Convertslate

HEIC converters

Convert your iPhone photos without handing them to anyone

Every converter here runs inside your browser. Your photographs are read, converted and saved on your own machine — they are never uploaded, because there is no server to upload them to.

How it works

An animation of this converter at work: three HEIC files arrive as numbered frames, convert one after another, and each is marked with a red corner bracket when its JPG is ready to save.
Your files appear as frames and convert one at a time. Nothing is sent anywhere — open your browser’s network tab and watch.

Which format do you need?

Why this works differently

Most online converters

  • Your photo is uploaded to a server
  • It is converted on a machine you do not control
  • It is held there for some period
  • The result is sent back to you

Convertslate

  • Your photo never leaves the device
  • It is converted by code that came to you
  • There is nothing to hold, and nothing to delete
  • It still works with the internet switched off

That is a reasonable engineering choice on their part, and it is how nearly all of them work. The honest trade-off here is that the decoder is about a megabyte, downloaded the first time you convert something, and very large batches are limited by your own device rather than by a server farm.

Questions

Are my photos uploaded anywhere?

No. The converter is a WebAssembly module that downloads to your browser once and then does all the work on your own machine. There is no upload endpoint and no storage. You can check this yourself: open your browser’s network tab while converting, or simply disconnect from the internet after the page has loaded and convert anyway.

Does this work on Windows?

Yes, and that is what most people come here for. The conversion happens inside your browser, so Windows never has to understand HEIC at all — it only ever sees the ordinary JPG, PNG, WebP or PDF that comes out.

Is it free? What is the catch?

It is free, and the reason is boring: there is no server doing the work, so there is almost nothing to pay for. Your computer does the converting.

Which format should I pick?

JPG if you just need the photo to open somewhere else — it is the safest choice by far. PNG if the image will be edited again or needs transparency. WebP if it is going on a website and file size matters. PDF if the photos need to arrive as a document someone will print or file.

New here?

If you are not sure what HEIC even is, start with what HEIC is and why your photos use it. If the problem is specifically that the files will not open on a PC, read how to open HEIC on Windows.