DevCoreTools

Image Resizer

Resize PNG, JPEG, and WebP images locally in your browser with aspect-ratio controls, preview, and download options.

Image input

Choose a PNG, JPEG, or WebP file from your device.

Processed locally in your browser Limit local image files. Your input is processed in your browser and is not uploaded or sent to a server. Avoid pasting production secrets, access tokens, private keys, passwords, or sensitive customer data unless you understand the risk.

Resize options

Resize by
Output format

Presets

Resized preview

Resize an image to preview the exported result.

Preview appears after resizing.

Original preview, resized preview, file-size comparison, and download actions stay in this browser session.
Images are processed locally with canvas and are not uploaded.

Image resizing guide

Resize images for web pages, documentation, avatars, and previews while choosing dimensions, format, and compression intentionally.

Width, height, and percentage

Use exact width or height values when a layout has a known slot. Use percentage resizing for quick reductions that keep the original proportions.

Aspect ratio controls

Keeping aspect ratio on prevents stretched images. Turn it off only when you deliberately need a fixed output box.

PNG, JPEG, and WebP

PNG works well for graphics and transparency. JPEG is common for photos. WebP can be smaller when the browser supports exporting it.

Quality settings

JPEG and WebP quality trade visual detail for file size. Lower quality can shrink photos quickly, while higher quality preserves more edges and gradients.

Local canvas processing

The selected image is decoded and resized with browser APIs. The page does not upload files, fetch remote image URLs, or call an external conversion API.

Metadata limitation

Canvas export usually strips EXIF, GPS, camera, color-profile, and orientation metadata. Keep an original copy if that metadata matters.

Keep working

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Frequently asked questions

Does Image Resizer upload my image?

No. The file picker and drag/drop workflow load the image into your browser, then canvas creates the resized export locally.

Which image formats can I resize?

The input accepts PNG, JPEG, and WebP files. Output can keep the original format or export PNG, JPEG, or WebP when the browser supports WebP canvas export.

Why did my resized file get larger?

Changing dimensions, format, transparency, and quality can all affect size. A PNG export of a photo can be larger than the original JPEG or WebP.

What happens to EXIF and metadata?

Most metadata is stripped during canvas export, including EXIF camera data, GPS tags, and orientation tags. This is a browser export limitation.

Can I resize very large images?

Large images are supported within browser memory limits. The tool warns for large files and blocks extremely large pixel counts to avoid locking up the tab.