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Three Ways to Resize
Our image resizer gives you three flexible methods to get the exact output you need:
1. Custom Dimensions (Pixels)
Enter an exact width and height in pixels. With aspect ratio lock enabled (the default), changing one value automatically adjusts the other to keep your image from stretching or squishing.
2. Percentage Scaling
Scale your image by a percentage — 25%, 50%, 75%, 150%, 200%, or any custom value. This is the fastest way to make an image smaller or larger without worrying about specific pixel counts.
3. Social Media Presets
One-click presets for the exact dimensions each platform requires:
- Instagram — Post (1080×1080), Story (1080×1920), Landscape (1080×566)
- Twitter / X — Post (1200×675), Header (1500×500)
- Facebook — Post (1200×630), Cover (820×312), Profile (170×170)
- LinkedIn — Post (1200×627), Cover (1584×396)
- YouTube — Thumbnail (1280×720), Channel Art (2560×1440)
- Pinterest — Pin (1000×1500)
Pro tip: If your image's aspect ratio doesn't match the preset, the tool will fit and crop intelligently. You can also unlock the aspect ratio to stretch to exact dimensions if needed.
How to Use
- Open the Image Resizer
- Drop an image or click to upload (JPG, PNG, WebP, GIF, BMP, SVG)
- Choose your resize method: custom pixels, percentage, or a social media preset
- Adjust the width, height, or percentage as needed
- Choose your output format (JPG, PNG, or WebP) and quality
- Click "Resize & Download"
When Do You Need to Resize?
- Social media posts — Each platform has ideal image dimensions. Using the right size means your images display without cropping or compression artifacts.
- Email attachments — Shrink photos before sending to avoid bounced emails or slow loading.
- Website optimization — Oversized images slow down page load times. Resize to the actual display dimensions for faster websites.
- Print preparation — Scale images to the exact print dimensions at 300 DPI for sharp output.
- App and form submissions — Many online forms and applications require specific image dimensions or maximum file sizes.
- Thumbnails — Create consistent thumbnail sizes for product catalogs, galleries, or video previews.
Output Options
After resizing, you can choose your output format:
- JPG — Best for photos. Smaller file size with adjustable quality (1–100%).
- PNG — Best for graphics, screenshots, and images with transparency. Lossless quality but larger files.
- WebP — Modern format with excellent compression. Great for web use. Smaller than JPG at similar quality.
Aspect Ratio Explained
Aspect ratio is the proportional relationship between an image's width and height. Common ratios include:
- 1:1 — Square. Instagram posts, profile pictures.
- 16:9 — Widescreen. YouTube videos, presentations, desktop wallpapers.
- 4:3 — Classic photo ratio. Many phone cameras default to this.
- 9:16 — Vertical/portrait. Instagram Stories, TikTok, Reels.
- 3:2 — Standard DSLR photo ratio.
When the aspect ratio lock is on, changing one dimension automatically recalculates the other. This prevents distortion. Unlock it only when you intentionally want to stretch or squish the image.
Resize vs. Compress
Resizing changes the pixel dimensions of an image (width × height). Compressing reduces the file size by adjusting quality without changing dimensions. Need both? Resize first, then use our Image Compressor for maximum file size reduction.
Privacy
Your images are processed entirely in your browser using the HTML5 Canvas API. Nothing is uploaded to any server. No data is stored, no cookies are set. It's just you, your image, and JavaScript.
Ready to resize your images?
Pick a preset or enter custom dimensions. Done in seconds.