Resize Photo Online

1. Load the photo

   Use the “Choose image” button, drag the file onto the page or paste a screenshot with Ctrl+V. At the top you'll also find “Try a sample photo” to test the tool on the fly.

2. Type the width and height

   Enter the pixel values in the width and height fields. With “Lock aspect ratio” on, filling in one field is enough: the other updates by itself and the photo doesn't get distorted.

3. Or start from a preset

   One click on Instagram post, Instagram story, Facebook cover, YouTube thumbnail, Full HD or Profile picture fills the fields with the correct measurements for that destination.

4. Apply and save

   Press “Apply size”, check the result in the preview and save it with “Download”. “Undo” takes you back to the starting image if you want to try different measurements.

The two tools solve different problems. Resizing changes the resolution of the entire image: all the content stays visible, just spread across a different number of pixels. Cropping, on the other hand, discards a portion of the photo to change its framing or proportions. If you need to go from a landscape shot to a square, first crop the photo to the right ratio, then bring it here to set the exact measurements.

Resizing is typically what you need when an online form rejects your file as “too large”, when an 8 MB email attachment can become 800 KB with no visible difference on screen, or when a website has to load fast: publishing a 6000-pixel photo inside an 800-pixel slot is a waste of bandwidth that slows the page down for everyone.

The six presets cover the most common needs, so you don't have to memorize a single number:

Keep an eye on one detail: if your photo's proportions differ from the preset's, the result can come out squashed. The complete measurements, platform by platform, are collected in the guide to social media image sizes.

Shrinking an image a lot in a single jump is the quickest way to ruin it: the browser has to throw away too many pixels at once, and fine detail — hair, fabric textures, small lettering — turns into jagged edges and moiré. That's why the editor works in two passes: when the reduction is drastic, the image is first brought to an intermediate size and only then to the final one. Each pass resamples with the Canvas's bilinear interpolation, and the double filtering produces smooth contours and text that's still readable.

All the processing runs inside your browser tab: not a single byte of your photo is sent over the network, which also means zero upload waits. The supported limit is 4096 pixels on the long side, and the file comes out with no watermark and no EXIF metadata.

Reducing the pixel dimensions almost always lowers the weight in KB as well, because there's less data to save. But resolution and compression are two independent levers, and for the lightest possible file it pays to use both:

• Dimensions first — bring the photo down to its actual display size (e.g. 1200 px for a blog article).
• Then compression — adjust the quality level until you hit the best visual compromise.
• Finally the format — at equal quality, converting to WebP saves roughly an extra 25-30% over JPG.

Beware of enlarging: adding pixels doesn't invent detail the shot never captured. Beyond 150-200% of the original size, the image looks visibly soft.

• Keep “Lock aspect ratio” on at all times, except when a platform demands an exact format.
• Hold on to the high-resolution original: you can always scale down, but you can't scale up well.
• For the same subject on several social networks, start from the full file each time instead of resizing in a chain.