Short answer
Add a copy of one HEIC photo and choose JPG. Run preflight, the app's readiness check, then convert that one photo first.
Open the JPG and compare it with the HEIC original. If its color, orientation, detail and metadata look right, reuse the same settings for the remaining photos.
When to use this method
Use this method when a website or app accepts JPG but not HEIC, especially when several photos need the same settings.
HEIC compatibilityHow preflight checks the selected file before conversion.
- How it works
- The app reports whether the selected HEIC file and operation are available on the current machine before conversion.
- Important limit
- Preflight reports HEIC or HEIF as available only when the current app runtime can read the selected file.
What you need before converting HEIC
- A copy of one HEIC photo that represents the rest of the batch
- A separate folder for the JPG result
- The size or quality rules required by the website or app that will receive the JPG
HEIC is a compact image format commonly used by phones. JPG works in many more places, but it can discard some detail to make the file smaller. Keep the HEIC original.
Convert one HEIC image first
Confirm support in preflight
Add one representative HEIC file. Run preflight before changing the rest of the settings.
You should see: the selected file is ready to convert. Stop if the app says it cannot read the file.
Choose JPG quality
Use a practical quality setting and avoid reducing dimensions unless the destination requires it.
You should see: JPG as the planned output and the dimensions you intend to keep.
Decide what metadata should remain
Review location, camera and date metadata before choosing whether to keep or remove it.
You should see: the metadata choice you want applied to the JPG.
Convert the sample
Save the result in the separate output folder. Open it when conversion finishes.
You should see: one new JPG that opens normally and leaves the HEIC original unchanged.
If preflight rejects the file or the JPG looks different
HEIC and HEIF files are not all encoded in exactly the same way. Preflight checks the current app runtime and the individual file. Do not start a batch after an unsupported result. If conversion succeeds, compare direction, color, and fine detail at normal viewing size. Raise JPG quality or keep the original dimensions when the destination allows it.
HEIC conversion mistakes
- Assuming every HEIC file is readable without checking preflight
- Deleting originals before checking orientation and color
- Removing metadata without reviewing what the destination needs
JPG checkpoint
- Preflight confirms the selected file.
- Before starting a batch, compare one HEIC and JPG side by side for orientation, dimensions, color and fine detail.
- The metadata you intended to keep or remove matches that choice.
- Keep the HEIC original even when the JPG looks correct.
Just Converter
Check whether this PC can decode the selected HEIC, then reuse approved JPG and metadata settings for a local batch.