masstree.inHEIC to JPG
iPhone photos saved as HEIC won't open on many sites and PCs. Drop them here and get JPGs that work everywhere.
Runs in your browser — nothing is uploaded or stored on a server.
Settings
Metadata (EXIF, GPS) is always removed. Leave width and height empty to keep the original size. Each file row has crop and favicon-pack buttons; a rename pattern uses {n} for a number and {name} for the original name.
Result
Crop
Drag inside the box to move it, drag the corner to resize, or draw a new box.
Why HEIC
iPhones save photos as HEIC to use half the space, but many upload forms, Windows apps and printers only accept JPG.
Batch conversion
Drop a whole set — each photo is converted and you can save them one by one or as a ZIP.
Stop it at the source
On the iPhone, Settings → Camera → Formats → Most Compatible makes new photos JPG from the start.
Questions
Is quality lost?
Very little at the default 80% quality; raise the slider to 95% for near-original quality.
Does it work on Windows?
Yes, in Chrome, Edge or Firefox.
Are my photos uploaded?
No, conversion is done in your browser.