Resize Image Online
Resize an image by exact pixels or percentage, preserve its aspect ratio, preview locally and download the result. Processing takes place locally in your bro…
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What Resize Image Online does
Resize an image by exact pixels or percentage, preserve its aspect ratio and download the processed result without sending the image to an application server.
Worked example
2400 × 1600 image resized to 1200 px wide with aspect ratio locked
1200 × 800 output
How the result is produced
The browser decodes the image, draws it to a canvas at the requested dimensions and creates a new downloadable file. Reducing dimensions discards pixels; enlarging estimates new pixels and cannot recreate missing detail.
Useful workflows
- Prepare article and product images for the web
- Create a smaller email or document attachment
- Match a required pixel dimension while avoiding distortion
Important limits
- Upscaling increases dimensions but not real detail.
- Very large images can exceed available mobile memory.
- Metadata and color-profile handling can differ between browser export formats.
Frequently asked questions
Should I resize by pixels or percentage?
Use pixels when a platform specifies exact dimensions; use percentage for a quick proportional reduction.
Why does my file size not fall by the same percentage?
File size also depends on format, compression, image complexity and metadata—not only width and height.
Can enlarging an image restore missing detail?
No. Upscaling estimates new pixels and can smooth edges, but it cannot reconstruct detail that was not present in the source.
Processing takes place locally in your browser.