Is my image uploaded to a server?

No. The resize runs on an HTML canvas inside your browser tab. The file never leaves your device, so it is safe for private photos, screenshots of internal dashboards, and client work.

Does resizing lose quality?

Making an image smaller keeps it sharp. Making it larger stretches the pixels you already have, so it looks softer. For upscaling, start from the largest original you have.

What is the maximum file size?

There is no upload limit because there is no upload. The practical limit is your device memory — images up to about 8000 × 8000 px work on most laptops and phones.

Which format should I pick?

Use JPG for photos, PNG for logos and screenshots with sharp edges or transparency, and WebP when you want the smallest file for a website.

Image Resizer

Set an exact pixel width and height, or scale by percentage, and download the resized file. Lock the aspect ratio to avoid stretching, switch the output format to PNG, JPG, or WebP, and watch the file size update live before you download. The whole resize runs on a canvas in your browser, so your photo is never uploaded to a server — no queue, no watermark, no upload limit.

Drop an image to resize

or click to browse — you can also paste with Ctrl/Cmd+V

PNG, JPG, WebP, GIF, AVIF, or SVG — nothing is uploaded

Your image is processed in this browser tab with the Canvas API. It is never uploaded, stored, or sent to a server.

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How to Use Image Resizer

Drop, paste, or select the image you want to resize.
Enter a new width or height in pixels, or press a percentage preset.
Keep 'Lock aspect ratio' on so the image does not stretch.
Choose PNG, JPG, or WebP output and set the quality.
Press Download resized image.

Frequently Asked Questions

Is my image uploaded to a server?: No. The resize runs on an HTML canvas inside your browser tab. The file never leaves your device, so it is safe for private photos, screenshots of internal dashboards, and client work.
Does resizing lose quality?: Making an image smaller keeps it sharp. Making it larger stretches the pixels you already have, so it looks softer. For upscaling, start from the largest original you have.
What is the maximum file size?: There is no upload limit because there is no upload. The practical limit is your device memory — images up to about 8000 × 8000 px work on most laptops and phones.
Which format should I pick?: Use JPG for photos, PNG for logos and screenshots with sharp edges or transparency, and WebP when you want the smallest file for a website.

Guides for this tool

Use a focused example when you need platform-specific syntax or a repeatable document workflow.

How to Control Image Size in Markdown

Learn practical ways to set Markdown image dimensions with HTML, CSS, and renderer-specific options.

About Image Resizer

Resize an image to any width and height in your browser. Free online image resizer with aspect-ratio lock, percentage presets, and PNG, JPG, or WebP output. This tool runs entirely in your browser, so your content is not sent to a server. MarkdownMe provides free, fast, and reliable Markdown tools for developers, writers, and anyone who works with Markdown.