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Resize Image Online

Change the width and height of a photo in exact pixels, or scale it by a percentage, one image or a whole batch. Proportions stay locked unless you say otherwise, and your pictures are resized on your own device.

  • Free
  • No signup
  • Nothing uploaded
  • No watermark

Drop files here

PNG, JPG, WebP, SVG, BMP, GIF · read on your device, never uploaded

Converted entirely on your device. Nothing was uploaded.

How to Resize an Image to Exact Pixels

Resize Image Online: before and after PNG A BEFORE RESIZE IMAGE PNG A AFTER

Upload forms rarely take a photo straight off a phone. A job portal wants 600 × 600, an exam form wants 200 × 230, a website banner needs to be exactly 1200 pixels wide, and a 4000-pixel camera photo is far too big for any of them.

Add your pictures, then either drag the Scale slider or type the width or height you need. With "Keep the original proportions" ticked, you type one side and the other is worked out, so faces are never stretched. Untick it and both numbers are used exactly as typed. Choose PNG, JPG, WEBP or AVIF for the result and press Resize.

Resizing happens inside your browser. Photos of your family, your ID or your signature are not sent off to a server along the way.

No software to install Free Works on any device

Change Photo Dimensions in Six Steps

Here is how to use the resizer above.

  1. 1. Open the Resize Image tool

    The resizer sits above this guide. It works on computers and phones in every common browser, with no app to install.

  2. 2. Add one or more images

    Choose pictures or drag them onto the box. You can add several at once, and they will all get the same settings.

    Accepted:

    • JPG and PNG photos
    • WEBP, GIF and BMP images
    • SVG drawings, which are turned into pixels at the size you pick

  3. 3. Scale by percentage

    Drag the Scale slider anywhere from 5% to 200%. 50% halves both sides, which is a quick way to make a big photo lighter for sharing.

  4. 4. Or type exact pixels

    Enter a Width, a Height, or both. Typed pixels override the slider. With "Keep the original proportions" ticked, the width decides and the height follows. Untick it to force both numbers exactly.

    Examples:

    • 1080 wide for Instagram and WhatsApp
    • 600 × 600 for many profile photos
    • 200 × 230 for some exam forms (untick proportions)

  5. 5. Pick the output format

    Choose PNG, JPG, WEBP or AVIF. For JPG and WEBP a Quality slider appears, and JPG also asks for a background colour to place behind any transparent areas.

    PNGJPGWEBPAVIF

  6. 6. Press Resize

    One image downloads straight away; several arrive together in a ZIP. A summary lists every file with its new width × height and how many KB it weighed before and after.

No .png file to hand? Download a sample Image file (253.4 KB) and try it.

Try it now

What Does It Mean to Resize an Image?

A digital picture is a grid of tiny coloured squares called pixels. Its size in pixels, such as 4000 × 3000, is what upload forms and websites mean by “dimensions”. Resizing redraws the picture onto a grid with a different number of squares.

Making a picture smaller throws away pixels, which also makes the file lighter. Making it larger has to invent new pixels between the existing ones, so an enlarged image looks softer rather than sharper. Aspect ratio is the shape of the picture, width compared with height; keeping it fixed avoids stretched faces.

Image

.JPG .PNG

The same picture, redrawn at the width and height you choose.

Why people resize pictures

  • Job and exam application photos
  • Social media posts and profiles
  • Website banners and blog images
  • Lighter email attachments
  • Product photos for online shops
  • Slides and documents
  • Prints at a set size

Why Resize Photos Before Using Them?

Phone cameras save pictures far larger than most screens or forms need. Resizing to the right dimensions makes pages load faster, uploads succeed first time and attachments go through without bouncing.

“Match the form’s numbers, not your camera’s.”
  • Meet exact upload requirements
  • Faster web pages
  • No stretched or squashed faces
  • Format change in the same step
  • Lighter files as a side effect
  • Attachments that are not rejected
  • Many photos done at once
  • Personal photos stay local

Popular Uses for the Image Resizer

Everyday reasons people change picture dimensions.

  • Exam and admission forms Set the pixel width and height a notice asks for, then compress the result if there is a KB limit too.
  • Job portal photos Make a square profile or passport-style picture at the size the site expects.
  • Social media Fit posts, covers and profile pictures to each platform’s recommended dimensions.
  • Online shop listings Give every product photo the same width so a catalogue looks tidy.
  • Websites and blogs Shrink huge camera photos to a sensible width before adding them to a page.
  • Email and WhatsApp Halve a batch of photos with the Scale slider so they send faster.
  • Presentations Resize pictures before putting them in slides, so the file stays manageable.
  • Thumbnails Make small previews of larger pictures for a gallery or listing.

Resize Image Features

Everything you need for dimensions, and nothing you do not.

Exact

Pixel-perfect sizes

Type a width, a height or both, anywhere from 1 up to 10,000 pixels on each side.

Quick

Percentage slider

Scale from 5% to 200% in steps of five when the exact number does not matter.

