Image Resizer
An image resizer changes the pixel dimensions of a picture — making a 4000-pixel photo small enough for a website, an avatar or an email. FreeToolsKit's resizer works by exact pixels or percentage, keeps the aspect ratio locked so nothing stretches, and exports PNG, JPEG or WebP. Your image never leaves your device; resizing happens in your browser.
Last updated: October 20, 2026
Drag and drop files here, or click to browse
One image — JPG, PNG, WebP, GIF or BMP
Your files never leave your device — processing happens in your browser.
Key takeaways
- Resize by target pixels with the aspect ratio locked, or by a simple percentage slider.
- Presets cover common sizes — 1920, 1280, 1080, 800 and 512 pixels wide.
- Output can be PNG, JPEG or WebP, and the result's dimensions and file size are shown before download.
- Enlarging beyond the original size shows an upscale warning, because upscaling cannot add real detail.
How do you resize an image?
- Drop your image onto the panel or click to browse — its original dimensions appear.
- Choose pixel mode and type a target width (height follows automatically), or use percentage mode.
- Or pick a preset width if you just need a standard size.
- Pick an output format — WebP for smallest files, PNG for transparency, JPEG for photos.
- Press download to save the resized image shown in the preview.
What is the Image Resizer used for?
- Shrinking a phone photo to 1080px wide before uploading it to a website or blog.
- Making an avatar or profile picture exactly the pixel size a platform asks for.
- Reducing a screenshot so it fits a document or slide without overflowing.
- Preparing marketplace or shop images to a consistent width across a catalogue.
- Creating a small thumbnail version of an image for a gallery or index page.
Frequently asked questions
Is my image uploaded to a server?
No. The image is drawn onto a browser canvas at the new size and read back as a file — all on your device. Nothing is uploaded, stored or seen by anyone.
Why do I get an upscale warning?
Enlarging an image cannot invent detail that was never captured — the browser stretches the existing pixels, which usually looks soft or blocky. The warning appears whenever a target dimension exceeds the original so you can decide with open eyes.
Which format should I choose?
JPEG suits photographs and gives small files but no transparency. WebP is usually smaller still and supports transparency. PNG is best for graphics, logos and screenshots where crisp edges and transparency matter.
Will resizing keep my image from looking stretched?
Yes. Aspect ratio lock is always on: you set the width and the height is calculated from the original proportions (or vice versa), so the image can never be squashed or stretched.
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