Resize Image

Features

• Resize any image to a custom width × height — keeps the photo's proportions by default, so nothing stretches
• Presets for Instagram (square, portrait, story), YouTube thumbnail and Facebook / OpenGraph that come out at exactly that size — a photo of another shape sits whole over a blurred copy of itself, or is cropped to fill
• 720p and 800×600 follow your photo — a portrait photo gets 720×1280 or 600×800, not a squashed landscape
• Output as PNG, JPG, WebP, BMP, GIF, or TIFF — pick the format that fits your target
• Runs locally in the browser — your photo never uploads, even on free tier
• No watermark, no sign-up, no file-size cap — completely free for personal and commercial use
• Free alternative to ResizeImage.net, BeFunky, BIRME, and Adobe Express image resize

Frequently Asked Questions

How do I resize a photo for an Instagram Story without cropping or stretching it?

Pick the Instagram Story / TikTok cover preset (1080×1920) and click Process. The image comes out at exactly 1080×1920: a landscape or square photo sits whole in the middle over a blurred, zoomed copy of itself, so nothing is cut off or squashed. For a full-frame look instead, set the Resize method to Crop to fill, which trims the sides, or pick black bars as the background. The square, portrait, YouTube and Facebook presets work the same way.

How is this different from /tools/crop-image?

Resize changes the pixel dimensions of the whole image; Crop Image lets you choose exactly which part of the photo to keep. When the new size has a different shape from your photo, the resizer gives you the choice: Fit keeps the whole photo at its own shape, Add background fills the gap with a blurred copy or black bars, Crop to fill trims the edges evenly around the middle, and Stretch forces the size. To pick the crop area yourself, use Crop Image first.

Will resizing reduce image quality?

Resizing down (e.g. 4000×3000 → 1280×720) preserves quality — there's more source detail than the target needs. Resizing up just stretches existing pixels and won't add real detail — for that, use our AI Image Upscaler.

Why is this faster than ResizeImage.net or BeFunky?

ResizeImage.net and BeFunky upload your photo to their servers, queue it, re-encode it, and send it back. This resizer runs FFmpeg WebAssembly entirely in your browser, so a 10 MB JPG resizes in well under a second.

Does the image resizer keep aspect ratio automatically?

Yes — the resizer never stretches your photo unless you choose Stretch. For a custom size, Fit (the default) keeps the photo's shape inside the width and height you give, so one side may come out smaller: a 4000×3000 photo resized to 1280×720 comes out 960×720. The presets come out at exactly their size, with the whole photo over a blurred copy of itself; switch to Crop to fill to fill the frame instead. Add background and Crop to fill round an odd width or height down to an even number.

What formats can I resize?

Input: JPG, JPEG, PNG, WebP, BMP, TIFF, HEIC/HEIF (most browsers). Output: PNG (default, lossless), JPG (smaller files), WebP (best compression), BMP, GIF, or TIFF.

Is there a file size limit?

Free users can resize up to 10GB images. For most images that's effectively no limit — a 50-megapixel JPG is around 30 MB.