Aspect Ratios to Use for Instagram Posts
Aspect ratio is the shape of the image, and the wrong one leads to awkward crops. Feed images are displayed at a fixed width, so anything far larger than that is extra weight the platform will resample anyway.
Recommended settings for Instagram posts
| Setting | Starting point |
|---|---|
| Format | JPEG (WebP where accepted) |
| Width | about 1080 px on the long edge |
| Quality | 78 |
| File size | 500 KB or less |
These are practical defaults. If the platform or form you are using publishes its own limits, follow those instead.
Aspect Ratios to Use
Common ratios are 1:1 square, 4:5 portrait, 3:2 classic photo and 16:9 widescreen. Pick the one that matches where the image will be displayed for Instagram posts.
Crop to the ratio first, then resize to about 1080 pixels on the long edge and compress. Cropping last can undo your careful sizing.
Step by step with TheCompressJPEG
- Open the compress JPEG to 500 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 500 KB.
- Press Compress, check the result and download it.
Quick tips
- Write a size limit slightly below the stated maximum to leave a margin.
- Process private images locally rather than uploading them to unknown servers.
- Crop out distractions so pixels go to the subject.
- Use WebP where it is supported and you control the page.
FAQ
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.
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.
Wrapping up
For Instagram posts, the reliable recipe is simple: resize to around 1080 pixels, compress at quality 78 or to a 500 KB target, and check the result before you upload. Keep the original so you can always start again.
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