Resize JPG, PNG, WebP or AVIF images right in your browser. Scale by a percentage, cap the longest edge, or fit the picture inside a box you set — the aspect ratio is never stretched, and nothing is enlarged by accident. No upload, no sign-up, no watermark, up to 20 images at a time.
Drop images here to resize to 50% of the original
JPG · PNG · WebP · AVIF — up to 20 files, 50.00 MB each. Nothing is uploaded.
Resizing is the one photo operation almost everyone needs and almost no editor makes easy: open the app, find the resize dialog, type two numbers, choose an algorithm, export, then find the file again. When the only goal is to get a 4000-pixel photo down to something a form will accept, that is a lot of ceremony.
This tool is the short path. Your browser already contains a high-quality image resampler — it is the same one that renders web pages on every screen size — so the work can be done on the picture you already have, on the device you are already using. Nothing is uploaded, which also means there is no upload to wait for.
| Mode | What it does |
|---|---|
| Percent | Scales by a share of the original size — 50% halves both sides. The only mode that can also enlarge, when you enter more than 100%. |
| Longest edge | Brings the longer side down to a pixel value and scales the other side to match. Ideal for a folder of photos of mixed sizes that all have to fit one limit. |
| Fit inside a box | Scales the image down until it fits inside a width and height you set, keeping its own proportions. Nothing is stretched and nothing gets bigger. |
Two different limits get confused constantly. A resize limit is about pixels — a form that wants artwork 800 px wide, a slide that needs a picture no taller than 1080 px. A size limit is about bytes — a marketplace that refuses anything over 500 KB. Resizing usually lowers the byte size as a side effect, because there are fewer pixels to store, but it is not a reliable way to hit a byte target.
When the number you actually have to satisfy is in kilobytes, use the compressor instead: it searches quality and dimensions together until the file lands under your target. Reach for the resizer when the number you have to satisfy is a width, a height or a shape.
Drop your files into the box above, then pick how the new size is worked out: a percentage of the original, a maximum longest edge, or a box the image has to fit inside. Every image is processed on your own device and the exact output dimensions are shown next to each file before you download it.
Scaling down throws pixels away, so the picture genuinely holds less detail — that is what makes the file smaller. The difference is how it is done: this tool uses the browser’s high-quality resampling, which averages neighbouring pixels instead of dropping rows and columns, so edges stay clean instead of turning jagged. JPG and WebP output is also re-encoded once, exactly as any editor would.
No. The longest-edge mode multiplies both sides by the same factor, and the box mode fits the image inside your box, so a portrait photo stays portrait and a panorama stays a panorama. There is no setting that stretches an image to a shape it does not have.
Yes — set the percentage mode above 100%. Be aware that enlarging cannot invent detail: the browser can only interpolate between the pixels that are already there, so a 400×300 photo at 200% looks softer than a real 800×600 one. The longest-edge and box modes only scale down, because those two express a maximum rather than a target.
JPG, PNG, WebP and AVIF. By default the output keeps the format you fed in, so a JPG stays a JPG. AVIF is the exception: browsers can read it but most cannot write it back, so for an AVIF input the tool asks you to pick JPG, WebP or PNG instead of quietly saving a file whose extension lies about its content.
No. Decoding, scaling and re-encoding all happen in your browser inside a Web Worker, so your photos never leave your device. There is no upload step and no copy of your image on our side.
Yes — up to 20 files per run, each up to 50 MB. They are processed one after another on your own device, and each image keeps its own proportions while following the same setting.
Shrink photos to an exact target size (1 MB, 500 KB, 200 KB, 100 KB, 50 KB, 20 KB) without uploading them. Runs 100% in your browser — private, free, no sign-up, no watermark.
Convert HEIC to JPG without uploading. HEIC is the iPhone default and most software cannot open it; JPG opens everywhere. Runs in your browser — free, private, no sign-up.
Convert WebP to JPG without uploading anything. Runs 100% in your browser — free, private, no sign-up, no watermark, and the original pixel dimensions are kept.
Convert JPG to WebP without uploading. Runs 100% in your browser — free, private, no sign-up, and typically 25–35% smaller at the same visual quality.
Convert SVG to PNG in your browser without uploading. Reads the SVG’s own width, height or viewBox so the PNG comes out at the right size, with transparency preserved.
Convert AVIF to JPG without uploading. Runs 100% in your browser — free, private, no sign-up, and the original pixel dimensions are preserved.