Why does this produce WebP instead of HEIC?

Web browsers have no built-in API to encode HEIC/HEIF files. HEIC is a container format tied to proprietary codecs (HEVC/H.265) that require licensing. WebP is the closest browser-native alternative, offering similar compression efficiency and full cross-browser support — without any server-side processing.

Are my images uploaded to a server?

No. All conversion runs inside your browser using the HTML5 Canvas API. Your image never leaves your device.

Will the WebP file open on iPhone or Mac?

Yes. iOS 14+ and macOS 11+ (Big Sur and later) support WebP natively. Most modern apps including Safari, Chrome, and Photos can display WebP files.

What quality setting should I use?

Quality 75–85 is the sweet spot for most photos — visually near-lossless at significantly smaller file sizes than JPG. For high-detail or text-heavy images, 90+ is safer. For thumbnails or previews, 60–70 is acceptable.

Why is the output sometimes larger than the original?

Very low-quality JPGs that are already heavily compressed, or very high quality settings, can occasionally produce a larger WebP. Try lowering the quality slider to achieve a smaller output.

Is there a file size limit?

The limit is your browser's available memory. Very large images over 30 megapixels may be slow to process on low-end devices.

Can I get a true HEIC file from the browser?

Not without a server-side codec or a native app. If you specifically need a .heic file for Apple ecosystem workflows, use the Photos app on macOS or iOS, or a dedicated desktop tool like Preview on Mac.

JPG to HEIC Converter

Upload a JPG image and convert it to WebP — the best browser-available alternative to HEIC — with a quality slider and file size comparison. All processing happens locally.

Browser HEIC Encoding — What You Need to Know

Browsers cannot encode HEIC files natively. This tool converts your JPG to WebP — the closest browser-native alternative, with similar efficiency and universal modern browser support.

Upload Image

Click or drag an image here

JPG and JPEG files supported

WebP Quality

1 — smallest 100 — best

WebP and HEIC are different formats. Renaming this .webp file to .heic will not create a valid HEIC file.

Preview (WebP output)

Upload a JPG to see the WebP preview

Adjust quality to compare sizes in real time

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Summary

HEIC (High Efficiency Image Container) encoding is not natively supported in web browsers — there is no browser API that can write HEIC files from JavaScript. This tool converts your JPG or JPEG images to WebP, which is the closest browser-native equivalent: it uses a modern codec, achieves similar or better compression than HEIC, and is widely supported across all modern browsers, operating systems, and devices. All processing happens entirely inside your browser. No files are ever sent to any server.

How it works

Select or drag a JPG or JPEG image onto the upload area.
Adjust the WebP quality slider (1–100, default 82) to your preference.
The preview and output file size update instantly.
Review the before/after file size comparison.
Click "Download WebP" to save the converted image.

Use cases

Shrink large JPG photos for faster web page loads.
Convert product images to a modern high-efficiency format.
Reduce image weight for Core Web Vitals improvement.
Get the smallest possible file size from a JPG without visible quality loss.
Process images privately without uploading to a third-party service.
Prepare images for Apple devices that display WebP natively.
Optimize hero images and banners without losing visual quality.

Frequently Asked Questions

Last updated: 2026-05-28 · Reviewed by Nham Vu