Read the guide
HEIC vs JPEG: choosing an original and a sharing copy
Understand HEIC, HEIF and JPEG, compare a measured conversion example, and choose a sharing copy without discarding the original photo.
Image Converter
Convert images between JPG, PNG, WebP, AVIF, and ICO, including HEIC or HEIF photos to JPG. JPG, PNG, WebP, and AVIF keep the decoded image dimensions. ICO downloads as a ZIP of icon sizes.
Local files are converted in your browser. Load From URL may use a server fetch.
Your images
JPG, PNG, WebP, AVIF, HEIC, GIF, BMP, or ICO. Up to 20 images, 50 MB each (HEIC up to 30 MB). Ctrl+V pastes.
Settings
Convert to
Preview
Your preview will appear here
- Choose or drop images on the left
- Check the settings
- Compare, then download
All images
| File | Size | Change | Actions |
|---|
How to use the Image Converter
- Add up to 20 images: choose them, drop them on the box, or paste one. HEIC photos from an iPhone go in as they are.
- Pick the format under Convert to: WebP, AVIF, PNG, JPG, or ICO.
- Tick Lossless where available to preserve the decoded 8-bit pixels without further lossy compression. PNG is lossless; ICO sizes may be resized before lossless encoding.
- For JPG, choose the color that fills transparent areas.
- Download each file, or all of them as a ZIP. An ICO download is already a ZIP of the icon sizes.
How it works
The converter decodes the image to pixels, encodes those pixels in the chosen format, and checks the result's format signature before download.
- PNG, GIF, BMP, ICO and lossless WebP sources use lossless WebP or AVIF output by default. Lossless encoding preserves the decoded pixels; it cannot restore detail lost in the original or during decoding.
- Photos use high-quality lossy settings by default: WebP quality 90, AVIF quality 85 and JPG quality 95. AVIF and JPG use full color resolution (4:4:4). Fine detail and gradients can still change.
- JPG, PNG, WebP and AVIF keep the decoded width and height. Rotation tags are applied before output.
- ICO downloads as a ZIP of 16, 32, 48, 64, 128 and 256 px icons. Sizes larger than the image are omitted. An image is resized to each size and fitted inside a square with transparent padding where needed.
- HEIC decoding uses libheif compiled to WebAssembly. Only the main image is converted, at up to 30 MB per HEIC file. The output pipeline uses 8 bits per channel.
- PNG, WebP, AVIF and ICO support transparency. JPG replaces transparent areas with your chosen fill color. The converter copies an available color profile; check appearance in the software where you will use the result.
Images selected from your device, pasted or dropped into the tool are processed in your browser. From URL may retrieve a public image through Utilza's server when direct loading is blocked. See the privacy policy for the request path, and avoid URLs containing credentials or tokens.
Examples
The sample photo is a 163 KB JPG (1600 × 1067 px):
- To WebP: 134.6 KB, 1600 × 1067.
- To AVIF: 138.7 KB, 1600 × 1067.
- To PNG: 1.29 MB. PNG stores every pixel without loss, so photos get much bigger.
- To ICO: a ZIP of six icons, 16, 32, 48, 64, 128, and 256 px, because the photo is larger than all of them.
A 3.8 KB PNG logo with a transparent background becomes a 2.2 KB lossless WebP, pixel for pixel the same.
Which format should I convert to?
| Format | Best for | Transparency | Lossless mode |
|---|---|---|---|
| JPG | Photos that must open anywhere | No | No |
| PNG | Screenshots, logos, graphics | Yes | Always |
| WebP | Photos and graphics on websites | Yes | Yes |
| AVIF | Web photos where compression and compatibility suit the task | Yes | Yes |
| ICO | Favicons and app icons | Yes | Always |
For control over file size and quality, use the Image Compressor. Conversion here also uses lossy photo settings by default. Choose Lossless where available and compare fine detail and gradients before replacing an original.
For a web page, first choose image dimensions and compression for a website; changing the format alone may leave an oversized image.
Limitations
- HEIC and HEIF files can be up to 30 MB each. Only the main picture is converted, without depth maps or extra frames.
- For SVG files, use SVG to PNG, because an SVG has no fixed pixel size.
- Animated GIF and WebP files keep only their first frame.
- 16-bit PNG files and 10-bit HEIC photos are saved with 8 bits per channel, the most WebP, AVIF, JPG, and ICO hold here.
- An ICO file cannot store a side longer than 256 px. Larger sizes are not created, and a small image is not enlarged.
Before sharing a photo that may contain location data, remove photo location metadata and inspect the final file. Conversion is not a guarantee that every metadata field has been removed.
Convert HEIC or HEIF photos to JPG
Select the original .heic file through Files or Browse, then choose JPG under Convert to. Download the converted file and open it in the app that rejected the HEIC original. If your phone refuses to read the file, make sure it has downloaded from cloud storage and select it again through Files rather than the gallery.
HEIC input is limited to 30 MB per file and 20 files per batch. Only the main picture is converted; depth maps, extra frames and higher bit depth are not preserved. Output uses 8 bits per channel. JPG output is lossy and does not support transparency. Keep the HEIC original for future editing.
For a comparison of the original and a sharing copy, read HEIC vs JPEG.
Read the guide
Open iPhone HEIC photos on a Windows PC
Choose between Windows photo extensions and a browser conversion. Check the JPG, keep your HEIC original, and prepare a copy for sharing.
Frequently asked questions
Is the image really converted or just renamed?
Really converted. The pixels are encoded again in the new format, and the first bytes of the result are checked against the format's signature (for example RIFF...WEBP for WebP) before you can download it.
Will converting lose quality?
It depends on the output and settings. Photos use high-quality lossy encoding by default, so detail can change. Lossless output preserves the decoded 8-bit pixels without further lossy compression, but does not recover lost detail, higher bit depth or extra frames. ICO output resizes the image; JPG also replaces transparency with a fill color. Keep the original and compare the result.
Why did my JPG get bigger when I converted it?
The original JPG was saved at a lower quality than the high setting used here, or you chose PNG, which stores photos without loss. To shrink files, use the Image Compressor.
Can I convert HEIC photos from my iPhone?
Yes, when the browser can run the WebAssembly decoder and the device has enough memory. Choose the original .heic file from Files or Browse, up to 30 MB each, then select JPG, PNG, WebP or AVIF. Only the main image is converted. Rotation is applied, an available color profile is copied and output uses 8 bits per channel.
What is inside the ICO download?
A ZIP of single-size ICO files: 16, 32, 48, 64, 128, and 256 px, skipping any size larger than the image. Other formats still download as one file each.
Are my images uploaded to Utilza?
Files selected from your device, pasted or dropped into the tool are converted in your browser. From URL requests a public image directly where possible and may use Utilza's server if browser restrictions block it. The privacy policy explains that separate request path. Do not load URLs containing credentials or tokens.
Related tools
Often used together with Image Converter.
Image to WebP
Converts JPG, PNG, GIF, and other images to WebP without visible quality loss.
Image to AVIF
Converts JPG, PNG, WebP, and GIF images to AVIF at full color resolution.
Image Compressor
Shrinks JPG, PNG, WebP, and AVIF files with a quality slider and a before/after view.