image resizer
How to use the image resizer
- Drop an image file into the upload area or click to choose one — JPEG, PNG, WebP, and GIF are accepted.
- Choose a resize mode: by exact dimensions (width × height), by percentage of original, or to fit a max bounding box.
- Toggle 'Maintain aspect ratio' to lock proportions, or unlock for stretching.
- Pick output format and quality. Lower quality = smaller file (JPEG/WebP only).
- Click 'Resize' and download the result. Everything runs in your browser — your image never leaves the device.
When to use it
Use whenever you need to fit an image into a CMS upload limit, prepare a thumbnail, generate retina (@2x) sources, or shrink screenshots before sharing. Browser-side resizing is faster and more private than uploading to a web service. Alternative: ImageMagick or Sharp gives you scripting power; this tool is faster for one-off resizes without command-line setup.
Frequently asked questions
- Is my image uploaded to a server?
- No. Resizing happens entirely in your browser using the Canvas API. The image never leaves your device — important when you're working with private screenshots or design comps.
- What's the best size for an OG image?
- 1200 × 630 px (the Facebook/LinkedIn standard) at JPEG quality 85. Twitter accepts the same. The image-resizer can produce that exact size in one step.
- Why does my resized JPEG look fuzzy?
- JPEG compresses by discarding detail. Try quality 90+ or switch to WebP (better quality at the same size). For pixel-perfect logos and icons, use PNG instead.
- Can I batch-resize multiple images?
- Currently single-image only. For batch operations, run a script with Sharp (Node) or ImageMagick (`mogrify -resize 800x600 *.jpg`). Batch resizing is on the roadmap.
- What's the maximum image size?
- Limited by your browser's memory. Most browsers handle 50 MP+ images on desktop; mobile phones may struggle past 25 MP. If the page hangs, try a smaller source.
- Does the resizer preserve EXIF and color profiles?
- EXIF orientation is honored on read but the resized output strips metadata for privacy. ICC color profiles are preserved when the source is sRGB; non-sRGB sources may shift slightly.
Last updated: 2026-04-27