Bulk Image Resizer

Each mode applies to the whole batch, so a folder of photos takes one setting:

Tick Add "_resized" suffix to download photo.jpg as photo_resized.jpg, so it can’t be mixed up with the original. Your settings are remembered on this device.

These are the sizes the presets make, commonly recommended for each platform. Platforms change their guidance, so check their help pages if an exact size matters.

Phone and camera photos are often 4,000 pixels wide or more, far bigger than a web page shows them. Halving the width and height leaves a quarter of the pixels, so resizing saves more than anything else. Sizes to aim for:

• Full-width banners: 1920 px wide is a common choice, matching Full HD (1920 × 1080) screens.
• Images in a column of text: twice the column width, for example 1600 px for an 800 px column.
• Thumbnails: twice the displayed size, for example 600 × 600 for a 300 px square.

Why twice? Most phones and many laptops have high-density (“retina”) screens with at least two physical pixels for each pixel of the layout, so double-size images stay crisp.

Then compress the resized copies to trim the file size further, often with no visible change. To save as WebP or AVIF, which are usually smaller still, use the image converter.

The aspect ratio is an image’s shape, its width compared with its height. Ask for a different shape and one of three things happens:

• Fit (To Dimensions, aspect ratio ticked): the whole image fits inside your width and height, so one side may be smaller than you typed.
• Stretch (To Dimensions, aspect ratio unticked): exactly the size you typed, but people and objects look squashed if the shape differs.
• Crop (Social Presets): the exact size, centred, with the extra trimmed off. A landscape photo made into an Instagram Post loses strips from its left and right edges.

If the subject is off-centre, crop it to the right shape first, then resize it here.

Shrinking works best. The tool uses the browser’s high-quality smoothing, so fine detail is blended evenly rather than turning jagged.

Enlarging can’t add detail that isn’t there: edges come out soft rather than blocky, but look blurry up close. To Dimensions and the presets enlarge small images without warning, so check your originals are big enough. Max Width and Max Height never enlarge.

JPEGs are saved at 92% quality, a high setting. Each save loses a little, though, so resize from the original rather than an already-resized copy.

JPG stays JPG, PNG stays PNG and WebP stays WebP, and transparent backgrounds are kept. iPhone HEIC photos come out as JPG. GIF, BMP and AVIF images come out as PNG (an animated GIF becomes a still image).

Phone photos stored sideways with a rotation tag come out upright, with width and height the right way round.

The resized copies have no EXIF metadata, so camera details and GPS location are removed; your originals aren’t changed. To see what a photo contains, use the metadata viewer.

Your browser does the resizing, on your own phone or computer, so your photos and the resized copies are never uploaded or sent anywhere.

To check, open your browser’s developer tools and watch the Network tab while you resize. The only requests are the page’s own code (such as the HEIC decoder) and anonymous page-view counts, described in our privacy policy. After your first visit, the resizer works offline too.