File Compressor
Compress any files into a ZIP archive — fully in your browser. No uploads, no sign-up.
Drag & drop files here
Any file type — PDF, images, documents, code files…
How it works
Drag & drop or browse to add any files — PDFs, images, documents, code, and more.
Pick Balanced for most files. Use Store for images & videos — they don't compress well.
Your ZIP is created entirely in the browser. Nothing is uploaded to any server.
What is File Compressor?
A file compressor takes one or more files and packages them into a compressed ZIP archive, reducing total file size and making it easier to share multiple files as a single attachment. ZIP is the most universally supported compression format, readable on Windows, macOS, Linux, Android, and iOS without any additional software.
This tool performs all compression entirely in your browser using the Web APIs available in modern browsers. You select your files, choose a compression level, and download the resulting ZIP — your files never leave your device. There are no file size limits imposed by server quotas, no upload waiting times, and no privacy concerns about your documents being stored on third-party servers.
File compression is useful in dozens of everyday scenarios. Sending multiple files by email is much easier as a single ZIP attachment. Sharing a folder of images, documents, or code files over messaging apps or cloud storage becomes a one-step process. Archiving old project files before deleting them keeps them accessible without cluttering your drive. Compressing files before uploading to a slow connection significantly reduces transfer time. While this tool focuses on ZIP archiving, the compression algorithm works best on text-based files like documents, spreadsheets, HTML, and code files. Binary files like JPEGs and MP4s are already compressed and see minimal size reduction from ZIP compression.
How to Use File Compressor
- Select your files
Click to browse or drag and drop any files you want to compress. You can select multiple files at once.
- Choose compression level
Select from no compression (store only), default compression, or maximum compression depending on your speed vs size preference.
- Build the archive
Click Compress to package all selected files into a ZIP archive. Processing happens entirely in your browser.
- Download your ZIP
Once complete, click Download to save the ZIP file to your device. The original files are not affected.
Key Benefits
Files are compressed locally using browser APIs. Nothing is uploaded to any server — your documents stay on your device.
Without server-side upload restrictions, you can compress large files and batches limited only by your device's available memory.
Bundle any number of files into a single ZIP in one step, making it simple to share collections via email or messaging.
ZIP archives open on every major operating system without any additional software — Windows, macOS, Linux, iOS, and Android.
Frequently Asked Questions
No. All ZIP creation happens in your browser using JavaScript. Your files are never uploaded, transmitted, or stored anywhere outside your device.
Text-based files compress best: documents (DOCX, PDF, TXT), spreadsheets (XLSX, CSV), code files (JS, HTML, CSS, JSON), and log files. Binary files like JPEG images and MP4 videos are already compressed and see minimal size reduction.
There is no server-imposed limit. The practical limit is your browser's available memory. Most modern devices handle files totalling several gigabytes without issues.
ZIP password protection requires additional processing that is not currently supported. For sensitive files, consider encrypting them before compression using a dedicated encryption tool.