SizeMint tools

Resize images by pixels or percent.

Set exact dimensions or scale by percentage. Aspect ratio stays locked unless you say otherwise — and nothing is ever enlarged without your permission.

Drop images here

or click to choose files

JPG, PNG, WebP, AVIF, GIF or BMP · multiple files supported · up to 25 MB each

The suite

More image tools, same privacy.

Every tool runs entirely in your browser.

Compress IMAGEHit a target size — 20KB to 5MB.Open tool → Convert FormatPNG ↔ JPG ↔ WebP ↔ AVIF.Open tool → Resize ImageChange dimensions by pixels or percent.You are here Crop ImageDrag to cut exactly what you need.Open tool → Image to PDFMany images, one PDF — in your order.Open tool →

How it works

Two ways to resize

Pixels is for exact targets: enter a width, a height, or both. With the aspect ratio locked, one dimension is enough — the other follows automatically. Enter both and the image fits inside that box without distortion. Percent is for quick scaling: 50 halves the image, 25 quarters it.

No accidental upscaling

Enlarging a photo cannot add detail — it only makes a bigger, softer file. So enlargement stays off unless you explicitly allow it. Dimensions are also clamped to a sane range (16 to 16384 pixels) to protect your browser's memory.

Private by design

Resizing uses local canvas APIs only. Your images never leave your device — see the Privacy Policy for the current disclosures.

FAQ

Questions about resizing images

How do I resize an image by percentage?

Choose Percent as the unit and enter a number in the Width field — 50 halves the dimensions, 200 doubles them (only when enlargement is allowed).

Will resizing keep my image's aspect ratio?

Yes, as long as Lock aspect ratio is checked. Enter one dimension and the other is derived automatically; enter both and the image fits inside that box.

Can I make an image larger than the original?

Only when Allow enlargement is checked. Enlarging cannot add detail, so it is off by default.

What format will the resized image be?

The original format is kept when it is JPG, PNG, WebP or AVIF; other inputs fall back to PNG. Lossy outputs are encoded at high quality.