Need to resize an image quickly without installing software? Rekreay's free Image Resizer lets you change any image to exact pixel dimensions — right in your browser, in seconds. No upload to any server, no sign-up, no watermark. Your file never leaves your device.
Whether you're resizing for social media, a website, or a presentation, this tool handles JPG, PNG, and WebP with ease. The optional aspect ratio lock keeps your image from looking stretched.
Free Image Resizer — Resize Online Instantly
Drag & drop your image here
Supports JPG, PNG, WebP — processed 100% in your browserResized Preview
What Is This Image Resizer?
The Rekreay Image Resizer is a free, browser-based tool that lets you change the dimensions of any JPG, PNG, or WebP image to exact pixel sizes — without uploading your file to any server. Everything runs locally inside your browser using the HTML5 Canvas API, so your images stay private and the results are delivered in milliseconds.
Resizing images is one of the most common tasks in digital content creation. You might need to shrink a high-resolution photo down to a specific width for a blog post, scale an image to meet platform requirements for a profile picture or banner, or enlarge a small graphic for print. This tool handles all of these tasks with precision. An aspect ratio lock keeps your image proportional by default — enter a new width and the height adjusts automatically — so you never get distorted or stretched results.
You also choose the output format: JPG for maximum compatibility, PNG for lossless output or images with transparent backgrounds, and WebP for the smallest file sizes on modern websites. The download filename includes the new dimensions, making it easy to identify resized files alongside your originals.
How to Resize an Image — Step by Step
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Upload your image. Click "Choose Image" or drag and drop a JPG, PNG, or WebP file. Nothing is sent to any server.
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Set target dimensions. Enter Width and Height in pixels. The aspect ratio lock is on by default to prevent distortion.
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Choose output format. JPG for photos, PNG for transparency, WebP for best compression.
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Click "Resize Image". Your image is processed instantly using the browser's Canvas API.
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Download. Click Download to save the result. The filename includes the new dimensions.
Frequently Asked Questions
Tips & Best Practices for Image Resizing
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Always resize down, not up. Scaling an image to smaller dimensions maintains sharpness because the browser averages pixels together. Scaling up creates soft, blurry results because pixels must be invented. Whenever possible, start from the largest source image available and resize down to your target size.
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Keep the aspect ratio lock on for most images. Distorted images with stretched or squashed proportions look unprofessional and can harm credibility. Only unlock the aspect ratio if you have a specific reason to use non-proportional dimensions — such as filling a fixed-size container on a web layout.
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Know the standard sizes for common platforms. Blog post featured images typically work best at 1200×628 pixels (a 1.91:1 ratio used by Facebook and Google for social sharing previews). YouTube thumbnails are 1280×720 pixels. Twitter profile photos are 400×400 pixels. LinkedIn banners are 1584×396 pixels. Resizing to these standards ensures your images display correctly wherever they appear.
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Resize before compressing. Compress your image after you have resized it to the final display dimensions. Compressing a 4000×3000 photo and then resizing it down to 800×600 wastes effort — the extra pixels carry data you will discard. Resize first, then use the Image Compressor to reduce the file size of the correctly-sized result.
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Use WebP output for website images. After resizing, saving as WebP produces smaller files than JPG at the same visual quality. For a 800×600 image intended for a blog post, WebP at 85% quality will typically be 30–50% smaller than an equivalent JPG — directly improving your page load speed and Core Web Vitals scores.
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Check pixel density for high-DPI displays. On Retina and high-DPI screens, a 100×100 CSS pixel element may render at 200×200 physical pixels. If your image will appear at 400px wide on screen and you want it sharp on high-DPI displays, resize it to 800px wide and let CSS or HTML scale it down. The browser will use the extra pixels to keep the display crisp.