How Should You Compress Images Before Posting to Social Media?
Most social platforms re-compress your image server-side after upload, to save their own storage and bandwidth. Getting the file size and dimensions right beforehand reduces the extra quality loss that second compression pass causes.
Why uploading the original often looks worse
A platform's server-side compression is designed around its own cost, not necessarily around the specifics of your image — it may apply a fairly aggressive quality setting to every upload, regardless of whether the source was already small and clean. Upload a multi-tens-of-MB original, and the platform's compression will squeeze it down to some quality level you have no visibility into.
Rough display sizes for common platform layouts
| Placement | Typical display width | Suggestion |
|---|---|---|
| Single feed image | ~1080px | Set the longest side to 1080-1350px, balanced preset |
| Cover / header image | ~1200-1600px | Set the longest side to around 1600px, balanced or high quality |
| Multi-image carousel | ~1080px | Use the same settings across the whole set, so clarity stays consistent |
These are rough reference ranges rather than exact platform specs — check the platform's current official guidance for precise numbers. This is meant as a starting point that won't be way off.
Batch-processing a full set of images
For a multi-image post, drop the whole set into the tool with one shared compression strength and max-side setting, then batch-process and download together — that keeps clarity and style consistent across the set instead of one image looking noticeably sharper or blurrier than the others.
- Process an entire carousel or multi-image set with identical settings to keep the visual consistency.
- Bump the quality preset up for images with text or fine product detail, so key information doesn't blur.
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