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Convert HEIC to JPG for Email Attachments

Two problems at once: your recipient cannot open a .heic, and a dozen photos will not fit under the limit. Convert below and watch the file sizes as you go.

100% Local — Files Never Leave Your Device

HEIC to JPG converter

Drop your photos here

or pick them from your device — each one shows its new size when it is done

Supports .heic and .heif from iPhone, iPad and modern Android cameras

Nothing queued yet. Each converted photo shows its old and new file size, so you can add them up before attaching.

Why a HEIC attachment lands badly

The message sends fine; the other end breaks. Outlook does not decode images itself — it asks Windows to, and Windows cannot read HEIC without the paid HEVC extensions. Your recipient gets an attachment with no preview and an error when they double-click it.

Android clients vary, older ones show a grey placeholder, and webmail often just offers a download the recipient still cannot open.

Compatibility and size are different fixes

Converting to JPG solves compatibility completely. What it does not do is shrink the file — HEIC uses a more efficient codec, so a high-quality JPG is usually bigger than the original. The quality slider is what controls size.

Budget about three quarters of your limit: email encodes attachments in base64, which inflates them by roughly a third on the wire. A 25 MB cap means keeping actual files under about 18 MB.

  1. Drop your photos in

    Drag them onto the box above or press Select Files. Conversion starts at 80% quality, tuned for email.

  2. Check the sizes, then attach

    Each card shows its new size. Add them up, lower the slider if needed, then download and attach in Gmail, Outlook or Apple Mail.

Frequently asked questions

Why won't Outlook open my HEIC attachments?

Outlook hands images to Windows to decode, and Windows cannot read HEIC without the HEIF Image Extensions, which depend on the paid HEVC codec. The attachment arrives intact but shows no preview and errors when opened. Converting to JPG fixes it for every recipient.

Will converting make the files small enough to send?

Not by itself — a high-quality JPG is usually larger than the HEIC it came from, because HEIC compresses more efficiently. Lower the quality slider to control size: a 12 MP photo runs roughly 5–6 MB at 95% and about 1 MB at 60%.

Is anything uploaded to a server?

No. The decoder is a WebAssembly module that runs inside your browser tab, so the photo is read from your device into memory and converted there. You can check it in your browser's Network tab, or disconnect from the internet once the page has loaded and convert anyway.