Resize an Image to 300 KB on Android or iPhone
Need an image under 300 KB? Set a 300 KB target in ResizePing on Android or iPhone, check the projected size, and save a smaller copy.
Published October 26, 2026
To resize an image to 300 KB, open the photo in ResizePing on Android or iPhone, set Mode to Target size and type 300 in the Target (KB) field. The app shows a projected size before you save and tells you when 300 KB can't be reached.
Need a photo at this size? ResizePing resizes photos to exact dimensions or a file size on iPhone and Android. Get it on Google Play or the App Store.
Steps
- Open ResizePing and pick the photo you want to shrink.
- Set Mode to Target size.
- In Target (KB), type 300.
- Pick the format the form asks for: JPG, PNG or WEBP. Leave Strip metadata on unless the form says otherwise.
- Read the Projected size before you run.
- Tap Run, then check the result size before you upload.
Never uploaded to our servers.
If 300 KB is not reachable
If ResizePing can't reach the target it says "Can't get this under 300 KB. Try a larger size or lower resolution." Lower the resolution first, then try the target again:
- Switch Mode to Dimensions or Percent and make the photo smaller.
- Run it, then open the smaller result, set Target size, type 300 in Target (KB) and tap Run.
What to know
- ResizePing works on photos.
- The projected size is an estimate, so read the real size of the result before you upload.
- If the form has a hard 300 KB limit, check the saved size before you upload; if it is over, type a slightly lower target, such as 299.
- Location data is stripped by default. You can process one photo or a batch.
FAQ
How do I resize a photo to 300 KB on Android?
Open ResizePing, choose Target size, type 300 in Target (KB), read the projected size and tap Run. Check the size of the result before you upload.
How do I reduce an image to 300 KB on iPhone?
Pick the photo in ResizePing, set Target size, type 300 in Target (KB) and tap Run. ResizePing is on the App Store.
Does it upload my photo?
No. Never uploaded to our servers.
Where do I look for other sizes?
Other KB limits have their own guides, linked below, and the general guide covers how to resize an image in KB.
Related guides
- Resize an Image to 250 KB on Android or iPhone
- Resize Image in KB on Android or iPhone (10 KB to 2 MB)
- Resize an Image to 150 KB on Android or iPhone
- Resize an Image to 10 KB on Android or iPhone
- How to Resize a Photo to 15 KB for a Form Upload
- Resize an Image to 20 KB on Android or iPhone
- How to Resize a Photo to 30 KB for an Exam or Job Form
- Resize an Image to 20 KB or 50 KB on Android or iPhone
- How to Reduce Photo Size to 100 KB
- How to Compress an Image to 200 KB for a Visa or Portal Upload
- How to Compress an iPhone Photo to 500 KB
- How to Compress Image Size on Android and iPhone (Step by Step)
- How to resize a photo to passport size (35x45 mm)
On a computer
On a computer instead? Ping Tools Lab has a browser tool: Resize Image to 300 KB.