WebP and AVIF are currently the best formats for web use. WebP offers excellent compression with broad browser support (97%+), while AVIF provides even smaller file sizes at comparable quality but has slightly less widespread support. For photographs, use WebP or AVIF. For images requiring perfect transparency and sharp edges (like logos), PNG remains a solid choice. JPEG is best only when you need maximum compatibility with older systems.

All conversion happens entirely in your browser using the HTML5 Canvas API. Your images are never uploaded to any server — they stay on your device. The tool reads each image, renders it onto an off-screen canvas, and exports it in your chosen format. This ensures complete privacy and security. No data ever leaves your computer.

For JPEG, a quality of 80-85 offers an excellent balance between file size and visual quality for web photos. For WebP, 75-85 is recommended — WebP achieves similar perceived quality to JPEG at about 25-35% smaller file sizes. For AVIF, 65-75 typically produces results comparable to JPEG at quality 85 while being significantly smaller. Always preview your converted images to find the sweet spot for your specific use case.

Converting to PNG from another lossless source preserves quality perfectly. Converting to JPEG, WebP, or AVIF (lossy modes) will involve some quality reduction, as these are lossy formats. The degree of quality loss depends on your quality setting. For best results when converting between lossy formats, use a high quality setting (85+). Converting from a lossy format to PNG will not restore lost quality. It's generally recommended to keep original high-quality source files and convert copies for distribution.

This tool supports batch conversion of up to 20 images at a time, with each file up to 25MB. There is no daily limit — you can use the tool as many times as you need. After converting and downloading, simply clear the list and upload a new batch. For very large batches, consider splitting them into groups of 20 for optimal performance.

AVIF (AV1 Image File Format) offers superior compression efficiency — typically 30-50% smaller than JPEG at equivalent quality, and about 20-30% smaller than WebP. It supports both lossy and lossless compression, HDR, wide color gamut, and transparency (alpha channel). The main trade-off is encoding speed (AVIF is slower to encode) and slightly lower browser support compared to WebP. As of 2024, AVIF is supported in Chrome, Firefox, and Safari, covering over 93% of users globally.

Yes, you can upload SVG and GIF files for conversion. For SVG files, the tool rasterizes them at their natural size (or a default size if unspecified). For animated GIFs, only the first frame will be converted to the target format. If you need to preserve animation, consider using a dedicated GIF optimization tool instead.

Not necessarily. PNG is lossless and supports transparency, making it ideal for graphics, logos, screenshots, and images with text or sharp edges. However, PNG files are typically 3-10x larger than JPEG for photographic content. For photos and complex images without transparency needs, JPEG (or better yet, WebP/AVIF) is usually the better choice because the file size reduction far outweighs the minimal perceptual quality loss. Choose the format based on your specific use case, not a blanket preference.