Design Tools
Image Resizer
Resize images to exact pixels or percentage. Aspect ratio lock, social media presets, batch processing — all in your browser.
Drop images or click to browse
Will resize to 1200×630 px
Resize without uploading
Drop images, set dimensions or pick a preset, click resize. Output is high-quality bicubic interpolation. Works for JPG, PNG, and WebP. Multiple files at once. Nothing ever uploaded.
Frequently Asked Questions
Will resizing reduce quality?▾
Downsizing (smaller) preserves quality well using high-quality bicubic interpolation. Upsizing (larger) inevitably loses sharpness — pixels have to be invented. For best upsize results, use AI tools (ESRGAN, Real-ESRGAN, browser-based equivalents). Stick to downsize whenever you can.
What's aspect ratio lock?▾
When ON: changing width auto-adjusts height (and vice versa) to maintain the original proportions. When OFF: width and height are independent — you can stretch the image, which usually looks bad. Keep aspect lock ON unless you specifically want to distort.
What are the social media presets?▾
Common dimensions for popular platforms: Instagram square (1080×1080), Twitter/X header (1500×500), LinkedIn banner (1584×396), YouTube thumbnail (1280×720), Facebook cover (1200×630), and OG image for sharing (1200×630). Click a preset to auto-fill width and height.
Should I use percentage or pixels?▾
Pixels for precise targets (social media banners, exact specs from a designer). Percentage for "make it half this size" — often the simplest mental model. Both options below.
What about retina / 2× displays?▾
For retina, save at 2× the display size. A 600×400 hero on retina actually displays 600 CSS pixels but needs 1200×800 actual pixels for sharp rendering. Resize accordingly, then use `width="600"` and `height="400"` HTML attributes (the browser scales the larger image down on non-retina).