Convert HEIC to WebP Online
Convert iPhone HEIC photos to optimized WebP for the web. Free, in your browser, no file uploads.
.webp, .png, .jpg · up to 50 MB
Why use this converter
HEIC to WebP: the best of both worlds
iPhone photos ready for the web
Convert iOS's native format directly to WebP without intermediate steps or additional quality loss.
100% private
Your photos are processed in your browser with WebAssembly. Never uploaded to any server.
Core Web Vitals LCP
WebP is up to 60% lighter than JPEG. Directly improves LCP and your website's SEO ranking.
CMS compatible
WebP works natively in WordPress 5.8+, Shopify, Squarespace, Webflow, and all modern CMS platforms.
How it works
Three steps, no hassle
Upload your HEIC photo
Drag and drop or select your .heic or .heif file. iPhone photos transfer directly from Finder or via USB cable.
In-browser conversion
Your photo is decoded and converted to WebP using libheif compiled to WebAssembly. The entire process happens on your device.
Download optimized WebP
Get a WebP up to 60% lighter than the equivalent JPEG, ready to upload to WordPress, Shopify, or any CMS.
FAQ
Got questions?
HEIC (High Efficiency Image Container) is the default image format on iPhone and iPad since iOS 11 (September 2017). It is based on the HEVC (H.265) compression codec, the same one Apple uses for 4K video. At equivalent visual quality, HEIC files are approximately half the size of JPEG: a 4 MB JPEG photo is typically 2 MB in HEIC. The format is defined by the Moving Picture Experts Group (MPEG) in the ISO/IEC 23008-12 specification. The problem is that Windows, Android, most browsers, and many CMS platforms do not support it natively, requiring conversion before publishing to the web.
WebP, developed by Google in 2010 (based on the VP8 codec), produces files 25-34% smaller than JPEG at perceptually equivalent quality, according to benchmarks published by Google. WebP also supports transparency (alpha channel) and animation — things JPEG cannot do. Since 2023, WebP is compatible with all modern browsers (Chrome, Firefox, Safari 14+, Edge) and with major CMS platforms. Converting directly from HEIC to WebP — skipping the intermediate JPEG step — gives you the best size-to-quality result for web publishing.
Converting HEIC to WebP involves transcoding between two lossy compression formats. At the default quality setting (85%), the visual difference is imperceptible on screen. For professional photographers requiring maximum fidelity, it is preferable to export from the original RAW in a tool like Lightroom. For web use — portfolios, online stores, blogs — quality at 85% is perfectly adequate, and the weight reduction directly benefits the Core Web Vitals LCP (Largest Contentful Paint).
WebP has universal support in modern browsers: Chrome 23+ (2012), Firefox 65+ (2019), Edge 18+ (2018), and Safari 14+ (2020, on iOS 14 and macOS Big Sur). According to caniuse.com, WebP covers more than 97% of global web traffic as of 2025. Internet Explorer does not support WebP, but its market share is below 0.5%. For the rare cases requiring IE compatibility, use the HTML picture element with a JPEG fallback.
Live Photos are actually two files: a static HEIC image and a short MOV video. The converter processes the static part (HEIC) and converts it to WebP. The video component of the Live Photo is not included in the result — you get a static WebP image. If you need to preserve the motion, convert the MOV to animated WebP using a dedicated video-to-WebP tool.
Product catalogs photographed with an iPhone generate hundreds of HEIC files. Uploading them directly to Shopify, WooCommerce, or PrestaShop can result in images of 3-6 MB per product — disastrous for load times and LCP. Converting to WebP at 85% reduces that weight to 300-800 KB with no appreciable visual difference. In a catalog of 500 products, this translates to a storage reduction of several gigabytes and page load times 2-3 times faster, directly impacting SEO ranking and conversion rate.
Convert HEIC to WebP: optimize iPhone photos for the web
Since iOS 11 (September 2017), all iPhones and iPads capture photos in HEIC (High Efficiency Image Container) format by default. HEIC uses the HEVC (H.265) codec and achieves compression 50% better than JPEG at equivalent visual quality — outstanding for the phone's internal storage. However, the web has different priorities: universal compatibility, fast load times, and native browser support. HEIC fails on all three: most browsers do not support it, many CMS platforms reject it, and server-side processing requires additional libraries like libheif or ImageMagick with HEVC support. WebP, developed by Google in 2010 and standardized as part of the VP8 specification, solves exactly these problems: it offers 25-34% better compression than JPEG (according to Google's official benchmarks), supports transparency and animation, and is compatible with more than 97% of global web traffic according to caniuse.com.
The HEIC-to-WebP combination is the optimal route for mobile photography workflows oriented toward web publishing. Photographers shooting with an iPhone, e-commerce teams photographing products with their phones, and content creators publishing to blogs or social media all benefit directly. Instead of the traditional HEIC → JPEG (with quality loss and heavier files) → recompression to WebP (with additional loss) pipeline, direct HEIC → WebP conversion minimizes the number of transcoding steps and maximizes the quality-to-size ratio. For Shopify or WooCommerce stores, product images in WebP at 300-600 KB versus JPEGs at 2-4 MB make a measurable difference in the Core Web Vitals LCP (Largest Contentful Paint), one of Google's ranking signals since May 2021.
From a technical standpoint, in-browser HEIC-to-WebP conversion requires libheif (the reference implementation of ISO/IEC 23008-12, developed by struktur AG) compiled to WebAssembly — a binary format executable in the browser at near-native speed, standardized by the W3C in 2019. This enables processing HEIC photos without a server, preserving complete privacy of your images. WebP browser support reached critical mass with Safari 14 in September 2020, completing coverage across all four major rendering engines: Blink (Chrome/Edge), Gecko (Firefox), and WebKit (Safari). WordPress added native WebP support in version 5.8 (July 2021); Shopify and other e-commerce SaaS platforms have accepted WebP since 2019. Convertir.ai runs the entire HEIC decoding and WebP encoding process locally in your browser, without sending any data to external servers.