Delete unused files or old versions
Compress the file (ZIP, 7z, RAR)
Convert to a more efficient format (PDF/A, JPEG/WEBP, MP3/AAC, H.265)
Reduce image quality or resolution (resize, lower DPI)
Remove metadata (EXIF, comments, author info)
Strip unnecessary layers, thumbnails, or embedded previews
Flatten PDFs or reduce embedded fonts/images
Use “Save as” with compression options (for Office files)
For spreadsheets, remove formatting bloat and unused rows/columns
For videos, lower bitrate, resolution, or frame rate
For audio, use a higher compression codec or lower bitrate
Split large files into smaller chunks
Rebuild archives with better compression settings
Use cloud storage “optimize” or “compress” download options (if available)
Check for duplicate content and remove it before compressing