Resize Image
Change your screenshot dimensions by pixels or percentage. Perfect for avatars, thumbnails and wallpapers.
拖拽图片到此处 或点击选择
Supports PNG, JPG, WebP · Max 20MB
How to Use the Image Resizer
- Upload — Drag a screenshot onto the drop zone or click to browse. PNG, JPG, and WebP files up to 20MB are supported.
- Set exact pixels — Type a width or height. With "Keep aspect ratio" checked (the default), the other dimension updates automatically so nothing gets stretched.
- Or pick a platform preset — The preset menu already knows the official dimensions: Steam capsules (231×87, 460×215, 616×353, 920×430), Discord emoji at 128×128, Twitch emotes at 112×112, YouTube thumbnails at 1280×720 and more. Choosing one fills in both values and unlocks the aspect ratio, because platform uploads require the exact size.
- Or scale by percentage — Drag the slider (5–200%) or type a precise percentage. The new dimensions and scale factor update live above the preview.
- Download — Pick PNG, JPEG, or WebP output and hit Download. The before/after preview shows exactly what you'll get.
Resize Screenshots for Discord, Steam, and Avatars
Every platform wants different dimensions. Discord avatars look sharpest at 128×128, Steam library artwork expects 460×215, and forum signatures often cap height at 150px. Instead of trial and error, type the target width here and let the resizer preserve your proportions. Shrinking a 4K capture to 1920px wide also makes uploads dramatically faster — most platforms re-compress big images anyway, so resizing first costs you nothing and keeps you in control of the final look.
| Platform | Asset | Pixels |
|---|---|---|
| Steam | Small capsule | 231 × 87 |
| Steam | Main capsule | 460 × 215 |
| Steam | Header capsule | 920 × 430 |
| Steam | Library capsule | 600 × 900 |
| Steam | Community icon | 184 × 184 |
| Discord | Emoji / avatar | 128 × 128 |
| Twitch | Emote | 112 × 112 |
| Roblox | Decal | 256 × 256 |
| itch.io | Cover image | 630 × 500 |
| YouTube | Thumbnail | 1280 × 720 |
Does Resizing Hurt Image Quality?
Scaling down almost always looks great: pixels are blended together, so text and edges stay crisp. Enlarging beyond 100% is different — the browser has to invent pixels, which softens detail. If you must upscale, stay under roughly 150% and export as PNG to avoid adding compression artifacts on top.
Frequently Asked Questions
Can I stretch an image to exact dimensions?
Yes — uncheck "Keep aspect ratio" and set width and height independently. Just know that mismatched ratios will visibly stretch or squash the picture.
Why does my upscaled image look blurry?
Upscaling can't recreate detail that was never captured. For sharp results, scale down, or keep enlargements modest (under about 150%).
Is my screenshot uploaded to a server?
No — resizing runs entirely in your browser using the Canvas API. The tool is free, needs no account, and your image never leaves your device.
Do the size presets prevent stretching?
No. Presets unlock the aspect ratio on purpose, because platforms reject anything that is not the exact size. If your artwork has a different ratio, crop it to that ratio first, then resize — otherwise it will be stretched.