Resize Image
Set the width and height.
Drop your image here or browse
Supports JPG, PNG, and WebP format
How to resize an image
- Drop the image in. Upload any JPG, PNG, or WebP photo. The current pixel dimensions, aspect ratio, and preview render immediately below the drop target.
- Set dimensions or choose a preset. Enter desired width and height in pixels, inches, centimetres, or millimetres, or choose an instant preset for Instagram (1080x1080), YouTube thumbnails (1280x720), Passport photos (600x600), or standard A4 sheets (2480x3508 at 300 DPI). Keep the aspect ratio lock enabled to prevent stretching.
- Choose format and download. Pick PNG, JPEG, or WebP and download your resized file. High-precision bicubic interpolation preserves smooth curves and sharp edges across both downscaled and upscaled graphics.
Technical specifications & privacy
Resizing relies on browser-native canvas scaling using multi-step bicubic resampling to prevent aliasing, jagged lines, and moiré patterns. Physical unit inputs (inches, centimetres, millimetres) calculate pixel equivalents dynamically at standard screen density (96 DPI) or print density (300 DPI). All computations occur in local RAM with zero server communication. Supports input images up to 8000x8000 pixels.
Common questions
Does resizing blur the picture?
Downscaling condenses pixel information and usually makes photos appear sharper. Upscaling beyond the original dimensions requires the browser to interpolate new pixels, which can cause slight softness if scaled beyond 150% of the original resolution.
What do the presets do?
They automatically fill in standard pixel targets required by major platforms—including 1080x1080 for Instagram square posts, 1080x1920 for Stories and Reels, 1280x720 for YouTube, 600x600 for 2-inch passport photos, and 1500x500 for Twitter/X headers—saving you from looking them up.
What happens to transparency when resizing?
If your original image has a transparent background, exporting as PNG or WebP maintains complete transparency. If you choose JPEG, transparent areas are cleanly filled with a solid white matte background.
Can I resize by percentage rather than pixel count?
Yes. You can scale your image proportionally by setting equal percentage values or calculating custom dimensions with the aspect ratio lock enabled.