UFOZoo

Image Converter — Convert HEIC, JPG, PNG, WebP, AVIF Online

Convert images between HEIC, JPG, PNG, WebP, AVIF, and ICO formats. Adjust quality and batch convert. 100% browser-based.

Features

  • ✓Convert images between HEIC, JPG, PNG, WebP, AVIF, and ICO formats instantly
  • ✓HEIC/HEIF input support — convert iPhone photos directly in browser
  • ✓AVIF output support — next-gen format with best compression ratio
  • ✓Adjustable quality slider for JPEG, WebP and AVIF output (0–100%)
  • ✓Quality presets for quick optimization: Smallest, Web, Balanced, High
  • ✓Multi-size ICO output — generates 16×16 to 256×256 in one file
  • ✓Batch processing — open and convert multiple images at once
  • ✓Save all converted images as a ZIP archive
  • ✓Paste from clipboard (Ctrl+V) for instant conversion
  • ✓All conversion happens in your browser — no server uploads
  • ✓Supports input: HEIC, HEIF, JPG, PNG, WebP, GIF, BMP, SVG
  • ✓100% free with no file size limits

How to Use

  1. 1Open images by clicking the drop area, dragging files, or pasting from clipboard (Ctrl+V).
  2. 2Select the target output format from the sidebar — JPG, PNG, WebP, AVIF, or ICO.
  3. 3Adjust quality using the slider or choose a preset (Smallest, Web, Balanced, High) for quick optimization.
  4. 4Enable Multi-size ICO if converting to ICO format for maximum favicon compatibility.
  5. 5Images convert automatically on opening — review the results in the list.
  6. 6Save individual images, or click Save All to save everything as a ZIP archive.
  7. 7How to convert HEIC photos from iPhone to JPG: open your HEIC files from iPhone, select JPG as the target format, adjust quality to 85-90%, and save individually or as a ZIP batch. All processing happens locally with no upload needed.
  8. 8How to generate a multi-size favicon ICO file: open a square PNG logo, select ICO as output format, enable the Multi-size ICO option. The tool generates a single .ico file containing sizes from 16×16 to 256×256 for maximum favicon compatibility across browsers and devices.

Frequently Asked Questions

Which image formats are supported for input?

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The tool accepts JPG/JPEG, PNG, WebP, GIF (first frame only), BMP, SVG, HEIC, and HEIF files as input. These are all formats that the browser can render. For output, you can choose between JPG, PNG, WebP, AVIF, and ICO.

What is multi-size ICO and when should I use it?

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Multi-size ICO generates a single .ico file containing multiple image sizes: 16×16, 32×32, 48×48, 64×64, 128×128, and 256×256. This is the standard format for favicon files, as different contexts (browser tabs, taskbar, start menu) use different sizes. Enable 'Multi-size ICO' when converting to ICO for maximum compatibility.

Does image quality affect file size?

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Yes. For JPEG and WebP formats, lower quality settings produce smaller file sizes but may introduce compression artifacts. PNG is lossless, so quality does not apply. We recommend 80–90% quality for a good balance of size and visual fidelity.

Is transparency preserved?

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Transparency is preserved when converting to PNG or WebP (both support alpha channels). However, if you convert to JPEG, any transparent areas will be filled with white, as JPEG does not support transparency. ICO output preserves PNG-based transparency.

Are there any file size limits?

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Since all processing happens in your browser, the practical limit depends on your device's available memory. Most images under 50MB work fine. Very large images (100MB+) may cause performance issues on lower-end devices.

Can I convert SVG to PNG or JPEG?

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Yes. SVG files are accepted as input and will be rasterized (converted to pixels) during the conversion process. The output will be a standard raster format. Note that SVG resolution depends on the render size used during conversion.

Does the tool preserve EXIF data?

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No. EXIF metadata (camera settings, GPS location, date taken) is not preserved during conversion. The output image contains only the pixel data and basic color information. If EXIF preservation is critical, consider using a dedicated metadata tool.

Is my image uploaded to a server?

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No. All image conversion happens entirely in your browser using the HTML5 Canvas API. Your image is never uploaded, stored, or transmitted anywhere. You can even use this tool offline after the page loads.

What is AVIF and should I use it?

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AVIF (AV1 Image File Format) is a next-generation image format based on the AV1 video codec. It offers even better compression than WebP — typically 20-30% smaller files at the same quality. However, browser support is still growing. Use AVIF for modern websites where file size is critical.

Can I convert images between CMYK and RGB?

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No. This tool does not perform color space conversion. The output image uses the sRGB color space, which is the standard for web and most digital uses. For professional print workflows requiring CMYK, use dedicated graphics software like Photoshop or GIMP.

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