Best Image Size for Instagram Posts

Updated March 16, 2026 · 6 min read

There is no single magic number, but there is a sensible range for Instagram posts. 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

SettingStarting point
FormatJPEG (WebP where accepted)
Widthabout 1080 px on the long edge
Quality78
File size500 KB or less

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

Best Image Size

As a starting point, aim for roughly 1080 pixels on the long edge and a file size at or below 500 KB. That combination looks clean on modern screens without wasting bandwidth.

If the place you upload to publishes its own limits, those always win. Treat the numbers here as a practical default when no rule is given, and adjust down if uploads fail or pages feel slow.

Step by step with TheCompressJPEG

  1. Open the compress JPEG to 500 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 500 KB.
  4. Press Compress, check the result and download it.
Ready to try it? Compress your JPEG to 500 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

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 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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