Let’s Talk
Images / Tool 18 / FREE TO USE

Image Resizer

Resize complete images to custom or social dimensions, keep the original aspect ratio and set PNG print DPI. Preview and download locally.

Use the tool ↓Read the field guide ↗
THE WORKBENCH

Every pixel, at the right size.

IN YOUR BROWSER / PRIVATE INPUT
01 / YOUR INPUT

100% in your browser, files never leave your device.

Your imagesBATCH UPLOAD

No file-count or combined upload-size cap. 40 MB / 24 MP per image. Large queues depend on your device memory. Animated GIF and multipage TIFF use the first frame/page.

Output format
Social preset

The complete image is resized. DPI changes the PNG print-density tag, not detail. Preview the result before downloading.

Metadata is removed by raster re-encoding. HEIC requires native browser support. Converter exports are still images.

02 / YOUR RESULTS

Choose your file and settings. The original stays unchanged.

01 / FROM INPUT TO ACTION

How to use the
Image Resizer

  1. 01

    Choose your images

    Select one or more local images. Files stay in your browser.

  2. 02

    Set the output size

    Choose custom dimensions or a social preset. Enable original aspect ratio to calculate height from width.

  3. 03

    Preview and download

    Inspect the resized image before saving. PNG exports can include a print-density tag.

02IN PRACTICE

Resize the complete image

The complete source is drawn at the requested dimensions. Keeping the original aspect ratio avoids stretching. With the ratio unlocked, an output ratio different from the source will stretch the image.

Social presets set exact output dimensions. Check the preview to ensure the selected ratio suits your source.

For example, a 1600 by 1200 photo has a 4:3 aspect ratio. A width of 800 pixels produces a height of 600 with the ratio enabled. A square preset with the ratio disabled instead stretches that photo into a square; it does not select a smaller part of the source.

For a batch, the same output settings apply to every image. With original aspect ratio enabled, each source keeps its own proportions, so exported heights may differ. Preview each output when mixing portrait and landscape sources.

THE STARTING POINT
Source: 1600 x 1200
Output width: 800
Original aspect ratio: enabled
THE RESULT / NEXT STEP
Output: 800 x 600
The complete image is preserved.
Height follows width when original aspect ratio is enabled.
03UNDERSTAND THE RESULT

DPI is a print-density instruction

A 1200px image tagged at 300 DPI suggests a four-inch print width. Changing DPI does not add detail. Only PNG exports receive the custom print-density tag.

THE QUESTIONS THAT COME NEXT

Image Resizer:
questions, answered.

How do I avoid stretching?

Enable original aspect ratio. Height follows the chosen width using the source dimensions.

Does upscaling add real detail?

No. Canvas resampling interpolates existing pixels. It is not AI super-resolution.

Which exports retain the selected DPI?

PNG exports receive a pHYs print-density chunk. Other formats do not receive a custom DPI tag.

FURTHER READING

The calculations and checks above describe this tool's implementation. Use these primary references for the underlying formats and publishing guidance.

Canvas image resizing ↗ (opens in a new tab)
A USEFUL NEXT STEP

Keep the
work moving.

17

Image Compressor

Reduce the resized file size.

↗16

Image Converter

Choose a different image format.

↗
YOUR NEXT MOVE

Resize your next image.

Set the dimensions, inspect the preview and download the complete image at its new size.

Use the Image Resizer↑
Explore all 41 free tools ↗