Free Image Resizer — Resize Images Online
Resize JPG, PNG, WebP and GIF images right in your browser — no upload, no sign-up, no watermark.
Your files never leave your device. All processing happens in your browser.
How to Resize an Image
- Add your image. Drag a file onto the box above or click to browse. It loads instantly from your device — nothing is uploaded.
- Set the new size. Type a width or height in pixels. With Lock aspect ratio enabled (the default), the other dimension adjusts automatically so the image never looks stretched.
- Or scale by percent. Prefer a relative size? Enter a percentage or tap the 25%, 50% or 75% presets to shrink the image proportionally.
- Choose the output. Pick JPG, PNG or WebP. For JPG and WebP, drag the quality slider to balance sharpness against file size — the estimated size updates live.
- Download. Check the preview, then click Download to save the resized image with a descriptive name like
photo-resized-800x600.jpg.
Supported Formats & Limits
- Input: JPG/JPEG, PNG, WebP and GIF. Animated GIFs are flattened to their first still frame.
- Output: JPG, PNG or WebP. PNG preserves transparency; JPG fills transparent areas with white; WebP is typically the smallest at a comparable quality.
- Quality: the 0–100 slider applies to JPG and WebP. PNG is lossless, so it ignores the slider.
- Size: no upload limit because processing is local. Files over 50 MB show a warning; very large images depend on your device’s available memory.
- Orientation: EXIF rotation from phone cameras is corrected automatically, so portraits don’t come out sideways.
Frequently Asked Questions
Are my images uploaded to a server?
No. Every image you open is processed entirely inside your browser using the Canvas API. Your files are never sent anywhere — you can open your browser’s Network panel and watch: no upload request is made. This also means the tool keeps working even if you go offline after the page loads.
Will resizing reduce image quality?
Making an image smaller is generally clean and barely noticeable. Making an image larger than its original size cannot add detail, so it will look softer. For JPG and WebP you also control a quality slider: higher keeps more detail at a larger file size, lower saves space at the cost of sharpness.
Which formats can I use?
You can open JPG, PNG, WebP and GIF images, and export to JPG, PNG or WebP. PNG keeps transparency; JPG does not (transparent areas become white); WebP usually gives the smallest file at a given quality.
What happens to animated GIFs?
A GIF opens fine, but it is flattened to a single still frame because the Canvas API works one frame at a time. If you need to keep the animation, resizing a GIF is not the right tool.
Is there a file size limit?
There is no server limit because nothing is uploaded. The only practical limit is your device’s memory. Files above 50 MB trigger a warning, and very large images may be slow on phones or low-memory machines.
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