Free Image Rounded Corners Tool - Add Border Radius Online

A Once you save and close the file, those rounded corners are permanent. The tool doesn't keep a backup. If you need flexibility later, save two versions: one with rounded corners and the original. Some photo editors can reverse transparency, but that adds steps. Best practice is to process a copy, leaving your original untouched.

A It shouldn't crash, but you might notice some lag. The tool processes everything locally in your browser, so a 20MB image takes more work than a 2MB one. Give it a second or two after moving the slider for the preview to update. For the smoothest experience, crop giant photos down before uploading. No files ever leave your machine, so memory is your only bottleneck.

A Yes. Every pixel stays on your machine. The tool runs entirely in your browser using JavaScript. No image gets sent to our server or any third party. This means your private photos, client work, or sensitive screenshots never leave your device. Nifty for web developers who need to round corners on prototype assets without worrying about data leaks. You can even disconnect from WiFi after the page loads.

A Not really. Rounding corners adds transparency pixels, which can actually increase the file size slightly. If you're optimizing for web performance, use a compression tool after this one. For a typical 1MB photo, you'll see maybe 10-20KB difference either way. Social media managers should round first, then run images through TinyPNG for faster page loads.

A Your resolution stays completely intact, and your color profile doesn't get touched. The tool only modifies the alpha channel, which controls transparency. So a 6000x4000px photo with an Adobe RGB profile keeps every pixel and color exactly as-is. The output is a PNG at the same dimensions. Just remember that PNG doesn't support CMYK, so if you're prepping for print, convert to sRGB and export a JPEG for web use after rounding.

A Yes, as long as the logo sits inside the image content. Rounded corners only cut into the outermost pixels, creating a transparent border curve. If your logo is a separate overlay with its own transparent background, drop it in after rounding, not before. Designers often batch-process photos this way for client presentations. For a 150px corner radius on a 2000px canvas, any content closer than 150px from the edge will get clipped. Keep your logo at least 10% inset, and you won't notice a thing.

A Transparency renders consistently across devices, but corner radii can appear smaller on high-density screens like phones. A 24px radius on a 4K monitor looks roughly half that size on a 320px-wide phone preview. For e-commerce product shots, go with 8-12% of the image width for a visible curve that won't get lost on mobile thumbnails. Test at 50% zoom in your browser to simulate a phone view before exporting.

A It runs fine in any modern mobile browser. Tap the upload area, pick a photo from your camera roll, then drag the radius slider with your thumb. On a 12MP iPhone shot, expect the preview to update in about a second. Just avoid Safari's Low Power Mode, which throttles JavaScript and makes the slider feel sticky.

A This single-file tool doesn't process fifty photos simultaneously. You have to handle them one by one. Drop your first image, set the corner radius to 40px, and hit download. Then repeat the process for your next asset. Designers working on a large client project usually complete ten files in about two minutes. If you need a quick alternative for bulk folders, write a quick Photoshop action instead.

A They'll look completely smooth because the tool uses browser canvas antialiasing to blend the curved pixels into the background. You won't see any staircase steps on your 500x500 pixel graphic, even if you zoom in close. The processor creates a clean vector-like edge before exporting your final PNG file. Try setting a subtle 10px radius on a sharp thumbnail to see how clean the curve renders.