Resize one or many images by pixels or percentage — lock aspect ratio, choose output format, and download instantly. Nothing is uploaded anywhere.
Drop images here
or click to browse — select multiple files for batch resizing
JPGPNGWebPGIFBMPSVGAVIF
Queue — 0 image(s)
Original
File
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Size
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Dimensions
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Resize Mode
Width
Height
×
Lock aspect ratio
%
Quick Presets
Output Format
Quality
185High100
PNG is lossless — quality setting has no effect
Output
Load an image to begin
Processing…
Preview will appear here
Original
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Output
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Awaiting resize
About this image resizer
This free Image Resizer changes the dimensions of your photos and graphics by exact pixels or by percentage, with an optional aspect-ratio lock that keeps everything in proportion — all instantly, right in your browser.
Resizing an image means changing how many pixels wide and tall it is. Drop in a JPG, PNG, WebP, GIF or other common format and the tool reads its original dimensions so you can scale down a huge camera photo to a sensible size, or set an exact width and height to fit a template. Switch to percentage mode when you simply want something half or a quarter of its current size without doing the maths. The aspect-ratio lock ties width and height together so your picture never ends up stretched or squashed, while a live preview and an output-size estimate show the result before you commit. Quick presets cover common targets like 1920×1080 and 512×512, and you can choose to keep the original format or convert to JPEG, PNG or WebP on the way out. People use it to:
Shrink large camera or phone photos to upload faster on the web or email
Hit exact pixel dimensions required by a website, marketplace, or print template
Create square thumbnails and avatars at sizes like 512×512 or 256×256
Batch-resize a whole folder of images to one size and download them as a ZIP
Everything runs locally on your device using the HTML canvas — your images are never uploaded to any server, so even sensitive or unpublished photos stay completely private. Nothing leaves your browser, and there is no sign-up, watermark, or file-size limit to worry about.
How to use
Drop one or multiple images onto the upload zone, or click to browse — JPG, PNG, WebP, GIF and more are supported.
Choose a resize mode: enter an exact width and height in pixels, or switch to percentage to scale relative to the original.
Keep the aspect-ratio lock on so dimensions stay proportional, or turn it off to set width and height independently.
Pick an output format — keep the original or convert to JPEG, PNG or WebP — and adjust quality if needed, watching the live preview.
Download the single resized file, or click "Download All as ZIP" to grab the entire batch at once.
FAQ
Downscaling always preserves quality. Upscaling small sources can soften edges — use the dedicated AI Upscaler first if you need more pixels.
Yes — select multiple files, apply one set of dimensions, and Download All as a single ZIP archive.
PNG for transparency and UI graphics; JPEG for photos; WebP for the smallest modern files. Dimensions are identical across formats.
Use pixel mode when you need an exact width and height, such as fitting a 1200-pixel-wide content area or a 512×512 avatar slot. Use percentage mode when you just want the image proportionally larger or smaller — for example 50 percent halves both dimensions — without working out the exact numbers yourself. Both modes produce the same kind of result; they are simply two ways of describing the target size.
Leave the "Lock aspect ratio" toggle switched on. With it enabled, typing a new width automatically updates the height to keep the original proportions, so your image is never stretched or squashed. Turn the lock off only when you deliberately want to set width and height independently, accepting that the picture may look distorted. Percentage mode always preserves the aspect ratio because it scales both dimensions equally.
It can. When you set dimensions larger than the original, the browser has to invent new pixels by interpolation, which softens fine detail and edges. Downscaling to a smaller size keeps quality sharp, so resizing down is always safe. If you genuinely need more pixels from a small source, run it through the dedicated Image Upscaler first, then resize the larger result here.
You can keep the original format or convert the output to JPEG, PNG or WebP. PNG stays lossless and preserves transparency, JPEG and WebP let you trade quality for a smaller file using the quality slider, and WebP usually produces the smallest files of all. The pixel dimensions of the resized image are identical no matter which format you pick — only the file size and compression differ.