Resize images online for free
Change the width and height of one or several images by exact pixels or percentage, preserve proportions when needed, and choose the output format.
or drop images here
Up to 20 JPG, PNG, WebP or GIF images · 50 MB each
Images are resized in your browser and never uploaded
Precise image resizing without uploading
Animated GIFs can be resized here too: with the output format left on Same as original, the result stays a GIF and keeps its animation and transparency.
Pixels or percentage
Enter exact output dimensions or scale every selected image by the same percentage.
Batch output controls
Resize multiple images together, keep their aspect ratios, and choose PNG, JPG, or WebP for the result.
Local browser processing
Images are decoded, resized, and exported on your device without being uploaded to an ImageNow server.
How it works
- Choose one or more images, or drag them into the tool.
- Enter a width and height in pixels, or choose a percentage. Check each image’s expected dimensions before resizing.
- Keep the aspect ratio to avoid stretching. The original format is kept by default; change Output format if needed.
- Click Resize image, then check the actual dimensions and file size. Download one image, or use Download all for a ZIP of the batch.
Resize an image by exact dimensions or scale
Pixel mode is useful when a website, form, profile, or layout requires a specific width and height. Percentage mode is convenient when every image should become proportionally smaller or larger. The displayed result dimensions let you check the calculation before exporting.
Keep the aspect ratio to avoid distortion
An image's aspect ratio is the relationship between its width and height. With one image, changing either dimension updates the other proportionally. With a batch, width and height become maximum bounds and each image fits inside them proportionally. If you unlock it, the image is stretched to the exact width and height; this tool does not crop the image or add padding.
Choose PNG, JPG, or WebP output
The resizer accepts static JPG, PNG and WebP images, plus animated GIFs. With Same as original, GIF keeps its animation, frame timing, repeats and transparency. PNG and WebP can keep transparent areas; JPG fills them with white. Every output is newly encoded, so original image metadata is not retained. GIF converted to JPG, PNG or WebP becomes a still image of its first frame.
Resizing changes pixels, not just file size
Downscaling removes pixel detail and usually reduces file size. Upscaling creates more pixels by interpolation but cannot recover detail that was absent from the original. If your only goal is a smaller file at the same dimensions, use an image compressor instead.
Frequently asked questions
How do I resize an image online?
Choose an image, enter pixel dimensions or a percentage, and check the expected size. Click Resize image to create the result, then preview and download it. The output keeps the original format unless you change Output format.
Can I resize multiple images at once?
Yes. Add several supported images and apply one sizing mode and output configuration to the batch. Each image keeps its own calculated result dimensions.
How do I resize without stretching the image?
Leave the aspect-ratio lock enabled. For one image, changing either dimension updates the other. For a batch, width and height become maximum bounds, so every image fits without stretching.
Can I make an image larger?
Yes, but upscaling interpolates existing pixels rather than recovering new detail. A modest increase may look acceptable, while a large increase can appear soft or blocky.
Does resizing reduce image file size?
Smaller pixel dimensions often reduce the file size, but the exact result also depends on the output format, transparency, and image content.
Which output format should I choose?
The original format is kept by default. In Output format, choose PNG for transparency or sharp graphics, JPG for photos and broad compatibility, or WebP for efficient files in modern browsers and apps.
Is resizing the same as compressing an image?
No. Resizing changes the pixel dimensions. Compression changes how image data is stored and may keep the original width and height. Either operation can reduce file size, but they solve different constraints.
Are my images uploaded to ImageNow?
No. Decoding, resizing, and export run locally in your browser, so the selected files do not need to be uploaded to an ImageNow server. Free tools do not upload your files. AI features that require server processing upload them to our servers.