Image Resizer

Common uses

Resize photos to fit upload limits, create thumbnails, prepare images for a website at exact dimensions, or shrink a picture for email. Combine with the Image Compressor to also cut the file size.

Resizing vs. compressing

These solve different problems. Resizing changes an image's pixel dimensions (say 4000×3000 to 1200×900); compressing keeps the dimensions but reduces the file size. You often want both — resize to the dimensions you actually need, then compress to trim the last kilobytes. Our full guide on resizing without losing quality covers the details.

Keep the aspect ratio

Changing only the width or only the height stretches an image and distorts faces or objects. Locking the aspect ratio scales both dimensions together so the picture stays proportional. This resizer keeps the ratio locked by default and calculates the matching dimension for you.

What size do you need?

• Web hero image: ~1920px wide is plenty.
• In-article image: 1000–1200px wide.
• Thumbnail or avatar: 150–400px.
• Email: 1000–1600px keeps it clear yet light.

Remember: shrinking an image keeps it sharp, but enlarging beyond the original resolution adds softness because the software has to invent pixels. Always start from the highest-quality original you have.

Private, in your browser

Resizing happens locally using the Canvas API, so your images are never uploaded. It's fast, free, and safe for personal or confidential pictures.