results vary by file. This tool uses browser-based compression, which works well for most everyday documents. The exact result depends on your file content and device.
Can I merge more than two PDF files at once?
Yes. You can add up to 100 files at once and combine them all into a single PDF in one step.
Can I optimize and merge files at the same time?
Yes. Check both options before clicking “Process PDFs” and the tool will do both together.
Is it safe to process private or confidential documents?
Yes. No file leaves your device. The tool runs entirely in your browser, so no one else can access your documents.