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Image Tools · Updated October 17, 2026

Image Resizer

You can resize JPG, PNG and WebP images to exact pixel dimensions in your browser for free. Set the width and height, lock the aspect ratio and download resized copies without uploading anything.

Runs in your browserFree · No sign-up · No watermark
JPGPNGWebPJPG / PNG / WebPRuns in your browser
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Everything runs locally in this tab. No file is uploaded while the tool loads.

This tool runs in your tab. Nothing is uploaded and no copy is stored.

How files are handled

At a glance

Formats
JPG, PNG, WebP → JPG, PNG or WebP
Processing
In your browser
Max size
Up to 50 MB per image
Price
Free, no account
Updated
October 17, 2026
All Image Tools

About Image Resizer

Every form, store listing and profile photo has its own pixel requirements, and phone cameras rarely produce the dimensions asked for. Resizing sets an exact width and height in pixels; it is not the same as cropping, which removes content, or compressing, which keeps the dimensions and lowers quality. Knowing which one a form actually wants saves a lot of guesswork.

This tool shows the source dimensions, lets you type a target width or height, and keeps the proportions locked by default so the image does not stretch. Percentage presets handle quick halving or quartering, and a preview shows the file you selected before processing. Up to 20 images can be resized to the same target settings in one batch.

What this tool does

The details that matter when you use Image Resizer for real work.

  • Exact pixel dimensions

    Type the width and height you need; the output is exactly that size.

  • Aspect ratio lock

    Keep the original proportions with one click, so photos are never stretched or squashed.

  • Percentage presets

    Resize to 25%, 50%, 75% or 100% of the original dimensions in a single click.

  • Preview before processing

    See the selected image and its original dimensions before you commit to a batch.

  • Batch resizing

    Apply the same target size to up to 20 images and download each result.

  • Format aware

    Keep the input format or output PNG, JPG or WebP, with quality control for the lossy formats.

How to use Image Resizer

No account, no installation — the whole job happens in this browser tab.
  1. 01

    Add images

    Drop one or more files; the first image's dimensions become the reference for the batch.

  2. 02

    Type a new size

    With the aspect lock on, changing the width updates the height automatically.

  3. 03

    Or use a percentage preset

    25%, 50%, 75% and 100% scale the image relative to its original dimensions.

  4. 04

    Choose the output format

    Keep the format or pick PNG, JPG or WebP; lossy formats also get a quality slider.

  5. 05

    Resize and download

    Each result keeps the original base name and reports its new dimensions and size.

Supported formats and limits

Input
JPGPNGWebP
Output
JPG, PNG or WebP
Processing
Client-side, in your browser. Nothing is uploaded.
Maximum size
Up to 50 MB per image
Requirements
Chrome, Edge, Firefox or Safari on desktop or mobile

Limitations worth knowing

  • Upscaling cannot restore detail; enlarged images may look soft.
  • Turning off the aspect lock allows exact dimensions but can distort the image.
  • Resizing with JPG or WebP output is lossy; PNG output stays lossless.

Privacy and file handling

Resizing happens locally in your browser. Your images are never uploaded to FormatFlow, never transmitted to another server and never stored. The original and resized files stay in your tab memory until you close or refresh the page.

Read the full privacy policy

Image Resizer FAQ

Short, direct answers to the questions people ask before using this tool.
What is the difference between resizing and cropping an image?
Resizing changes the pixel dimensions while keeping all of the image. Cropping keeps the pixel density and cuts away part of the picture. If a form wants a square portrait, you usually need to crop first and then resize.
Should I upscale a small image?
Upscaling adds pixels by interpolation; it cannot recover detail that was never captured. A slightly soft enlarged image is often acceptable, but for print or large displays use a higher-resolution original.
How do I resize to an exact size without stretching?
Leave the aspect ratio lock on and set either the width or the height. The tool calculates the other value so the proportions stay correct. Turning the lock off allows an exact box but may distort the image.
Do photos stay upright and keep their metadata?
Orientation is applied before resizing so nothing arrives sideways, but EXIF data such as camera model and GPS coordinates is dropped in the process.
Are my photos uploaded when resizing?
No. Resizing runs locally in your browser through the Canvas API; no image data is uploaded, and no copy is stored on a server.
Does resizing change the DPI?
Screen image files have no meaningful print DPI; print size is determined by pixels. The tool changes pixel dimensions and does not write a DPI tag, so calculate print size from the pixel count and your target PPI.
What sizes should I use for social media?
Use the platform's current recommended pixel size and type it in directly. Common examples are 1920 x 1080 pixels for full-HD images and 1080 x 1080 for square posts.
Is there a limit on dimensions or file count?
Side lengths are capped at 16384 pixels and each file can be 50 MB; up to 20 files can share the same target size. Extreme dimensions can still fail because of browser memory.

Background reading

Format guides that explain the trade-offs behind Image Resizer.