Privacy Tips When Compressing Images for Mobile Apps
Many online compressors upload your images to a server. That is not always necessary. App screens are small and users are often on cellular data, so oversized images waste bandwidth and battery.
Recommended settings for mobile apps
| Setting | Starting point |
|---|---|
| Format | JPEG (WebP where accepted) |
| Width | about 1080 px on the long edge |
| Quality | 70 |
| File size | 150 KB or less |
These are practical defaults. If the platform or form you are using publishes its own limits, follow those instead.
Privacy Tips When Compressing Images
TheCompressJPEG processes images in your browser. Nothing is sent anywhere, which matters for IDs, documents and family photos.
Before sharing images for mobile apps, also check the picture itself: addresses, licence plates and documents in the background can reveal more than you intend.
Step by step with TheCompressJPEG
- Open the compress JPEG to 150 KB tool, or the main compressor for custom settings.
- Drop in your image. Nothing is uploaded; it is processed in your browser.
- Set the maximum width to 1080 and the target size to 150 KB.
- Press Compress, check the result and download it.
Quick tips
- Always keep the original file and compress a copy.
- Use JPEG for photos and PNG for logos and line art.
- Name files descriptively with lowercase words and hyphens.
- Check the result on a phone, where most people will see it.
FAQ
Is WebP accepted for e-learning courses?
It depends on the platform. JPEG is the safest choice when you are not sure.
What size should an image be for e-learning courses?
A practical default is about 1600 pixels wide and 200 KB or less, unless the destination states its own limits.
Can I compress images for e-learning courses without uploading them?
Yes. TheCompressJPEG runs entirely in your browser, so your images never leave your device.
Wrapping up
For mobile apps, the reliable recipe is simple: resize to around 1080 pixels, compress at quality 70 or to a 150 KB target, and check the result before you upload. Keep the original so you can always start again.
Related guides
- Understanding KB and MB When Preparing Images for Mobile Apps
Size limits are written in kilobytes and megabytes, and the units trip people up.
- Aspect Ratios to Use for Mobile Apps
Aspect ratio is the shape of the image, and the wrong one leads to awkward crops.
- Converting HEIC to JPEG for Mobile Apps
iPhones save photos as HEIC by default, and not every site accepts it.
- Upload Errors and File Size Limits for Mobile Apps
An upload error is frustrating when the message is vague.
- Understanding KB and MB When Preparing Images for iPhone Photos
Size limits are written in kilobytes and megabytes, and the units trip people up.
- Converting HEIC to JPEG for WhatsApp Sharing
iPhones save photos as HEIC by default, and not every site accepts it.