Resize Image Free - Image Resizer by Size, Percentage or Social Preset.

RepetiGo's resize image tool is a free, browser-based image resizer that changes the dimensions of a JPG, PNG, or WebP picture in three ways: by exact size in pixels, by percentage, or with a ready-made social-media preset. Upload one image, pick how you want to resize it, and download the result. Because it runs entirely in your browser, your image never leaves your device - nothing is uploaded to a server.

Whether you need an exact 512×512 icon, a photo scaled to 50%, or an image sized perfectly for an Instagram post, this free image resizer handles it. Lock the aspect ratio so nothing stretches, choose WebP for a smaller file or PNG to stay lossless, and even aim for a target file size in kilobytes. It is a fast, no-sign-up way to resize an image without installing anything.

Here is how to resize an image with RepetiGo. Pick a mode, set your target, and download - the whole thing takes seconds.

Different jobs call for different ways to resize, so the tool gives you three modes you can switch between at any time.

By Size is the most precise - type the exact pixels you need. As Percentage is the quickest way to shrink a photo proportionally. And the Social Media presets set the right dimensions for you in one click, which we cover in detail below.

The single most useful option is the Lock aspect ratio toggle. With it on, changing the width automatically adjusts the height (and vice versa) so your image keeps its proportions - it shrinks or grows evenly, with no stretching or squashing. This is exactly what people mean when they want to resize an image for Instagram without cropping or distorting it: lock the ratio and scale it down proportionally.

Turn the lock off only when you deliberately need a specific width and height that do not match the original ratio - for example forcing an image to an exact 1200×627 box. Just know that unlocking and entering mismatched dimensions will stretch the image, because this tool scales to the size you set rather than cropping to fit. If you need to change the shape by cutting rather than stretching, use the Crop Image tool linked below.

When you need a precise pixel size, use By Size mode and type the numbers. This is the fastest way to hit common exact dimensions - a 512×512 app icon, a 72×72 avatar, a 1024×1024 image, or any custom size a form or platform demands. Enter the width and height, and the tool resizes to exactly that.

For square targets like 512×512 or 72×72, turn Lock aspect ratio off if your source is not already square, so the tool produces the exact square you asked for. If keeping the proportions matters more than hitting the exact box, leave the lock on and match one dimension. Either way, the result footer confirms the final width × height before you download.

Sometimes the limit is not the dimensions but the file size - a portal that only accepts images under a certain number of kilobytes. RepetiGo has an optional target file size field for exactly this: enter a size in KB and the tool progressively lowers the quality to bring the file close to your target while resizing. It is how you resize an image to 20KB or resize an image to 100KB for a strict upload limit.

One important detail so it works for you: the target-size option applies to WebP output, not PNG, because PNG is lossless and cannot be squeezed to an arbitrary size the same way. So if you are aiming for a specific KB limit, choose WebP as the output format. If you need pure compression at the current dimensions instead of resizing, the dedicated Compress Image tool is the better fit and is linked below.

Getting a post to the right size is a one-click job with the Social Media mode. Select a platform and the width and height are set for you:

These five presets cover the most common posts. For sizes that are not in the list - a YouTube banner (2560×1440) or a Facebook cover - use By Size mode and type the exact dimensions; the presets handle posts and thumbnails, and By Size handles everything else. Keep Lock aspect ratio in mind: fitting a non-square photo into a square Instagram post proportionally means matching one side and accepting some empty space rather than stretching.

Resizing to an exact pixel size is one of the most common document tasks in India, because government portals and exam bodies specify precise photo dimensions and reject anything that does not match.

If you would rather use software you already have, here are the standard routes - and where the browser tool is quicker.

How to resize an image in Paint: open the image → Home tab → Resize → choose Pixels, tick "Maintain aspect ratio," enter the new width or height → OK → Save As. It is the simplest desktop option on Windows. In Photoshop (ps how to resize image): Image → Image Size → set width/height (keep the link icon on for proportional) → OK. In Photopea, the free browser Photoshop clone, it is the same Image → Image Size menu.

