Which format should I save my transparent logo in when I shrink it to 300 px wide?
Save it as PNG, or leave 'Save as' on 'Original format' if the logo is already a PNG. PNG and WebP both keep transparency, while JPEG fills the transparent areas with the background color, and the tool warns you before you download. For a logo that will sit on different backgrounds, PNG is the safe choice.
The numbers first
A transparent PNG logo measuring 1200 × 400 px.
With the ratio lock on, type 300 as the width and the height becomes 100 on its own.
The result is a 300 × 100 logo of the same shape, and the transparent area around it stays transparent as long as you do not pick JPEG.
Because the ratio does not change, no bands are added, and the fit mode makes no difference. The only thing that decides what happens to the transparency is the format you save in.
What each format does with transparency
- Original format: the tool saves in the format of the file you chose. A PNG logo stays a PNG, transparency included.
- PNG: keeps transparency and the soft edges around letters with no loss. There is no quality slider, because PNG gives up no detail.
- WebP: also keeps transparency, usually in a smaller file, and shows the quality slider. Check that wherever the logo is going accepts WebP.
- JPEG: has no transparency at all. A notice says the transparent areas will be filled with the selected background color, so your logo ends up inside a white or colored rectangle.
Why PNG for a logo in particular
A logo is usually letters and shapes with sharp edges and flat colors. Formats that discard detail, such as JPEG or WebP at low quality, can leave faint smudges around letters that show clearly on light backgrounds. PNG stores every pixel as it is, and a 300 px logo file is normally small anyway, so another format gains you little.
If the logo will appear 300 px wide on a website or in an email signature viewed on high-density screens, consider a second copy at 600 px shown at half size, so the letters stay crisp.
The steps
- Open the Image resizer and choose the logo file.
- Make sure the ratio lock is on and type 300 in the width field.
- Leave 'Original format' or choose PNG, and check that no transparency warning appears.
- Check the preview and download. If you need the logo in another format later, use the Image format converter.
Common questions
What is the transparent background option for?
It applies to the bands that 'Fit inside' adds when the ratio changes, making them transparent instead of colored. Shrinking a logo at the same ratio adds no bands.
My logo is a JPEG on white. Will the tool make it transparent?
No. The tool does not remove backgrounds. Saving as PNG keeps transparency that already exists; it does not create it.