Shape

Locked proportions

Keep the original aspect ratio automatically, or untick it to set both sides freely.

Batch

Many images at once

Resize a whole set with the same settings and download them together in one ZIP.

Format

Choose the output type

Save the resized picture in the format that suits where it is going.

Formats:

  • PNG
  • JPG
  • WEBP
  • AVIF
Result

Clear before and after

Each file is listed with its new dimensions and its old and new file size.

Why Use ToolXkit to Resize Images?

Nothing leaves your phone

Pictures are redrawn in the browser tab, so personal photos and ID scans are not handed to a server.

Resize Image for Every Kind of User

Students and applicants

Prepare photos for exam, scholarship and admission forms.

Online sellers

Give product photos a consistent size for listings.

Bloggers and web owners

Keep page images small enough to load quickly.

Social media users

Fit pictures to each platform’s dimensions.

Teachers and trainers

Size pictures for slides, worksheets and handouts.

Job seekers

Make profile photos that portals accept first time.

When to Resize a Picture

Resize your image when you are:

  • Filling in an online application form
  • Updating a profile photo
  • Adding photos to a website
  • Listing products online
  • Emailing a batch of camera photos
  • Posting to social media
  • Building a slide deck
  • Making thumbnails for a gallery

Tips for Sharp Resized Images

  1. For photographs, choose JPG or WEBP as the output. PNG keeps every detail but makes photo files much heavier.

  2. Shrinking keeps pictures sharp; enlarging past 100% cannot add detail that was never captured.

  3. Only untick "Keep the original proportions" when a form insists on both numbers. Crop first if the shape is very different, to avoid stretching.

  4. For a size in centimetres, convert to pixels: centimetres ÷ 2.54 × DPI. A 3.5 × 4.5 cm photo at 300 DPI is about 413 × 531 pixels.

  5. Need a size in KB too? Resize here first, then use Compress Image with a target file size.

  6. Keep your original photo. Resize a copy, so you can go back if the form’s rules change.

  7. When saving a transparent PNG logo as JPG, set the background colour to match where it will appear.

Frequently Asked Questions

Answers to common questions about this tool.

How do I resize an image to a specific size in pixels?

Add the image, type the width you need in the Width box, and leave "Keep the original proportions" ticked so the height follows. Press Resize. If a form demands both numbers exactly, untick the box and type both.

How do I resize a photo to 600 × 600?

Square photos are easiest if the picture is already square; crop it first if not. Then type 600 in Width and 600 in Height, untick "Keep the original proportions" and press Resize. The result is exactly 600 × 600 pixels.

How do I resize an image without losing quality?

Make it smaller, not larger, and keep the proportions locked. For the least loss, save as PNG, or use JPG with the Quality slider at 90% or higher. Enlarging always softens a picture, because new pixels have to be invented.

How do I resize a passport photo in cm?

This tool works in pixels, so convert first: divide centimetres by 2.54 and multiply by the DPI the form states, often 300. A 3.5 × 4.5 cm photo at 300 DPI is roughly 413 × 531 pixels. Type those numbers with proportions unticked.

How do I reduce an image to 50 KB?

Resizing changes dimensions, and the file shrinks as a result, but it does not aim at a KB figure. For an exact limit, open Compress Image, choose Target file size and press 50 KB. It can also set the pixel size in the same step.

Can I resize many images at once?

Yes. Add as many pictures as you like and every one gets identical settings. A single ZIP holds the whole batch, and the summary lists each file with its new dimensions.

Why is my resized image file bigger than the original?

Most likely it was saved as PNG. Phone photos are JPGs, and PNG stores photos much less compactly. Choose JPG or WEBP under Output format and resize again for a lighter file.

Do my photos leave my phone or computer when I resize them?

No, never. Each picture is redrawn inside this browser tab and saved directly to your downloads, so ID photos, signatures and snaps of the children stay with you.

Can I make a small image bigger?

Yes, up to 200% with the slider or up to 10,000 pixels by typing. The picture will be larger but softer, because no tool can recover detail that was never in the original.

Can I resize images on my phone?

Yes. On Android or iPhone, pick photos from your gallery, set the size and press Resize. A single photo saves to your downloads; several arrive as a ZIP your phone’s files app can open.

Does resizing remove location data from photos?

Yes. The picture is redrawn from its pixels, so the camera details and GPS location stored inside the original are not copied into the new file.

Can I resize a PNG and keep the transparent background?

Yes. Leave the output format on PNG, or choose WEBP, and transparency is kept. JPG cannot store transparency, so if you pick JPG the see-through areas take on whichever background colour you set.

Does Resize Image reduce my photo’s quality?

Converting and cropping keep quality close to the original. Compressing trades a little detail for a much smaller file, and a lighter setting keeps more of it. Compare the preview with your original before saving.

Are my photos uploaded to a server?

No. Pictures are opened and changed inside your browser, and the result is saved to your device. Family photos, ID scans and signatures are never sent anywhere.

Further reading

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