Resize Image to 300×300
Resize to 300×300 for web thumbnails, WordPress medium images, and square ad creatives. WordPress generates a 300-pixel medium size by default, so matching it keeps blog images consistent. This size is small enough to load fast in a list yet detailed enough to preview a product or article clearly.
Drag & drop a file here, or click to choose
Thumbnails and ad slots
WordPress automatically creates a medium image capped at 300 pixels, so exporting at 300×300 lines up with that theme size and avoids unexpected re-cropping. Many display ad networks also offer a 300×300 square placement.
For a grid of related posts or products, 300×300 keeps each preview uniform and light. The image is resized in your browser, so campaign artwork stays on your device before it goes live.
Getting clarity at 300 pixels
With 90,000 pixels, a 300×300 thumbnail shows a subject well but loses fine text. For ad creatives, use a large, readable headline and a single focal image rather than a busy layout.
It shares the 1:1 shape with larger squares, so you can downscale a 600×600 or 1080×1080 master to 300×300 with no cropping, just a cleaner, smaller file.
How to use Resize Image to 300×300
- 1Drop an image into the box above, or click to choose one (JPG, PNG or WebP).
- 2The target size 300×300 is pre-loaded — adjust it if you need a variation.
- 3The result updates live; download it when it looks right.
Frequently asked questions
Why does WordPress use a 300-pixel medium size?
WordPress auto-generates a medium image constrained to 300 pixels for use in post grids and sidebars. Providing a 300×300 file matches that slot exactly.
Is 300×300 a standard display-ad size?
It is a common square placement offered by many ad networks alongside sizes like 250×250 and 336×280. Check your network's spec sheet to confirm.
Can I put text on a 300×300 image?
Use only short, large text. At 300 pixels fine print becomes unreadable, so a single bold headline works far better than a paragraph.