How to Resize an Image to 100×100 Pixels
100×100 pixels is a common size for forum avatars, small profile photos, and app icons. It is a square format that loads fast and displays well at small sizes. This guide walks through resizing any image to exactly 100×100 pixels in seconds using only your browser — no software installation needed.
Quick Answer
100×100 pixels is a common size for forum avatars, small profile photos, and app icons. It is a square format that loads fast and displays well at small sizes.
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Your images stay on your device. Nothing is uploaded to any server.
Step-by-Step Guide
4 steps · takes under 1 minute
Crop to a square first (optional)
If your image is not square, crop it to a square aspect ratio using the Crop tool before resizing. Skipping this step will stretch the image to fit 100×100.
Upload your image
Open the Resize to 100×100 tool and drag or click to upload your JPG, PNG, WebP or GIF file.
Click Resize
Click the 'Resize to 100×100' button. The Canvas API instantly scales your image to exactly 100×100 pixels.
Download PNG
Download the 100×100 PNG file. It is ready to upload as a forum avatar, app icon, or profile photo.
100% Private — Zero Uploads
ImgToolkit runs entirely in your browser using the Canvas API. Your images are never sent to a server, never stored in the cloud, and never seen by anyone else. This makes it safe for sensitive documents, client work, medical imagery, and confidential screenshots.
Pro tip
Use 75–85% quality for web images — you get 60–80% smaller files with no visible difference at normal screen sizes.
Format & File Size Comparison
Same 1080×1080px photo processed four ways
| Format | Quality | File Size | Notes |
|---|---|---|---|
| PNG (original) | Perfect | 4.2 MB | No compression — too large for web |
| Compressed PNG | Visually identical | 1.1 MB | −74% — transparency preserved |
| JPG (85% quality) | Excellent | 310 KB | −93% · Best for photos |
| WebP (85%)BEST | Excellent | 205 KB | −95% · Recommended for web |
Based on a 1080×1080px photo. Results vary by image content and complexity.
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Frequently Asked Questions
3 questions answered