Easy Converter

Image Resizer

Resize images online to any width or height — for social media, marketplaces, blog posts or printable formats. The browser-based resizer uses high-quality bicubic interpolation, keeps the aspect ratio by default and lets you process dozens of files in one pass, all without sending a single byte to a remote server.

How to use

  1. 1

    Upload images

    Drop your files into the upload area. Multiple files are supported.

  2. 2

    Set target size

    Enter a width or height in pixels. Keep aspect ratio locked unless you really need to stretch the image.

  3. 3

    Download

    Save the resized images individually or as a single ZIP archive.

Technical details

Resizing changes the number of pixels in an image. Downscaling (making the image smaller) drops data and is essentially lossless from a perceptual point of view if a good interpolation algorithm is used. Upscaling (making the image bigger) cannot create new information and inevitably softens the result unless an AI model invents plausible detail.

The resizer draws each source image onto a canvas of the target dimensions using the browser native scaler, which performs a bicubic / Lanczos-style interpolation depending on the engine. For downscaling by more than 2×, the tool applies a two-pass approach (first halve, then resize to the exact target) to avoid the moiré patterns produced by single-step large reductions.

You can lock the aspect ratio (recommended in 99% of cases) or independently set width and height. The output format defaults to the input format, but you can switch to WEBP or JPG to combine resizing with compression — a common workflow for blog hero images and product cards.

For pixel-perfect work (icons, sprites, screenshots), prefer integer scale factors (50%, 200%) and nearest-neighbour interpolation, which preserves crisp edges and is also available in the advanced options.

Frequently asked questions

Will my image lose quality?
Downscaling is essentially lossless for the human eye. Upscaling will soften details — that is a mathematical limit, not a tool limitation.
Can I batch-resize many photos?
Yes. The tool processes the entire queue with the same settings and gives you a ZIP at the end.
What interpolation algorithm is used?
High-quality bicubic by default, with optional nearest-neighbour for pixel-art workflows.
Does resizing also compress my image?
It re-encodes the file, which often produces a smaller result, but for full control combine it with the dedicated image compressor.
Is there a maximum dimension?
The browser canvas typically supports up to 16,384 px on a side. Beyond that, split the image into tiles.
Reviewed by:Easy Converter Engineering Team

This tool was tested and calibrated by our engineering team. All processing happens locally in your browser — your files and data never leave your device.