Choose HEIC photos
Add up to five HEIC or HEIF files that fit the displayed safety limits.
Convert HEIC and HEIF photos from your iPhone to adjustable-quality JPG files with local previews. Decoding runs inside your own browser.
Three simple steps, with your content kept on your device.
Add up to five HEIC or HEIF files that fit the displayed safety limits.
Set the balance between output size and visible image detail with the quality slider.
Review each local JPG result and download files individually or together.
Fast, focused, and made to be clear on every screen.
Processes several HEIC files sequentially without sending them to a server.
Adjust JPG quality and compare each input size with its output size.
Loads the bundled HEIC decoder only after you start a conversion, so nothing heavy downloads until you need it.
HEIC (High Efficiency Image Container) is the photo format Apple made the default on iPhone and iPad with iOS 11. It stores pictures using the HEVC (H.265) video codec inside an ISO Base Media File Format container. Outside the Apple ecosystem the same family of files is called HEIF (High Efficiency Image File Format). A single HEIC file can hold the primary image, smaller thumbnails, and metadata together, which is part of why the format is so efficient.
iPhones save photos as HEIC because the format produces noticeably smaller files than JPEG at the same visual quality — often about half the size. That saves storage space on the phone and makes photo libraries lighter to back up and share through iCloud.
The trade-off is compatibility. HEIC is not understood natively by many websites, older software, and some desktop tools. When a form, an email recipient, or an editing program expects a JPG, a quick local conversion is the easiest way forward.
JPG (JPEG) has been the universal image format for decades: every operating system, website, and printer can open it. HEIC wins on modern compression and file size, while JPG wins on compatibility.
After converting to JPG you can attach the photo to email, upload it to a web form, or open it anywhere. In exchange you get a larger file and slightly less efficient compression than the original HEIC, which is why keeping the source file is still a good idea.
Valestiom reads the file bytes directly in your browser and hands them to a self-hosted decoder that runs inside a Web Worker. The decoder unpacks the HEIC image, re-encodes it as a JPG at the quality you chose, and creates a downloadable result — all within the current tab.
The decoder is only loaded after you start a conversion, so visitors who are just reading the page do not download the conversion engine.
HEIC files are personal — they are your camera roll. This tool performs every step in your browser: no server receives the file, no account is required, nothing is stored, and no analytics ever see your image data.
Because the conversion library is bundled with the site itself, converting does not involve sending your photo to any third-party service.
The JPG quality slider runs from 40% to 100%. Higher quality keeps more detail but produces larger files; lower quality shrinks the file at the cost of visible artifacts in areas with fine texture or gradients.
The default of 90% is a balanced starting point for typical photos. If the resulting file is larger than you need, lower the quality step by step and compare the preview until the size is right.
Conversion requires a modern browser with Web Workers, the File API, Blob URLs, and image decoding. Current desktop browsers (Chrome, Firefox, Edge, Safari) and most recent mobile browsers support these.
Some files cannot be converted: unusual HEIF variants, protected or encrypted files, and Live Photo video tracks are not supported. When that happens the tool reports a clear error instead of returning a broken file.
No. Valestiom uses a bundled browser decoder, but conversion still requires Workers, the File API, Blob URLs, and image decoding. Current desktop browsers and most recent mobile browsers support these. Protected files, unusual HEIF variants, or very large photos can still fail — in those cases the tool explains the failure instead of returning a broken file.
No. The selected bytes are read and decoded locally in your browser. No file content is sent to Valestiom or any other service, no account is needed, and nothing is stored after the tab is closed.
No. This focused converter creates one JPG from the primary image and does not copy EXIF metadata, depth data, video, or additional frames. If you need those preserved, keep the original HEIC file as your source.