Rounded Corners

Rounded Corners is a lightweight, powerful in-browser photo editor. It uses the Canvas 2D API and CSS filter pipeline to apply your edits in real-time, without ever sending your image to a server. Every setting has a live preview so you can iterate quickly and land on a look you love without saving intermediate copies. When you're happy, one click downloads a high-quality PNG or JPG in the exact resolution you need. There's no signup, no watermark on the output, and no daily limit on how many edits you can produce.

From subtle tweaks like adding a soft border, rounded corners or a drop shadow, to bigger transformations like heavy Gaussian blur, mosaic pixelation, or dramatic reflections and vintage filters, this tool gives you dial-in-perfect control. Adjust radius, intensity, angle, colour and opacity independently. Combine multiple effects in a single export. Stack a shadow under a border under rounded corners and see the whole thing update instantly with GPU-accelerated rendering.

Popular use cases include: building thumbnails for YouTube videos and blog posts, adding branded borders to portfolio images, softening backgrounds behind product shots for e-commerce catalogues, obscuring faces or licence plates in screenshots before you share them publicly, creating vintage or grainy looks for social media aesthetics, and adding polish to slide-deck screenshots for professional presentations, marketing pitches or investor decks.

All exports are high-quality PNG (for transparency) or JPG (for smaller files) at your source resolution. You can undo any change by simply reloading the page — nothing is ever saved unless you click Download. Because everything runs in your browser, your images never touch our servers and you never wait in a processing queue. It's the perfect quick editor for anyone who doesn't want to open Photoshop for a small tweak, whether you're a marketer, blogger, student, developer or just someone with a fun photo to fix.