Compressing Scanned Pages for Mobile Apps

Updated August 25, 2026 · 6 min read

Scanned pages are often saved at very high resolution. App screens are small and users are often on cellular data, so oversized images waste bandwidth and battery.

Recommended settings for mobile apps

SettingStarting point
FormatJPEG (WebP where accepted)
Widthabout 1080 px on the long edge
Quality70
File size150 KB or less

These are practical defaults. If the platform or form you are using publishes its own limits, follow those instead.

Compressing Scanned Pages

A page scanned at 600 DPI can be over 5000 pixels tall. For reading on screen, around 1080 pixels wide is enough.

Text on a white page compresses efficiently, so a target of 150 KB is usually achievable while staying sharp for mobile apps.

Step by step with TheCompressJPEG

  1. Open the compress JPEG to 150 KB tool, or the main compressor for custom settings.
  2. Drop in your image. Nothing is uploaded; it is processed in your browser.
  3. Set the maximum width to 1080 and the target size to 150 KB.
  4. Press Compress, check the result and download it.
Ready to try it? Compress your JPEG to 150 KB now. It's free and private.

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

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.

Is WebP accepted for e-learning courses?

It depends on the platform. JPEG is the safest choice when you are not sure.

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.

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