Frequently asked questions
Everything people ask about HEIC, WebP, image conversion, privacy and batch limits.
Is HEIC better than JPG?
Technically, yes — HEIC compresses about twice as efficiently, so an HEIC photo looks as good as a JPG at half the size. Practically, JPG wins on compatibility: every device, browser, website and printer opens it, while HEIC still trips up many Windows PCs and older software. Keep HEIC on Apple devices; convert to JPG when photos leave the Apple world.
Are online image converters safe?
It depends on what they do with your files. Cloud converters upload every image to their servers — fine for a throwaway screenshot, risky for private family photos or client work, and their privacy policies usually don't promise deletion. This site takes the other approach: conversion runs entirely inside your browser, so there is nothing to leak because nothing is ever uploaded.
Why can't Windows open HEIC files?
Windows needs two codec extensions (HEIF — free, and HEVC — sometimes $0.99) that are not pre-installed on every PC, especially clean Windows 11 installs and managed corporate machines. Installing them is one fix; using a browser-based converter like this one avoids the Store entirely.
Do you keep my images?
No — it is technically impossible. Images are read from your disk into the browser tab's memory, converted there, and offered back as downloads. There is no server-side storage, no upload code path, and closing the tab discards everything.
How many files can I convert at once?
As many as you want. Files are processed two at a time on your device. Unlike metered cloud services, there's no daily quota, no batch cap and no file-count pricing.
What's the largest file size supported?
50 MB per image — comfortably above a full-resolution iPhone photo (typically 2–8 MB).
Does it work offline?
Yes, after the page has loaded. Conversion happens locally, so you can disconnect from the internet mid-session and everything still converts and downloads.
Will converting reduce image quality?
Converting to PNG is lossless. Converting to JPG or WebP re-encodes the image — at the default quality 90 the difference is essentially invisible on photos. Lower the quality slider deliberately if you want smaller files at the cost of fidelity.
Why did my "JPG" from iPhone arrive as HEIC?
iPhones shoot HEIC by default (since iOS 11) and normally auto-convert when sharing — but not always: AirDrop to a Mac keeps HEIC, some messaging apps pass the original through, and email attachments occasionally keep it too. If the receiving end runs Windows, that's exactly the case this converter solves.
What is WebP and why do sites use it?
WebP is Google's image format: 25–35% smaller than JPG at equal quality, with transparency support. Websites use it to load faster. The catch is older software — some Windows apps and tools reject it, which our WebP to JPG page fixes.