How to Compress a Photo on iPhone (4 Free Ways)
Photo too big to email or upload? Here is how to compress a photo on iPhone for free, using built-in options or a quick browser tool. No app needed.
Updated · 4 min read
Use the free Compress ImageMake images smaller without making them look worse.No sign-up, no upload – runs in your browserConvert nowThe quickest way to compress a photo on iPhone is to open ConvertLime's free Compress Image tool in Safari, pick the photo, move the quality slider (or type a maximum size in KB), and tap Download. It takes a few seconds, works without an app or account, and the photo is never sent anywhere. Below is how to do that, plus three built-in iPhone options, so you can pick what suits you.
Why you might need a smaller photo
iPhone photos are big. That is great for keeping memories, but a problem when:
- An email bounces because the attachment is too large
- A website or form says "file must be under 1MB" or "under 200KB"
- You want to send a lot of photos without waiting
- Your phone or iCloud storage is nearly full
4 ways to compress a photo on iPhone
| Method | Choose exact size? | Keeps photo in Photos? | Best for |
|---|---|---|---|
| ConvertLime in Safari | Yes, quality and max KB | Makes a new copy | Forms, uploads, any size |
| Mail app size option | Small, Medium, Large | Sends a copy | Emailing photos |
| Crop in Photos | No | Edits the photo | Cutting out empty parts |
| Shortcuts app | Pixels only | Makes a new copy | People who like to tinker |
1. Compress the photo in Safari with ConvertLime
- Open Safari and go to the Compress Image page.
- Tap the box and choose Photo Library, then pick your photo. You can choose several at once.
- Move the quality slider. Lower means a smaller file. If a website gave you a limit, type it in the maximum size in KB box instead.
- Tap Download. Safari saves it to the Downloads folder in the Files app.
- To put it back in Photos, open the file in Files, tap the Share button, and choose Save Image.
iPhone photos are often HEIC. The compressor accepts them and gives you a JPG, which every website and computer can open. If you only need to change the format, see what a HEIC file is.
2. Pick a smaller size when emailing
When you add photos to an email in the Mail app and the attachments are large, iPhone usually asks which size to send: Small, Medium, Large or Actual Size. Choose Small or Medium to send a lighter copy. Your original photo is not changed.
This only works for email, and you do not get to choose an exact KB size.
3. Crop away what you do not need
Open the photo in Photos, tap Edit, then the crop button, and drag the corners in. A cropped photo has fewer pixels, so the file gets smaller. You can undo this later with Revert.
Cropping alone rarely gets a photo under a strict limit, but it helps a lot before compressing – especially for ID or form photos where only the face matters.
4. Use the Shortcuts app
The free Shortcuts app from Apple has a Resize Image action that sets a new width in pixels, and a Convert Image action that can save as JPEG. You can build a small shortcut that resizes and saves a copy. It works, but it takes some setting up and you cannot aim for an exact file size.
How small should your photo be?
| What you are doing | A sensible target |
|---|---|
| Emailing a few photos | 500KB – 1MB each |
| Uploading to a website or online shop | 200KB – 500KB |
| Exam, job or government form | Whatever the form says, often under 100KB |
| Keeping a family photo for printing | Do not compress – keep the original |
For a strict form limit, use a fixed-size tool: Resize Image to 100KB or Resize Image to 200KB. They lower the quality step by step and only make the picture smaller in pixels if they really have to.
How to check the photo's size on iPhone
In the Photos app, open the photo and tap the i button (or swipe up). Recent iOS versions show the file size, such as "2.4 MB", along with the camera details.
For a file you downloaded, open the Files app, press and hold the file, and tap Get Info. The size is listed there.
Stop photos being so big to begin with
If you often need smaller photos, you can make new ones lighter:
- Open Settings and tap Camera.
- Tap Formats.
- High Efficiency saves photos as HEIC, which is roughly half the size of a JPG. Most Compatible saves JPG, which is bigger but opens everywhere.
If you turn on higher-resolution options such as ProRAW or 48MP, files become much larger, so leave those off unless you need them.
Need to send many photos as one file?
If a website asks for one document instead of several photos, put them into a PDF with the Image to PDF tool. Each photo goes on its own page, and you can choose pages the same size as the photo or standard A4.
Frequently asked questions
Does the iPhone have a built-in photo compressor?
Not as a single button. You can make photos smaller by cropping, by sending them through Mail and choosing a smaller size, or by using the Shortcuts app, but there is no simple compress option in Photos.
How do I see the file size of a photo on iPhone?
Open the photo in the Photos app and tap the i (info) button or swipe up. On recent iOS versions it shows the file size and the pixel size.
Will compressing a photo on iPhone lower the quality?
A little, but at a medium to high setting you will not notice it on a phone or computer screen. Large prints are where heavy compression shows.
Does compressing change the original photo in my library?
No. The browser tool makes a new, smaller copy. Your original stays untouched in the Photos app.
Why are my iPhone photos so big?
Modern iPhone cameras take photos with many megapixels. Even in the space-saving HEIC format a photo is often a few MB, and as a JPG it can be larger.