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Free Online Image Converter
PNG, JPG, GIF, WebP, AVIF, HEIC converter, Extract Images from ZIP, Folders, DOCX, XLSX | Batch Convert Multiple Images | Free HEIC Converter
Convert images to any format quickly and easily. PNG, JPG, GIF, WebP, AVIF, HEIC convertng
Slimmage is a free online image converter that reduces file size without changing dimensions. Extract images from ZIP, folders, DOCX, XLSX files and convert them easily. Supports batch processing to convert multiple images at once. Free HEIC converter plus support for PNG, JPG, WebP, AVIF formats. All conversions are processed securely in your browser for complete privacy protection.
Key Features
- ✓Reduce file size without changing dimensions
- ✓Extract images from ZIP, folders, DOCX, XLSX files
- ✓Batch convert multiple images at once
- ✓Free iPhone HEIC converter
- ✓Secure browser-based image processing - privacy protected
Frequently Asked Questions
What is AVIF?
AVIF (AV1 Image File Format) is a modern image format based on the AV1 video codec. It provides 50% smaller file sizes than even WebP, with support for 10-bit color and HDR. While it's gaining attention as the next-generation web standard, it may not be supported by some older browsers.
What is a HEIC file?
HEIC (High Efficiency Image Container) is a high-efficiency image format used by Apple since iOS 11. It provides better quality than JPEG with 50% smaller file size, but may need conversion to JPG for compatibility with some devices or software.
How do I compare image formats?
PNG (lossless, transparency), JPEG (photos, small size), WebP (web-optimized, 25-35% savings), AVIF (best compression, 50% savings), HEIC (Apple ecosystem). Choose by purpose: WebP/AVIF for websites, JPEG for photo storage, PNG for logos/graphics.
How can I prevent quality loss?
Use PNG format for lossless compression. For JPEG, WebP, AVIF (lossy formats), set quality to 90%+ or maintain original resolution to minimize quality loss. We recommend keeping original copies of important images separately.
Which format is useful for what purpose?
Websites: WebP/AVIF (fast loading), Photo storage: JPEG (reasonable size), Logos/icons: PNG (transparent background), Print: PNG/TIFF (high quality), iPhone photos: HEIC (space saving), Email attachments: JPEG (compatibility). Choose the right format for optimal results.
Are JPG and JPEG the same?
Yes, JPG and JPEG are exactly the same format. Early Windows systems limited file extensions to 3 characters, so JPEG was shortened to JPG. Both extensions are now widely used with no functional differences.
What is SVG?
SVG (Scalable Vector Graphics) is a vector-based image format that maintains quality when scaled up. Perfect for logos, icons, and simple illustrations with very small file sizes. However, it's not suitable for complex photos, and Slimmage currently only supports raster image formats.
Is online image conversion safe?
Slimmage processes all images directly in your browser. Images are never uploaded to servers, ensuring complete privacy protection, and conversion is possible even without a network connection.