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Important: Lossy compression permanently removes data to reduce file size. Always thoroughly test compressed files in your development and staging environments before using in production to ensure functionality remains intact.
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Install L0ss Client
Install this app for offline access and faster performance!
How to install:
- Chrome/Edge (Mac/Windows/Linux): Click the "Install App" button in the header, or look for the install icon (⊕) in the address bar
- Chrome/Edge (Android): Tap the "Add to Home Screen" banner, or tap ⋮ menu → "Install app"
- Safari (iPhone/iPad): Tap the Share button (📤) → scroll down → "Add to Home Screen"
- Safari (Mac): File menu → "Add to Dock" (macOS Sonoma+)
- Firefox (Android): Tap ⋮ menu → "Install" or "Add to Home Screen"
- Firefox (Desktop): Limited PWA support. For best experience, use Chrome or Edge. You can still bookmark the site for quick access.
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Drop files here or click to browse
Supports: JSON, CSV, JavaScript, HTML, CSS, SQL, XML, YAML, SVG, Markdown, Text
Selected Files (0)
Compression Preview
Minimal
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Safe optimizations only
Moderate
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Balanced approach
Aggressive
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Maximum compression
💡 Click a level above to select it and see detailed optimizations
Changes with Moderate:
⚙️ Advanced Options
💡 Changes will automatically update the preview. Adjust options to see their impact on compression.
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Multiple files selected
Select a compression level below. All files will be compressed with the same settings.
Minimal
Safe optimizations only
10-30% reduction
Moderate
Balanced approach
30-60% reduction
Aggressive
Maximum compression
60-90% reduction
Selected: Moderate
Compression Results
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Original Size
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Compressed Size
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Reduction
Recovery Manifest: This JSON file contains all operations performed and can help you understand what was changed.
⏳ Processing files...