Image resizer
Resize a photo to exact pixel dimensions or a percentage of the original, right in your browser. Keep proportions or set them yourself.
Resize an image
Enter a width (and optionally height) in pixels, or switch to percentage.
Result
Preview of the processed copy. Your original file is never changed.
Resize by pixels or percentage
Pick Pixels when a form or platform tells you the exact size it wants. Pick Percentage when you just need the image smaller — 50% halves the width and height and cuts the file to roughly a quarter. The original dimensions are filled in automatically when you load an image so you can see what you are starting from.
Resize vs compress
Resizing changes how many pixels an image has. Compressing changes how efficiently those pixels are stored. If a photo is too big for an upload limit, do both: cap the longest side at something sensible (2048 px is plenty for sharing) and export at 80–85% quality. The image compressor can do the cap and the quality in one step.
On your phone
Oversized photos add up. TuckVault's photo compressor works through your whole library on iPhone or Android, and the duplicate cleaner finds the near-identical shots you never need to resize because you never needed two of them.
Frequently asked questions
Does resizing reduce image quality?
Making an image smaller discards pixels, which is fine and usually invisible. Making it larger invents pixels, which looks soft. Resize down whenever you can, and keep the original if you might need the full size later.
How do I keep the proportions?
Leave "Keep aspect ratio" ticked and set only the width; the height is calculated for you. Untick it to force exact dimensions — the image will stretch if the ratio differs.
What sizes do social networks use?
Common targets: 1080×1080 (square posts), 1080×1350 (portrait posts), 1080×1920 (stories), 1500×500 (X header), 400×400 (most profile pictures). Platforms re-compress on upload, so export at 85–90% quality.
Is anything uploaded?
No. Resizing runs in your browser with the canvas API. Nothing is sent to a server.