In Illustrator, select the object → use the Transform panel (W/H) or Object → Transform → Scale. In InDesign, select the frame → set W/H in the Control panel, holding Shift to keep proportions. On a Mac, open the image in Preview → Tools → Adjust Size → enter dimensions → keep "Scale proportionally" ticked. On an iPhone, there is no built-in resizer, so people use a web tool - RepetiGo runs in Safari with nothing to install, which is the easiest way to resize an image on the phone itself.

It depends on the direction. Making an image smaller (downsizing) keeps it looking sharp - you are removing pixels the screen did not need, so quality holds up well. That is why resizing down for a portal, an email, or the web is safe and common. Choosing PNG output keeps it lossless; WebP gives a smaller file at a quality you control with the slider.

Making an image larger than its original size is where quality drops. Because resizing only scales the pixels you already have (it does not invent new detail), pushing past 100% can make a photo look soft or pixelated. If you specifically need a bigger, cleaner image, that is a job for upscaling, not resizing - the Upscale Image tool adds detail as it enlarges. So to resize an image without pixelation, resize down freely, and enlarge with the upscaler rather than the resizer.

RepetiGo resizes your image on your own device using the browser's Canvas engine. Your picture is never sent to a server, which keeps private photos private, works even on a weak connection, and is why the tool carries a "Files stay in your browser" badge. There is no account wall and no watermark - the resized image you download is the full, clean file.

So you know whether it fits before you start, here is what this resizer is not built for - and where to go instead.

Use By Size mode and type the width and height - for example 512 and 512. If your source is not already square, turn off Lock aspect ratio so the tool produces the exact square you asked for. The result footer confirms the final dimensions before you download. The same steps work for any exact size, like 72×72 or 1024×1024.

Turn on Lock aspect ratio. With it on, changing one dimension adjusts the other automatically, so the image scales proportionally with no stretching. This is how you resize for Instagram or any platform without distorting the picture. If you need to change the actual shape, crop it with the Crop Image tool rather than resizing.

Choose WebP as the output format and enter your limit in the target file size field - the tool lowers the quality progressively to bring the file close to that KB target. This is how you resize an image to 20KB or 100KB for a strict upload. Note the KB target works for WebP output, not PNG, because PNG is lossless.

No - this tool resizes one image at a time; there is no batch or ZIP option here. Resize an image, download it, then start over with the next. If you need to shrink the file size of many images, the Compress Image tool supports multiple files and a ZIP download.

In MS Paint, open the image, click Resize on the Home tab, choose Pixels, tick "Maintain aspect ratio," enter a new width or height, and click OK, then Save As. It is the simplest option on Windows. If you would rather not open Paint, RepetiGo resizes in the browser with the same proportional control and a live preview.

Choose WebP for a smaller file, with a quality slider from 40% to 100% and the option to hit a KB target. Choose PNG when you need lossless quality or must keep transparency. This tool exports WebP or PNG; if a portal specifically needs a JPG, convert the result afterwards with the convert tools.

Making an image smaller keeps it sharp, because you are only removing pixels - so resizing down for the web, email, or a portal is safe. Making it larger than the original can look soft or pixelated, because resizing does not add new detail. To enlarge cleanly, use the Upscale Image tool, which reconstructs detail as it grows the image.

Yes. Switch to Social Media mode and pick a preset: Instagram Post (1080×1080), Instagram Story (1080×1920), Facebook Post (1200×630), LinkedIn Post (1200×627), or YouTube Thumbnail (1280×720). The dimensions are set for you. For sizes not in the list, like a YouTube banner, use By Size and type the exact pixels.

No. The resizer runs entirely in your browser using the Canvas engine, so your image never leaves your device - nothing is sent to RepetiGo. That keeps ID photos and personal pictures private, works on a weak connection, and is why there is no watermark on your resized image.