What JPEG is and why you might need to convert

JPEG is a file format that makes photos smaller without losing much visible quality. Your phone probably stores photos in HEIC (on iPhone) or another format, which takes up more storage space. Converting to JPEG is useful when you need to send a photo to someone with an older device, upload it to a website that only accepts JPEG, or straightforward free up phone storage.

The conversion process is straightforward on both iPhone and Android. You do not need to read special apps — your phone has built-in tools that handle this. The steps differ slightly between the two systems, so this guide covers both.

Key Takeaways

  • iPhone users can convert photos to JPEG through the Photos app by sharing to Files, or by changing the default camera format in Settings.
  • Android users can convert photos using Google Photos, the built-in Gallery app, or free apps like ImageMagick that let you pick the format.
  • Converting a photo creates a new file — your original stays on your phone unless you delete it.
  • JPEG files are smaller than HEIC or RAW formats, so converting saves storage space on your device.

Converting photos on iPhone

The simplest method on iPhone is to change your camera settings so new photos save as JPEG instead of HEIC. Open Settings, tap Camera, then Formats. Select Most Compatible instead of High Efficiency. From that point forward, photos you take will be JPEG files. This does not convert existing photos — only new ones.

To convert photos you already have, open the Photos app and select the photo you want to convert. Tap the Share button (the box with an arrow), then tap Save to Files. Choose a location on your phone, and before you tap Save, change the filename to end with .jpg instead of .heic. This creates a JPEG copy while keeping your original.

A second method is to share the photo to Mail. Open the photo, tap Share, select Mail, and create a blank email. When you do this, iPhone automatically converts the photo to JPEG format. You can then save the email draft and extract the photo, or straightforward send it to yourself and read it from your email.

Converting photos on Android

Google Photos is the easiest route on Android. Open Google Photos, select the photo you want to convert, tap the three-dot menu, and look for read or Export. If your version shows these options, tap read — Google Photos will save a JPEG copy to your phone's Downloads folder. Not all Android versions show this option, so if you do not see it, move to the next method.

Your phone's built-in Gallery or Photos app may also have a convert or export option. Open the photo, tap Edit or the three-dot menu, and look for Save As or Export. If a format menu appears, select JPEG. The exact wording varies by phone manufacturer — Samsung, Google Pixel, and other brands have slightly different layouts — but the concept is the same.

If neither of those works, read a free app like ImageMagick or Image Converter from the Google Play Store. These apps let you pick a photo from your phone and choose JPEG as the output format. They are straightforward: select the photo, pick JPEG, and tap Convert. The new file saves to your Downloads folder.

Where your converted photos end up

On iPhone, converted photos appear in the same Photos app where you found the original. If you used the Files method, check the location you selected — usually iCloud Drive or On My iPhone. If you used Mail, the photo is in your email draft or sent folder.

On Android, converted photos go to your Downloads folder by default. Open your file manager or Gallery app, navigate to Downloads, and you will see the new JPEG file there. You can move it to your main Photos folder if you want to keep it with your other pictures.

Checking file size before and after

To see how much space you saved, find the original photo and the converted JPEG in your file manager. On iPhone, open Files and look at the file details. On Android, open your file manager, find both files, and long-press each one to see its size. JPEG files are typically 30 to 50 percent smaller than HEIC or RAW files, depending on the photo.

If you converted many photos and want to delete the originals to free up space, do this carefully. Make sure the JPEG versions are where you want them before you delete anything. On iPhone, if you delete from Photos, the file is gone. On Android, deleted files go to a Trash or Recently Deleted folder for 30 days, so you have time to recover them if you change your mind.

Why conversion sometimes looks different

JPEG uses compression, which means some detail is thrown away to make the file smaller. For most photos, you will not notice the difference. However, if your original was a high-quality HEIC or RAW file taken in good light, the JPEG version may look slightly softer or have less color depth. This is normal and usually not visible unless you zoom in or compare side by side.

If you are converting a photo that is very important — a professional headshot, a document, or artwork — test the conversion on a copy first. Take a screenshot of both versions and compare them on a larger screen. If the quality loss bothers you, keep the original and only share the JPEG when you have to.

Frequently Asked Questions

Can I convert multiple photos at once?

On iPhone, you have to convert photos one at a time through the Photos app. On Android, some apps like ImageMagick let you select multiple photos and convert them all together. Google Photos does not have a batch convert option, so you would need to use a third-party app for that.

Will converting to JPEG delete my original photo?

No. Converting creates a new file. Your original stays on your phone unless you manually delete it. You can delete the original after you confirm the JPEG version looks good, but the conversion itself does not remove anything.

What if a website says it does not accept JPEG?

The website probably wants a different format like PNG or WebP. You can convert to those formats the same way — just pick the format from the menu instead of JPEG. If the website specifies a size or resolution, check the photo details before uploading to make sure it meets the requirements.

Does converting to JPEG make the photo smaller in dimensions?

No. Converting changes the file format and file size in megabytes, but not the width and height of the image. A photo that is 4000 by 3000 pixels stays that size after conversion. If you need to make the photo smaller in dimensions, you need to resize it, which is a different step.

Can I convert JPEG back to HEIC?

Yes, but the quality will not improve. Once you convert from HEIC to JPEG, the lost detail stays lost. Converting back to HEIC just changes the wrapper — it does not restore what compression removed. Keep your original HEIC files if you think you might need them later.