Resize an Image for an Email Signature
Email signature images should be modest — about 600 px wide for a full banner, or 300–400 px for a logo — and small in file size so they load fast and don't get clipped. Resize and compress to match, all in your browser.
The requirement
- Banner width
- ≈ 600 px wide
- Logo width
- ≈ 300–400 px wide
- File size
- Keep under ~50 KB
- Format
- PNG (logos) or JPG
These are typical published values and can change from year to year and from one portal to another. Always confirm the exact requirement in the official notification or upload portal before you submit — the official source takes precedence over anything here.
Step by step
- 1Crop the image to the shape you want (banner or square logo).
- 2Resize the width to about 600 px (or 300–400 px for a logo).
- 3Compress it small so it loads fast, then add it to your signature.
The free tools you need
Need something else? Try our free image resizer or crop an image online. You can also browse all free image tools — everything runs in your browser, with nothing uploaded.
Frequently asked questions
Around 600 px wide for a banner or 300–400 px for a logo, kept small in file size (under ~50 KB).
It's likely too large in dimensions or file size — resize to ~600 px wide and compress.
No — resizing and compression run in your browser.