How to convert HEIC to JPG on Windows
Short answer: the free built-in route is Paint — but first Windows needs the HEIF Image Extensions from the Microsoft Store to decode .heic at all. If you cannot install anything, drop the file into the browser converter below and get the JPG without touching Windows codecs.
The typical Windows experience of someone else’s iPhone photo: double-click the file, get“This app can’t open” or a codec error, then hunt through menus that grey out Save As. That is not a broken file — it is Windows lacking the decoder. Three of the four routes below remove that dependency in different ways.
Way 1: Fix Windows first — install the HEIF extension
Open the Microsoft Store, search HEIF Image Extensions, install it (it is Microsoft’s own package). Suddenly Photos opens the file, File Explorer shows thumbnails, and Paint can load it. This is one-time setup that fixes HEIC handling machine-wide.
Way 2: Convert with Paint (built in)
With the extension installed: right-click the photo → Open with → Paint. ThenFile → Save As → JPEG picture, choose a destination, save. The JPG appears immediately with the same resolution. Paint is the closest thing Windows has to a zero-install HEIC to JPG converter — no cloud round-trip, no browser tab.
Way 3: Convert in the browser (no extension, no admin rights)
On locked-down work machines where the Store is disabled, use the converter below: drag the .heic file in, JPG is already selected, press Download when it finishes. The decoding engine runs in the tab, so Windows’ missing codec never enters the picture — and the photo never leaves the machine it is being viewed on.
Way 4: Email it to yourself? (Works, but wasteful)
Forwarding a HEIC through Gmail or Outlook can trigger server-side conversion to JPG — at the mercy of whoever runs the mail server, usually at reduced quality, and the file now exists in someone’s inbox. Use a local route instead. If the photo is going to email anyway, the HEIC to JPG for email guide covers sizing.