image resizer

How to use the image resizer

  1. Drop an image file into the upload area or click to choose one — JPEG, PNG, WebP, and GIF are accepted.
  2. Choose a resize mode: by exact dimensions (width × height), by percentage of original, or to fit a max bounding box.
  3. Toggle 'Maintain aspect ratio' to lock proportions, or unlock for stretching.
  4. Pick output format and quality. Lower quality = smaller file (JPEG/WebP only).
  5. 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.

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Last updated: 2026-04-27