PNG to JPEG for Email Newsletters & Social Media
Why convert images before sending or posting?
Convert images first because heavy files load slowly in email, and social platforms resize or re-compress what you upload. Handing them a clean, correctly sized JPEG gives you the best final result you can control.
You can’t change how Gmail or Instagram process images, but you can give them the best possible starting file. That’s the difference between a crisp newsletter photo and a blurry, slow-loading one.
How to prepare images for email newsletters
For newsletters, convert photos to JPEG, compress them, and keep each image to a few hundred KB. Email clients load images over potentially slow connections, so lightness matters here.
- Use JPEG for photos, PNG only for your logo.
- Resize to the width your email template displays (often about 600px; Mailchimp’s classic templates are no wider than that).
- Compress so each image is a few hundred KB at most.
| Channel | Format | Recommended size |
|---|---|---|
| Email newsletter | JPEG | 600px wide, <500KB |
| Instagram portrait | JPEG | 1080 wide, up to 1080×1440 (3:4) |
| Instagram square | JPEG | 1080×1080 |
| Facebook link preview | JPEG | at least 1200×630 |
How to prepare images for social media
Upload at the size each platform asks for, so it has less to change. Instagram keeps photos between 320 and 1080 pixels wide at their original resolution if the shape is between 1.91:1 and 3:4; it sizes larger photos down to 1080 pixels wide and crops unsupported shapes.
For Instagram, that means 1080 pixels wide: 1080×1080 for square, and up to 1080×1440 for portrait.
Why does social media ruin my image quality?
Platforms resize what you upload, and some say plainly that they compress it. Instagram sizes photos wider than 1080 pixels down to 1080 and crops shapes it doesn’t support; Etsy says images may look less sharp after upload because of its compression.
The fix is to do the resizing yourself, cleanly, before uploading — then the platform has less to alter. A pre-sized JPEG at the target dimensions leaves the platform less to change.
A simple pre-publish checklist
Before any image goes into an email or social post: convert to JPEG, resize to the platform spec, compress to 80%, and check the file is light. It takes a few seconds and gives each platform a good starting file.
The compress tool lets you batch this — drop in all your images for a campaign, set the size and quality once, and download the whole set ready to publish.
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