Photo preparation
Convert HEIC to JPG and verify the exported photograph
HEIC to JPG conversion requires exporting a newly encoded image, not renaming the filename. Preserve the original, create a JPEG copy with a native tool that supports it, and reopen the copy. Check orientation, color and pixel dimensions before using it as a photo reference or sharing it with an editor.
In this guide
- Original retainedThe HEIC source remains available under its original name.
- JPEG exportedThe export tool actually writes JPEG image data to a separate file.
- Appearance checkedBoth faces, orientation and important colors match the intended view.
- Dimensions recordedThe new copy has the expected width and height in pixels.
Check whether conversion is needed
An HEIC file commonly stores a still image using the HEIF family of formats. Apple distinguishes HEIF photos from HEVC video in its compatibility guidance. If an editor or destination accepts your original photograph correctly, conversion may be unnecessary. Keep the original as your source of record even when you create a more widely compatible JPEG copy.
First identify what failed: the file cannot be opened, a destination rejects its format, or the displayed image has an orientation or color problem. Those are different symptoms. An image that already opens but appears sideways needs an orientation check; making a smaller JPEG without inspecting it may carry the problem forward.
This guide owns compatible-copy export after portrait selection. It does not recommend a different photograph or promise that converting a format improves a future video result. The Zombie Couple site currently provides a local photo preview; generation and checkout remain disabled. Use the actual destination's current file requirements rather than assuming all tools accept the same formats.
Keep the original and establish a visual baseline
Copy the HEIC photograph into a working folder without changing its contents. Give the folder or a short note the source date and any relevant context, such as “B portrait, upright view.” Avoid overwriting the only original during conversion or cleanup. A compatible copy is a derivative, not a replacement for the source.
Open the original in a viewer that displays it correctly. Note which way is up, whether the image is mirrored and whether both people fit within the existing crop. Record the visible width and height in pixels when the viewer exposes them. A phone portrait may be described as 3024 by 4032 pixels, for example; that is an illustrative dimension pair, not a requirement.
Use a familiar face and a neutral object as comparison points for color. The exported JPEG may be viewed through a different display or color-management path, so compare on the same screen first. If the source itself already looks wrong, resolve that baseline before deciding whether the conversion succeeded.
Use Preview on a Mac to write a JPEG copy
Apple's Preview guide documents converting images through File and Export. Open the HEIC image in Preview, choose File, then Export. In the Format menu choose JPEG, select a new destination and filename, adjust the available quality control as appropriate, and save the exported copy. Use Export rather than changing the name in the file browser.
Apple notes that holding the Option key while opening the Format menu can reveal additional formats. If JPEG is not visible, consult the current guide and confirm that you are exporting an image rather than looking at a different save dialog. Application versions may differ, but the essential operation is selecting JPEG as the output format.
Choose a quality setting that retains the facial detail needed for the intended reference, then inspect the result. This article does not prescribe a universal slider value because source content and destination requirements differ. Export once from the original for each final candidate instead of repeatedly recompressing the last JPEG.
A recoverable file pair
Keep partner-b-original.heic. Export partner-b-compatible.jpg through Preview’s JPEG Format option. Record the original and exported pixel dimensions, then open the JPEG independently before selecting it in another tool.
Reopen the exported image and confirm its format
Close the export dialog and open the new JPEG from its destination folder. Confirm that you selected the new file, not a recent-item shortcut pointing to the original. Check the format information shown by the viewer or file properties where available. A .jpg suffix is useful naming information, but it is not sufficient evidence of conversion by itself. Renaming portrait.heic to portrait.jpg leaves the encoded image data unchanged. Some software identifies files from their contents and may still open it; another destination may reject the mismatch. Return to the original and perform a supported export if the filename was changed without conversion.
If the exported file fails to open, do not keep renaming it or upload it repeatedly. Reopen the source, repeat the export to a new path and confirm that the operation completed. A zero-length or partial file is a separate failure from an unsupported format. Keeping the original untouched gives you a safe starting point for that retry.
Check orientation and dimensions independently
Compare the two images at the same visual size. Both faces should remain upright, and any intended left-right arrangement should be preserved. Image viewers can interpret orientation metadata differently, so a correct thumbnail is a useful clue but not a complete check. Open the full image in the application that will actually use the copy.
Record width and height again. A 3024 by 4032 portrait exported without resizing should retain that intended pixel geometry in the compatible copy. If it becomes 756 by 1008, investigate whether you exported a preview or applied a resize. Both versions can look similar when fitted to a small window, but the smaller image contains fewer pixels.
Do not compare file size as a substitute for dimensions. JPEG compression can produce a much smaller file while retaining the same width and height. Conversely, a large file can still be a poor reference if it has been enlarged from a small source. Keep dimensions, compression quality and visual detail as separate observations.
| Observation | Meaning | Next check |
|---|---|---|
| Same dimensions, smaller file | Compression or encoding changed storage size | Inspect facial detail and edges |
| Width and height swapped | Rotation or orientation handling may differ | Open full image and check upright view |
| Much smaller dimensions | A resize or preview export may have occurred | Export again from the original |
| Same suffix, failed import | Filename alone did not establish compatibility | Verify the actual export format |
Compare color without inventing missing information
Look at skin, hair, dark clothing and a neutral part of the background on the same display. If the JPEG appears washed out or much darker, inspect the export and viewer's color handling before accepting it. HEIF sources can include image characteristics that do not map identically to a simple JPEG workflow; the goal is a usable, inspected copy rather than a claim of lossless equivalence.
Check fine edges around eyes and hair at a closer view. JPEG is a lossy format, so an aggressive quality reduction can create visible artifacts. Increase export quality or use another format accepted by the destination when the artifacts interfere with the purpose of the reference. Return to the HEIC original for that new export.
Avoid adding facial enhancement during a compatibility conversion. A reconstructed eye or smoothed face changes the image beyond the format task. If a cleanup is needed, make it a separate controlled edit with an original-versus-edited comparison. That separation makes it easier to locate where an unexpected appearance change began.
Choose a future capture setting without confusing existing files
Apple documents Settings, Camera, Formats, Most Compatible on supported iPhones and iPads for capturing new media in more compatible formats. That setting affects future captures; it does not convert the HEIC photos already in your library. Export existing images separately when a current workflow needs JPEG.
Keep only the compatible copies you actually need and preserve their connection to the originals. If you create several variants for different destinations, label their dimensions or purpose. “Partner B, full-size compatible copy” and “Partner B, small review copy” prevent a low-resolution review image from becoming the production reference by mistake.
Finish by testing the chosen copy in the intended local preview or independent editor, then inspect both the file and its displayed crop. A successful open establishes compatibility for that step; it does not validate the rest of a generation or publishing workflow. Save the accepted filename and conversion note so you can reuse the same inspected image later.
- Original HEIC still opens correctly.
- JPEG was created by a format export.
- Full image is upright and not unexpectedly mirrored.
- Pixel dimensions match the intended copy.
- Faces and important colors remain usable in the destination.