# Bulk HEIC to JPG converter

> Server-based converters cap free batches at five or ten files because bandwidth costs money. This one runs on your processor, so the only real limit is how much memory your device has.

Source: https://jpg-heic.com/bulk-heic-converter | Section: Converter | Updated: 2026-08-31

## How many files can you actually do at once?

There is no artificial cap here, but there is a physical one. Each photo is decoded into raw pixels
 before being re-encoded, and a 12 MP image occupies roughly 48 MB of memory in that state. The browser
 releases it after each file, but on a device that is already low on memory the tab can be killed
 mid-batch.

| Device | Comfortable batch | Notes |
|---|---|---|
| Desktop or laptop, 16 GB RAM | 300–800 files | Close other heavy tabs first |
| Laptop, 8 GB RAM | 150–300 files | Expect it to slow down near the end |
| Chromebook | 50–150 files | Watch for the tab reloading |
| Phone or tablet | 20–40 files | Keep the screen awake or iOS suspends the tab |

## A workflow that does not fall over

 - **Work in chunks that match your device**
 Two batches of 200 finish faster than one batch of 400 that crashes at file 380. Use the Clear
 button between rounds to release memory.

 - **Decide on quality once, before you start**
 Changing the slider mid-batch only affects files converted afterwards. 90% is a good default for
 archiving; 80% is fine if the photos are heading for a group chat.

 - **Resize if these are for sharing, not archiving**
 Capping at 2000 px cuts both conversion time and output size by more than half, and nobody
 viewing photos on a phone will notice.

 - **Keep the tab in the foreground**
 Browsers throttle background tabs aggressively. On a phone, also stop the screen locking —
 a suspended tab stops mid-conversion.

 - **Save all as a ZIP at the end**
 The ZIP is assembled in memory, so for very large batches save in groups instead of building one
 enormous archive.

 **For thousands of files, use a desktop tool.** A browser is the wrong instrument for converting
 an entire multi-year photo library. On a Mac, the Finder handles the whole thing through
 its **Convert Image** action, which chews through tens of thousands of files without complaint.
 On Windows, ImageMagick with `magick mogrify -format jpg *.heic` is far faster than any
 web page can be. This tool is the right choice for a folder, not an archive.

## Dropping folders rather than files

Dragging a folder from your file manager onto the drop zone works in Chrome, Edge and Firefox on
 desktop, and files are pulled from inside it automatically. Non-image files are ignored rather than
 failing the batch. If your browser does not accept the folder, open it, select everything with
 Ctrl/⌘+A and drag the files themselves.

## Frequently asked questions

**Is there a limit on how many files I can convert?**

Not one imposed by this site. Because conversion runs on your own device rather than a server, there is no bandwidth cost and therefore no reason to cap it. Your device's available memory is the practical limit — a few hundred files on a laptop, a few dozen on a phone.

**Can I drag a whole folder onto the page?**

Yes, in Chrome, Edge and Firefox on desktop. The images inside are collected automatically and any non-image files are skipped. If folder dragging does not work in your browser, select the files inside the folder and drag those instead.

**Why did the page slow down partway through a big batch?**

Memory pressure. Each decoded image is large in its raw form, and although memory is released after each file, garbage collection lags behind on long runs. Convert in smaller groups and press Clear between them.

**Do all the files come back in one download?**

Yes — Save all builds a single ZIP containing every converted image. You can also save files individually as they finish, which is more reliable for very large batches.