Dimensions and bytes differ
Pixel dimensions describe the image grid. File size also depends on format, content, and quality.
Resize & Prepare · Free, no signup
Resize an image precisely
Change pixels, not just file size. Lock the aspect ratio or set an exact canvas and output format.
- No watermark
- Delete immediately
- Real quality controls
Drop an image here
or paste from your clipboard
Processed securely on our server. Files auto-delete within four hours.
Three clean steps
Get the result, then get on with it
The workspace keeps choices close to the file. Explanations stay down here.
- Choose images or drop them into the workspace.
- Set the result you need.
- Process, review, and download.
Worth knowing
Resize an image precisely, with the tradeoffs visible
High-quality resampling
Downscaling uses libvips Lanczos sampling and applies orientation before calculating the result.
Solve the whole problem
Useful guides for this tool
01
How to compress an image to an exact file-size limit
Why exact KB compression needs quality search, validation, and sometimes careful dimension reduction.
Read and use the tool ↗02The best image format for the web
Choose image formats by content, compatibility, alpha, animation, and performance rather than fashion.
Read and use the tool ↗03How image compression works
Understand lossless coding, perceptual loss, quality settings, dimensions, and why outputs differ.
Read and use the tool ↗04Image file size vs pixel dimensions
Understand KB, MB, width, height, resolution, and why changing one does not precisely set the other.
Read and use the tool ↗05HEIC explained and when to convert it
Understand why iPhones use HEIC, what it saves, and when a JPG copy is the practical choice.
Read and use the tool ↗