Image Resizer

Resize Images Online — Pixels, Print Size & File Size

Resize by exact pixels, centimeters, millimeters, inches, percentage, aspect ratio or a target file size. Everything runs in your browser — no upload, no signup, no watermark.

100% in-browser
No account required
Free & unlimited
JPG · PNG · WebP · BMP · GIF · TIFF

Drop an image here or

Paste with Ctrl+V · drag files anywhere · batch up to 50 images

Processed locally — no image is ever uploaded.

Original image

Width

— px

Height

— px

Resolution

— DPI

File size

—

Format

—

Aspect ratio

—

After resize

— × — px—

Aspect ratio

Pick a ratio — width and height stay linked.

Width

Height

Unit

DPI

Used to convert pixels to physical size (10–1200).

How to apply the ratio

Crops the source so the frame keeps the ratio with no empty space.

Crop position

Live preview

Drag the handle — or focus it and use the arrow keys — to compare quality.

OriginalResized

—

Print size preview

Paper / format

Your result drawn to scale over a real paper outline with a ruler guide.

Ruler shows the scale of this preview

—

Set the exact DPI in the DPI converter

Export

Output formats

JPGPNGWebP

Tick more than one to export every version in a single ZIP.

Quality85%

Private by design: decoding, resizing and encoding all happen in this browser tab. Nothing is stored on a server.

Saved presets

Need it print-ready? Set the exact DPI in the DPI converter Making a passport photo? The passport photo tool is coming soon

Why this resizer

Everything the other resize tools leave out

Built to beat img2go, imageonline.co and WPS on control: one screen for pixels, print size, aspect ratio, file size and quality.

Switch units in one tap

Pick pixels, cm, mm or inches from the unit menu — width and height convert together at your chosen DPI.

Real print-size preview

See the result drawn to scale over A4, Letter, 4×6 or a passport outline before you download anything.

Resize to a file size

Ask for “under 100 KB” and the tool balances quality and dimensions for you — no second compressor step.

Smart, face-aware cropping

When a ratio change needs a crop, faces are detected and kept inside the frame instead of chopped off.

Upscaling that warns you

Going above the original resolution triggers a clear warning plus a one-click sharpening enhancement.

Batch with per-image overrides

Drop 50 images, give individual ones their own size, and take the results back as an organised ZIP.

JPG + PNG + WebP in one click

Export every format of the same result at once, with DPI metadata written into JPG and PNG for printing.

Private, unlimited, unbranded

No upload, no signup, no watermark and no ads in the way. Saved presets stay in your browser's local storage.

How it works

Three steps to the right size

No software to install, no account, no waiting for an upload.

Drop your image

Drag and drop, paste from the clipboard, or import a link. Width, height, DPI and file size appear instantly.

Pick how to resize

Exact units, percentage, aspect ratio, device and social presets, or a target file size — with a live preview and a print-size ruler.

Download

Compare before and after, then export JPG, PNG and WebP — individually or as a ZIP for batches.

FAQ

Image resizing questions

Is my image uploaded to a server?

No. Decoding, resizing and encoding all happen inside your browser with the Canvas API. The file is read from your device and the result is written back to your device — nothing is sent anywhere.

What is the difference between resizing and changing DPI?

Resizing changes the number of pixels, which changes how much detail the image holds. Changing DPI only changes the print metadata that tells a printer how densely to place those pixels — the pixel count stays the same. Use the DPI converter when the size in pixels is already right but the print size is wrong.

Will resizing make my image blurry?

Shrinking keeps images sharp because detail is discarded cleanly. Enlarging invents pixels, so quality drops — which is why this tool warns you before an upscale and offers an edge-aware sharpening pass you can apply with one click.

How do I resize without losing aspect ratio?

Turn on the aspect ratio lock (on by default), type a width and the height is calculated for you. Tap a ratio chip — 1:1, 16:9 and friends — and switch units (px, cm, mm, in) anytime; both fields convert together. Pick crop, fit or stretch for how the ratio is applied.

Can I resize many images at once?

Yes. Drop up to 50 images, keep the global settings for most of them, switch on a custom size for the ones that need it, and download the whole batch as a ZIP.

Which formats are supported?

Input: JPG, PNG, WebP, BMP, GIF and TIFF. Output: JPG, PNG and WebP, including all three at once. Animated GIFs are exported using their first frame.

About resizing

Resize images without breaking print quality

Pixels first, print size second

Resizing changes the pixel grid itself - fewer pixels for a lighter file, more pixels when you upscale. If the pixel count is already correct and only the physical size is wrong, change the metadata instead: the DPI converter rewrites dots per inch without touching a pixel, and changing a PDF's DPI works the same way.

Know what you are working with

Before you resize, run the image through the DPI checker to see its current resolution, dimensions and print size. When the target is a specific paper size, the DPI calculator tells you the exact pixel count the print needs.

One private, in-browser workflow

Everything here runs locally - nothing is ever uploaded. The same engine backs the passport photo sizes table, and our DPI guide explains resolution, print quality and when 300 DPI really matters.

Keep going

Learn more

New to DPI? Start at the DPI converter homepage, browse the complete DPI guide, or pick a guide below.

All guides →