How to Convert HEIC to WebP for Smaller Web Images
If you are building a website or blog and want to use iPhone photos, you face a two-step problem: HEIC is not supported by any browser except Safari, and JPG files are larger than they need to be. WebP solves both issues. It is supported by all modern browsers and produces files 25-34% smaller than JPG at the same visual quality.
Converting HEIC directly to WebP skips the JPG middleman entirely, giving you web-optimized images in a single step.
Step-by-Step Instructions
- Open the HEIC to WebP converter
Navigate to imageconvert.co/heic-to-webp in any web browser. No installation, signup, or plugin required.
- Add your HEIC photos
Drag and drop your iPhone HEIC photos onto the page, or click to browse. Multiple files are supported for batch processing.
- Set the quality level
Use the quality slider to control the compression. 80% gives excellent results for most web use. Lower values produce smaller files with slightly more compression artifacts.
- Download your WebP files
Conversion runs instantly in your browser. Download individual files or grab everything as a ZIP. The file sizes will be noticeably smaller than equivalent JPGs.
Why WebP Is Ideal for Web-Bound iPhone Photos
HEIC and WebP share a similar philosophy: use modern compression to shrink file sizes. But HEIC was designed for device storage while WebP was designed specifically for the web. WebP files load faster than JPG, support transparency like PNG, and are understood by Chrome, Firefox, Safari, and Edge.
When you convert HEIC to WebP, you are essentially moving the image from a phone-optimized format to a web-optimized one. The visual quality stays high while file sizes drop to levels that make page speed tools happy.
Quality Settings for WebP Output
WebP supports both lossy and lossless compression. For photographs from an iPhone, lossy WebP at 75-85% quality produces images that are visually indistinguishable from the HEIC original while being compact enough for fast web delivery. Going below 70% can introduce noticeable softening in detailed areas.
If you are converting graphics, screenshots, or images where every pixel matters, consider converting to PNG instead. WebP lossless mode exists but produces files comparable in size to PNG, so there is no advantage for that use case.
WebP Browser Support in 2026
WebP is supported in all modern browsers as of 2026: Chrome, Firefox, Edge, Safari (16+), and Opera. Global support exceeds 97%. The only browsers that cannot display WebP are Internet Explorer (discontinued) and very old mobile browsers that represent a negligible share of traffic.
For maximum compatibility on older sites, you can serve WebP with a JPG fallback using the HTML picture element. But for any site built today, WebP-only is safe for essentially all visitors.
Privacy and Local Processing
Many web-based image converters require uploading your files to a server. This means your personal iPhone photos are transmitted over the internet and processed on someone else's machine. imageconvert.co takes a fundamentally different approach: the HEIC decoding and WebP encoding both run locally in your browser using WebAssembly. Your files never leave your device, eliminating privacy concerns entirely.
Frequently Asked Questions
Is WebP smaller than JPG for the same quality?
Yes. WebP lossy produces files 25-34% smaller than JPG at equivalent visual quality, according to Google's testing. The savings are especially noticeable for photographic content.
Can all browsers display WebP images?
All modern browsers support WebP, covering over 97% of global web traffic. Safari added support in version 16 in 2022. Only discontinued browsers like Internet Explorer cannot display WebP.
Should I convert HEIC to WebP or JPG?
Use WebP if the images are for a website or web application. Use JPG if you need maximum compatibility with older software, email clients, or non-web applications that may not support WebP yet.
Does converting HEIC to WebP lose quality?
Both HEIC and WebP lossy use lossy compression, so there is a minor quality change during conversion. At 80% or higher WebP quality, the difference from the HEIC original is not visible to the human eye.