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Quick answers.

›Is my file sent to your server?

No. The compression is performed locally using your browser's internal engine, meaning the original file never leaves your computer.

›What is the difference between Gzip and Deflate?

Gzip is the standard format for web assets and includes a header with a checksum and filename. Deflate is the core compression algorithm used by Gzip but without the extra metadata, often used in raw data streams.

›Are there file size limits?

The limit depends on your device's available system memory. For very large files (over 1GB), the browser tab may become unresponsive during the process.

›Will this work on images and videos?

It will technically work, but you will not see much size reduction. Formats like JPG, MP4, and ZIP are already compressed, so running them through Gzip again adds more overhead than it saves.