Image

Image Resizer

Image Resizer changes the resolution (pixel dimensions) of JPG / PNG / GIF / WebP images. Pick width and height in pixels with "Pixel" mode, or scale by a percentage with "Percent" mode.

Drop a JPG / PNG / GIF / WebP file here

JPG / PNG / GIF / WebP supported

All images are processed entirely in your browser and never sent to a server.

You can also paste from the clipboard with Cmd / Ctrl + V.

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About Image Resizer

Image Resizer changes the resolution (pixel dimensions) of JPG / PNG / GIF / WebP images. Pick width and height in pixels with "Pixel" mode, or scale by a percentage with "Percent" mode.

Pixel mode offers "Long edge 1920px", "Long edge 1280px", "Long edge 800px", and "Long edge 400px (thumbnail)" presets. Percent mode offers 25 / 50 / 75 / 150 / 200 presets for one-click resizing. Lock the aspect ratio and skip upscaling to avoid surprises.

All images are processed entirely in your browser — nothing is uploaded to a server. Work confidently with confidential assets or personal photos. Runs entirely in your browser.

How to use

Drop a JPG / PNG / GIF / WebP file into the dropzone, or click to pick one.
Choose "Pixel" or "Percent" mode.
In Pixel mode, type width and height directly or pick a long-edge preset (1920px / 1280px / 800px / 400px). In Percent mode, type a percentage or use the 25 / 50 / 75 / 150 / 200 presets.
Toggle "Lock aspect ratio" or "Skip upscaling" as needed.
When the resulting size and file size are shown, click "Download" to save.

Use cases

Site operators normalizing photos to around 1920px on the long edge to speed up page loads.
Writers and editors resizing blog hero images or social posts to a fixed size.
Shrinking images to 400px on the long edge for use as thumbnails.
Cutting size in half to dodge Slack or Discord attachment limits.
Designers scaling print assets to just the right resolution with percentage input.

Notes

Supports JPG / PNG / GIF / WebP, up to 50 MB per file.
Processes one file at a time (batch resizing is not supported).
Output is capped at 12,000 pixels per side, with percent values constrained to 1–200%.
With "Skip upscaling" enabled, target sizes larger than the original keep the original dimensions.
GIF input keeps only frame 1 — animation is not preserved.

FAQ

Are images uploaded to a server?

No. Resizing happens entirely in your browser, so confidential assets or personal photos are safe to use here.

Can I resize several images at once?

This tool focuses on single-file resizing. For batch reduction use "Image Compressor", or "WebP Converter" if you also want to change format.

When should I use "Skip upscaling"?

It keeps the original dimensions when a target size would enlarge the image. For example, with a "Long edge 1920px" preset, an 800px source stays at 800px — useful for batch jobs that should never lose quality from upscaling.

How does the aspect ratio behave?

With "Lock aspect ratio" on, entering either width or height auto-fills the other to keep the original ratio. With it off, the image stretches to the input dimensions.

Can I change the output format?

The output format matches the input. Use "WebP Converter" if you need WebP, or combine with other tools for further conversion.