Are my images uploaded to a server when resizing?

No. All processing happens locally in your browser using the HTML5 Canvas API. Images are never uploaded, stored, or transmitted to any server.

What does the aspect ratio lock do?

When locked, changing width auto-updates height to maintain original proportions (and vice versa). Unlock to stretch an image to non-proportional dimensions.

What quality setting should I use for web images?

80–90 quality for JPG and WebP gives an excellent balance between visual fidelity and file size. PNG is lossless so quality does not apply.

Can I resize images to a specific file size?

This tool resizes by pixel dimensions. Adjust quality and dimensions to approach a target file size — the stats panel shows estimated output size.

What is the maximum image size I can resize?

There is no hard limit imposed by the tool. Very large images (20 MB+ or 8000+ pixels) may be slow depending on device memory. All processing is local with no server-side limits.

Which output format should I choose — JPG, PNG, or WebP?

Choose JPG for photos without transparency. Choose PNG for graphics requiring transparent backgrounds. Choose WebP for web delivery — 25–35% smaller than JPG at equivalent quality.

Does percentage mode maintain the aspect ratio?

Yes. Percentage mode always scales both dimensions by the same factor, automatically preserving aspect ratio. 50% halves both width and height; 200% doubles both.

Resize Images Online — Pixels, Percentage & Presets

Resize JPG, PNG, or WebP images by exact pixel dimensions or percentage scale — with aspect ratio lock, built-in presets, and quality control. Everything runs in your browser, so your photos stay completely private and never leave your device.

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Drop image here or click to upload

JPG, PNG, WebP supported

Width (px)

Height (px)

Presets

Output Format

Quality

Quality90%

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Upload an image and click Resize to see the output here.

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Original

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Resized

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Size Change

How to Resize an Image Online

Drop your JPG, PNG, or WebP image onto the upload zone, or click to browse files.
Choose By Pixel to enter exact width and height, or By Percentage to scale proportionally.
Use a Preset for common sizes: HD (1920×1080), Square (1080×1080), Thumbnail (150×150), Web (800×600), or 4K (3840×2160).
Toggle the lock icon to keep or break the original aspect ratio.
Select an output format (JPG, PNG, or WebP) and adjust quality.
Click Resize Image, then Download or Copy to clipboard.

Key Features

Resize by pixels or percentage — enter exact dimensions or scale proportionally in one click.
Aspect ratio lock — prevent distortion when changing width or height independently.
Built-in presets — HD, 4K, Square, Thumbnail, and Web presets for instant setup.
JPG, PNG, WebP output — choose the best format for your use case.
Quality slider — balance file size and visual fidelity for lossy formats.
Privacy-first — all resizing happens in your browser; images are never uploaded.
Size stats — see original size, resized size, and percentage change after resizing.

Use Cases

Resize Images to 1920×1080 for HD Backgrounds

Need a wallpaper or hero image at exactly 1920×1080 pixels? Select the HD preset, click Resize, and download in seconds. The aspect ratio lock ensures no stretching if your source image is a different shape.

Scale Down Product Photos for E-commerce Listings

Online stores like Shopify, WooCommerce, and Etsy require product images within specific pixel limits. Use the pixel mode to hit those exact dimensions, then export as WebP or JPG for the smallest possible file size without visible quality loss.

Create Thumbnails at 150×150 for Blogs and Directories

WordPress and many blog platforms auto-generate thumbnails, but pre-resizing to 150×150 before upload gives you full control over cropping and quality. The Square preset makes this a one-click operation.

Reduce Image File Size for Faster Website Loading

Oversized images are a leading cause of slow Core Web Vitals scores. Resizing images to their actual display size — rather than relying on CSS to shrink them — reduces bytes transferred and dramatically improves Largest Contentful Paint (LCP).

Upscale a Small Graphic for Presentations

Use percentage mode and set 200% to double a small image for use in presentations or print materials. Note that upscaling cannot add new pixel detail — always start from the highest resolution original available.

FAQ's

No. This tool uses the HTML5 Canvas API to process your images entirely in your browser. Nothing is uploaded, stored, or sent to any server. You can disconnect from the internet after the page loads and the tool will still work.

Downscaling (reducing dimensions) preserves quality well, especially with the quality slider at 85–95. Upscaling beyond the original dimensions can introduce blurriness because no new pixel data is created. Always resize from the highest resolution original you have.

When the lock is ON (default), changing the width automatically updates the height to maintain the original proportions, and vice versa. Turn the lock OFF if you need non-proportional dimensions for a specific design requirement.

For JPG and WebP, 80–90 quality provides an excellent balance between visual quality and file size. Values below 70 may show visible artefacts. PNG is lossless, so quality does not apply — file size is determined by image complexity alone.

This tool resizes by pixel dimensions rather than target file size. To approach a specific file size, reduce the quality slider or shrink the dimensions. The stats panel shows the output file size so you can iterate.

There is no hard limit imposed by the tool, but very large images (20 MB+ or 8000+ pixels wide) may be slow to process depending on your device memory. All processing is local — no server-side size limits apply.

Choose JPG for photographs where transparency is not needed. Choose PNG for graphics, logos, or images that require transparent backgrounds. Choose WebP for web delivery — it is 25–35% smaller than JPG at equivalent quality and is supported by all modern browsers.

Yes. Percentage mode always scales both dimensions by the same factor, so the aspect ratio is automatically preserved. Setting 50% halves both width and height; 200% doubles both.