Image Format Converter — Help & Documentation

A browser-based image converter supporting HEIC, WebP, AVIF, PNG, JPG, BMP, GIF, and TIFF. Features a quality slider for output control. All processing happens locally.

1. Upload an image using the drop zone 2. See the preview with file details 3. Select an output format 4. Adjust quality (0-100%) 5. Click "Convert Image" 6. Download the result

HEIC/HEIF — iPhone/Apple format. High quality, small files.
WebP — Google format. Great compression, wide browser support.
AVIF — Newest format. Best compression. Growing support.
PNG — Lossless. Best for graphics, logos, screenshots.
JPG/JPEG — Universal. Best for photos. Lossy compression.
BMP — Uncompressed. Large files. Legacy format.
GIF — Limited to 256 colors. Supports animation.
TIFF — Professional photography. Lossless. Large files.

The quality slider (0-100%) affects output file size and visual quality. 100% = maximum quality (largest file), 0% = maximum compression (smallest file). Recommended: 80% for photos, 90%+ for important images, 60% for web thumbnails.

• Convert HEIC to JPG or WebP for easy sharing
• Use PNG for screenshots and graphics with transparency
• WebP offers the best size/quality ratio for web use
• AVIF is even smaller than WebP but has less browser support
• The quality slider doesn't affect PNG (always lossless)

HEIC slow: HEIC decoding runs in JavaScript — it's slower than native formats. Be patient with large files.
AVIF not working: Some older browsers don't support AVIF encoding. Try Chrome or Firefox.
Output too large: Lower the quality slider. For JPG, 70-80% gives good results.