File Compressor
Zip files and folders for easy sharing and storage
Zip files and folders securely in your browser
Multiple Files • Max 50MB
Session
Queue Statistics
Related Tools
What is Free Online File Compressor?
Our File Compressor is a simple, browser-based tool that lets you shrink large files and folders by packing them into ZIP archives. It's the perfect way to bundle multiple documents for email, save storage space, or organize your data for sharing — all without installing any software. Everything happens locally in your browser, so your files are never uploaded to a server.
Key Features & Benefits
Keep Folder Structures
When you upload a folder, our compressor preserves the entire internal directory structure so your files stay organized exactly as they were.
Runs in Your Browser
No installation required. This tool works entirely on your device using your web browser, which means your files stay private and secure.
Easy Queue Management
Add or remove individual files from your list before compressing. You have full control over what goes into your final bundle.
See Your Savings
The tool calculates exactly how much space you've saved after compression, giving you clear feedback on the final file size.
How to Use the Free Online File Compressor
Add your files or folders
Drag and drop your files directly into the upload area. You can also click 'Add Files' or 'Add Folder' to select them from your computer's storage.
Review your list
Check the list of staged files to make sure you have everything you need. The tool automatically shows the total size of your selection.
Start the compression
Click 'Compress Files'. The tool uses built-in browser technology to pack your files into a ZIP archive instantly, right on your machine.
Download your ZIP
Once finished, click the download button to save your new, smaller ZIP file. It's ready to be sent or stored immediately.
Practical Use Cases
Send large email attachments
Shrink bulky PDF reports or image sets to fit within email size limits without losing any data.
Share project files
Bundle hundreds of small source code or asset files into a single, easy-to-download package for colleagues or clients.
Organize client deliverables
Group design mockups, brand assets, and documents into one tidy ZIP file for professional project delivery.
Clean up disk space
Archive old logs, documents, or personal files you don't use often to reclaim space on your hard drive.
FAQs
What is a file compressor and how does it work?
A file compressor reduces the size of files and folders by creating ZIP archives using compression algorithms. Our tool compresses multiple files into a single ZIP file, making it easier to share and store large amounts of data while reducing storage space and transfer time.
How do I compress files using this tool?
Simply select individual files or an entire folder using the buttons, or drag and drop files directly into the designated area. Then click the 'Compress Files' button to create your ZIP archive. The compressed file will download automatically when complete.
Is my data secure when using this compressor?
Yes, absolutely! All compression happens entirely in your browser using client-side JavaScript. Your files are never uploaded to any server, ensuring complete privacy and security. Your data never leaves your device.
Can I compress folders with multiple subfolders?
Yes! When you select a folder using the 'Select Folder' button, the tool will compress all files and subfolders while preserving the complete directory structure. The folder hierarchy is maintained in the resulting ZIP archive.
What file types can I compress?
You can compress any file type including documents (PDF, DOCX), images (JPG, PNG), videos (MP4), code files, and more. The compression algorithm works with all file formats, though already-compressed formats like JPG or MP4 may not reduce much in size.
Is there a file size limit for compression?
While there's no strict limit imposed by the tool, very large files may be limited by your browser's memory capacity. For optimal performance, we recommend compressing files totaling less than 2GB at once. For larger archives, consider splitting them into smaller groups.
How much space can I save with compression?
The compression ratio depends on file types. Text files, documents, and source code can compress by 50-80%, while already-compressed formats like JPEG images or MP4 videos may only reduce by 5-10%. The tool shows you the exact space saved after compression.
Can I extract the compressed files later?
Yes! ZIP files created by this tool are standard ZIP archives that can be extracted using any ZIP utility on Windows, Mac, Linux, or mobile devices. You can also use our ZIP Extractor tool to extract files directly in your browser without installing any software.