Compress images
Reduce your image size with no visible loss, 100% local.
100% local processing: no upload to a server. Your files stay on your device.
1
Drop your files
Drop one or more files.
2
Choose a setting
Adjust options (format, quality, ratio…).
3
Download
Download the result, with the localoptim_ prefix automatically.
Drag and drop here
Drag and drop here, or use the button. You can also drop directly onto the list to reorder.
100% local processing: no upload to a server. Your files stay on your device.
Generator
Set the options, then start the generation.
100% local processing: no upload to a server. Your files stay on your device.
Files
You can reorder by drag and drop.
Preview
Preparing
Downloads
Frequently asked questions
Choose a format (WebP/JPG/PNG) and adjust quality. WebP often offers the best size/quality balance.
No. Everything is processed locally in your browser: privacy-first, zero upload.
WebP greatly reduces size while keeping good quality—ideal for the web (fast pages, SEO).
For most web uses, 75–85% is a good balance. Increase it if you see artifacts.
PNG for logos/text/transparent backgrounds. JPG for photos. WebP is often the best general choice.
Yes: no account, no personal data collection, no server storage.
Very large images require more CPU/RAM. Close other tabs to speed it up.
Settings
Pick a simple goal: Web (balanced), Email (light), WhatsApp (very compressed).
Selects the output format. WebP/AVIF are great for the web; JPEG for photos; PNG for transparency.
Higher = better quality, heavier file.
Help