Resize photos to exact pixels, a percentage, or presets like passport & signature size. Your images never leave this device.
PDFZero's image resizer changes the dimensions of JPG, PNG and WebP images directly inside your browser — no upload, no signup, no watermark. Enter exact pixel dimensions, scale by a percentage, or pick a ready-made preset for passport photos, exam-portal photos and signatures, Instagram, YouTube thumbnails and more. Because everything runs locally on your device, it's safe to resize ID photos and other personal images.
Application portals are strict about photo dimensions: a typical passport-style photo is 35×45 mm, which is 413×531 pixels at 300 DPI; many exam portals ask for a 200×230 px photo and a 140×60 px signature. The presets menu fills these dimensions in for you, and the crop-to-fill option makes sure your photo hits the exact size without being squashed. If the portal also enforces a file-size limit (like 20 KB or 50 KB), run the result through our image compressor afterwards.
Every platform has its own ideal dimensions — 1080×1080 px for Instagram posts, 1080×1920 px for Stories and Reels, 1280×720 px for YouTube thumbnails, 1200×630 px for link-preview (Open Graph) images. Using the right dimensions avoids automatic cropping and blurry upscaling by the platform. For websites, downscaling images to the size they're actually displayed at is one of the easiest ways to make pages load faster.
Traditional online resizers upload your image to a server and send back the result — meaning a copy of your passport photo or signature briefly lives on someone else's machine. PDFZero resizes with your browser's own HTML5 canvas, so the image never crosses the network. Once the page loads it even works offline, and there's no file left behind to be logged, cached or leaked.
Choose your image, enter the width and/or height in pixels, and click Resize. Leave one field blank to keep the aspect ratio automatically, or fill both and choose whether to stretch, fit or crop-to-fill the exact dimensions.
Yes. The presets menu includes common requirements like passport photo (413×531 px / 35×45 mm at 300 DPI), stamp size, and typical exam-portal photo (200×230 px) and signature (140×60 px) dimensions. Pick a preset and the width and height are filled in for you.
No. PDFZero resizes images entirely in your browser using the HTML5 canvas. Your photo is never uploaded to any server, which makes it safe for ID photos, signatures and other personal images.
Downscaling (making an image smaller) keeps images sharp and is the normal way to prepare photos for the web or portals. Upscaling (enlarging) cannot add detail that wasn't in the original, so a heavily enlarged photo may look soft.
Yes. Add several images and they are all resized with the same settings in one click, then downloaded individually or all together.
Yes — free with no signup, no watermark and no limits. Processing happens on your own device, so there are no server costs that would require a paid plan.