Image Resizer

Common Image Resizing Needs

How to Resize an Image Without Ruining It

1. Upload your image (JPG, PNG, or WEBP). Processing is local — the photo never leaves your browser.
2. Enter the target size. Set width or height in pixels, or scale by percentage. Keep "maintain aspect ratio" on unless you have a specific reason not to — it's what prevents stretched, distorted results.
3. Download the resized copy. Your original stays untouched, so you can produce several sizes from the same source.

Downscaling vs. Upscaling: One Is Free, One Isn't

Making an image smaller discards pixels intelligently — the browser's high-quality interpolation averages neighboring pixels, and results look clean at any reduction. A 4000×3000 phone photo resized to 1200×900 for a blog looks perfect and loads ten times faster. Making an image bigger is a different story: the missing detail simply doesn't exist, so enlargement interpolates between known pixels and produces softness. Modest upscaling (up to ~150%) is usually acceptable; doubling or more gets visibly blurry. The practical rule: always start from the largest original you have, and resize down, never up.

Resolution also interacts with file size more than people expect: halving both dimensions cuts the pixel count — and roughly the file size — by 75%. If your goal is a smaller file rather than smaller dimensions, resize first, then run the result through the Image Compressor; the combination routinely shrinks photos by 90%+ with no visible loss at display size.

Common Target Sizes Worth Knowing

Full-width blog and CMS images: 1200–1600px wide covers virtually all screens. Email-friendly photos: 800–1000px wide. Instagram feed: 1080×1080 (square) or 1080×1350 (portrait). YouTube thumbnail: 1280×720. Open Graph preview (the image shown when a link is shared): 1200×630. Passport/ID photo uploads for many government portals: specific pixel dimensions published per country — check the requirement and enter it exactly. If the proportions don't match your photo, crop to the right ratio first with the Image Cropper, then resize to the exact pixels; our full social media size guide lists every platform's current dimensions.

Frequently Asked Questions

Why does my resized image look stretched?

Both width and height were set to values that don't match the original's proportions with aspect-ratio lock off. Re-resize with the lock on, or crop to the target shape first and then resize.

Does resizing reduce quality?

Downscaling, done once from the original, loses nothing visible. Quality problems come from upscaling, from resizing an already-small image, or from repeated save-resize-save cycles on JPGs. Keep the original; derive every size from it.

What about DPI for printing?

Print size = pixels ÷ DPI. A 3000×2400px photo prints at 10×8 inches at 300 DPI (photo quality). The DPI number stored in a file is just a label — what matters is having enough pixels for the physical size you want.

Is there a file size or dimension limit?

Images up to about 8000px on a side work in modern browsers. Very large scans may take a moment — the work scales with pixel count.

Are my photos private?

Yes — resizing uses the HTML5 canvas in your own browser. Nothing is uploaded, stored, or logged.