Resize images to exact pixel dimensions

Resize images without the guesswork

Most platforms silently mangle images that arrive at the wrong size — profile photos get center-cropped, banners get stretched, email images balloon load times. Resizing to the exact pixel dimensions a platform expects is the difference between “looks professional” and “looks off.” This tool resizes to precise dimensions with aspect-ratio lock, percentage scaling, and ready-made presets for the sizes people actually need.

How to resize an image

1. Drop your image in the panel — its current dimensions appear immediately.
2. Enter a width or height (the other side fills in automatically while the ratio is locked), pick a percentage, or choose a social-media preset.
3. Click Resize and download. PNG stays PNG, JPG stays JPG — nothing else about the file changes.

Downscaling vs. upscaling

Shrinking an image discards pixels, and done with proper resampling (as here) the result stays crisp — it is the single most effective way to cut file size, often beating quality compression alone. Enlarging is the opposite: the browser must invent pixels that were never captured, so a small logo scaled to banner size will always look soft. When you need both smaller dimensionsand a smaller file, resize first, then run the result through ourImage Compressor — the two-step combo routinely cuts photos by 95%.

Common target sizes in 2026

Web hero images: 1600–2000px wide is plenty for any screen. Blog inline images: 800–1200px. Email: keep every image under 600px wide and under 200 KB. Print is the exception — a sharp 4×6″ print wants roughly 1200×1800 (300 DPI), and you should never downscale originals you might print later. When in doubt, keep the original and resize a copy; this tool never modifies your source file.

Nothing leaves your device

Like every FileNimbus tool, resizing runs entirely in your browser. There is no upload step, no processing queue, and no copy of your photo on any server. A free account adds a history of your recent resizes so you can remember which dimensions you used last time.