FileFlipLocal

Resize image

Resize PNG, JPG or WebP images to a target width and/or height while keeping the aspect ratio. Everything happens locally in your browser.

0 means no limit on this axis.

0 means no limit on this axis.

This tool does not upload your files

The conversion runs entirely in your browser. Your files stay on your device from start to finish, there is no server copy, and nothing is stored once you leave the page. That is true for every tool on FileFlip.

01About this tool

About this tool

Most images are far larger than the place they are going. A photo straight from a phone can be 4000 pixels wide, while a blog post displays it at 800. Resizing before you upload cuts the file size dramatically and makes pages load faster. This runs in your browser, so the original never leaves your device.

02Step by step

How to resize image

  1. 01

    Add your images

    Drop in one file or a whole batch. Every image is resized with the same rules.

  2. 02

    Set a maximum width, height, or both

    Leave an axis at 0 to let it scale freely. Setting only a width is the usual choice: the height follows automatically and the proportions stay correct.

  3. 03

    Decide about enlarging

    By default an image is never scaled up, because enlarging cannot add detail that is not there. Tick the box only if you specifically need larger pixel dimensions.

  4. 04

    Choose the output format and convert

    Keep PNG for graphics, or switch to WebP or JPG to save more space on photographs.

03Good to know

What to watch for

Width and height are a bounding box

The aspect ratio is always preserved. If you give both a width and a height, the image is scaled to fit inside that box, so one dimension will usually come out smaller than the number you typed. Nothing is cropped or stretched.

Sensible target sizes

For a full width photo on a web page, 1600 pixels wide is generous and 1200 is usually plenty. For a thumbnail, 400 is fine. For an email attachment, 1000 keeps the file comfortably small while still looking sharp.

Resizing down also compresses

Fewer pixels means a smaller file even before any quality setting is applied. Resizing is often the single most effective way to shrink an image, more so than lowering quality.

04Questions

Frequently asked

Are my images uploaded anywhere?
No. The conversion runs inside your browser using code that was downloaded to your device. Your file is never sent to us or to anyone else, so there is no copy to store or leak.
Can I crop instead of resize?
Not with this tool. Resizing keeps the whole picture and changes its scale. Cropping removes part of the frame, which is a different operation and is not offered here yet.
Will resizing make the image blurry?
Scaling down is generally very clean. Scaling up cannot invent detail, so an enlarged image will look softer than the original. That is why enlarging is switched off by default.
Can I resize many images to the same width at once?
Yes. Add as many as you like and they all get the same maximum dimensions, each keeping its own aspect ratio.

More image tools

Convert image

Convert PNG, JPG, WebP, AVIF, GIF or BMP images to PNG, JPG, WebP or AVIF. Runs entirely in your browser, so your images never leave your device.

PNG JPG WEBP AVIF GIF BMPOpen

Compress image

Shrink JPG, WebP or AVIF file size by lowering quality, with an optional maximum dimension. Processed in your browser, nothing is uploaded.

PNG JPG WEBP AVIF GIF BMPOpen