Image Resizer

This free, in-browser image resizer lets you resize and crop JPG, PNG, and WebP images in seconds, with one-click presets for Instagram, LinkedIn, Open Graph, YouTube, and more. Set exact pixel dimensions, reframe with a precise crop, then export as JPEG, PNG, WebP, AVIF, BMP, or PDF. Everything runs entirely on your device, so your files stay completely private with no uploads, no signup, and no watermarks.

How to use the image resizer and cropper

1. Drag and drop your JPG, PNG, or WebP file into the tool, or click to browse and select an image from your device.
2. Choose what you want to do: enter exact pixel dimensions to resize the image, or switch to crop mode to cut and reframe it.
3. Pick a social-media preset (such as Instagram post or YouTube thumbnail) to snap to the right size automatically, or set a custom width and height.
4. Toggle the aspect-ratio lock on to keep your image’s proportions, or off to stretch it to specific dimensions.
5. Drag the crop handles to select the area you want to keep, then preview the result in real time.
6. Select your export format (JPEG, PNG, WebP, AVIF, BMP, or PDF) and adjust quality if needed.
7. Click download to save the finished image to your device. Nothing is ever uploaded to a server.

Resizing vs. cropping: what’s the difference?

Resizing and cropping both change how big an image appears, but they work in fundamentally different ways. When you resize an image, you scale the entire picture up or down to new dimensions. Every pixel is kept, but the image is squeezed or expanded to fit the width and height you choose. If you keep the aspect ratio locked, the whole picture shrinks or grows in proportion; if you unlock it, the image can stretch and look distorted.

When you crop an image, you cut away the parts you don’t want and keep a selected region. Cropping changes the framing and composition rather than scaling the whole picture, so it’s the right choice when you need to remove empty space, straighten a subject, or force a specific aspect ratio like 1:1 for a profile photo. In practice you often do both: crop to the right shape first, then resize to the exact pixel dimensions a platform requires. This image resizer lets you combine both steps before a single export.

Resizing without losing quality

The most important rule for image quality is the direction of the resize. Downscaling, or making an image smaller than the original, is safe. The source already contains more detail than the smaller version needs, so the result stays crisp. This is why resizing a large camera photo down to 1080 pixels for social media looks clean every time.

Upscaling, or making an image larger than the original, is where quality suffers. The tool has to invent pixels that were never captured, so edges soften and fine details blur. A 500-pixel-wide image enlarged to 2000 pixels will never look as sharp as a photo shot at that size. For the best results, always start from the largest original you have and resize down to the size you need. If you must enlarge, keep the increase modest and expect some softness. Choosing PNG or a high-quality JPEG export also helps preserve the detail that’s there.

Social-media size presets and why platforms need specific dimensions

Every social platform displays images inside a fixed layout, and each one expects a particular shape and resolution. Upload something the wrong size and the platform will crop it automatically, often cutting off faces, logos, or text in unpredictable ways. Using the correct dimensions from the start means your image appears exactly as you intended, stays sharp, and isn’t recompressed more than necessary. The presets in this image resizer match the most common requirements so you don’t have to memorize them.

Platform & placement	Recommended size (pixels)	Aspect ratio
Instagram post (square)	1080 × 1080	1:1
Instagram story / reel	1080 × 1920	9:16
Facebook cover photo	820 × 312	~2.63:1
X / Twitter header	1500 × 500	3:1
LinkedIn shared link image	1200 × 627	~1.91:1
YouTube thumbnail	1280 × 720	16:9
Open Graph (link preview)	1200 × 630	~1.91:1

Choosing the right export format

The format you export to affects file size, quality, and where the image will work. JPEG is the best all-rounder for photographs and social posts; it produces small files with adjustable quality but doesn’t support transparency. PNG is ideal for graphics, logos, screenshots, and anything with sharp edges or a transparent background, though files are larger. WebP and AVIF are modern formats that deliver noticeably smaller files at the same quality, making them excellent for websites; AVIF usually compresses the hardest. BMP is an uncompressed format for specific software needs, and PDF is handy when you want to drop an image straight into a printable document. When in doubt, use JPEG for photos and PNG for graphics.

Resizing by percentage, exact pixels, or a target file size

There are three different ways to think about making an image smaller, and choosing the right one saves a lot of trial and error. Resizing by exact pixels is best when a platform or form demands precise dimensions, such as 1080 × 1080 for a profile picture. Resizing by percentage is quicker when you simply want everything proportionally smaller, like cutting a batch of photos to 50% of their original size without working out each number by hand. Resizing to a target file size matters when an upload form caps you at a set weight in kilobytes, such as the 100 KB or 200 KB limits common on job portals and government sites.

File weight is driven by two things: the pixel dimensions and the compression quality of the export. To hit a specific kilobyte figure, reduce the dimensions first, then nudge the export quality slider down until the size lands under the cap. JPEG and WebP give you the most control here because their quality is adjustable, while PNG holds detail but produces larger files. If you need to meet a strict KB limit exactly, our companion Image Compressor is built to target a file size directly.

Print and document sizes at 300 DPI

Screen images are measured in pixels, but anything destined for print or an official document is measured in inches or millimeters at a set resolution. The standard for print is 300 DPI (dots per inch), so to get the pixel dimensions you multiply the physical size by 300. The table below lists the most requested print and ID sizes already converted to pixels, so you can punch them straight into the resizer.

Use case	Physical size	Pixels at 300 DPI
US passport / visa photo	2 × 2 in	600 × 600
Most international ID photo	35 × 45 mm	413 × 531
Standard photo print	4 × 6 in	1200 × 1800
Medium photo print	5 × 7 in	1500 × 2100
US Letter document	8.5 × 11 in	2550 × 3300
A4 document	210 × 297 mm	2480 × 3508

Frequently asked questions

How do I resize an image?

Load your image into the tool, enter the width and height you want in pixels (or pick a preset), and the image is scaled to match. Keep the aspect-ratio lock on to avoid distortion, preview the result, then export in your chosen format.

What is the difference between resizing and cropping?

Resizing scales the whole image to new dimensions while keeping all of the picture. Cropping cuts away part of the image to keep only a selected region, changing the framing. Resizing changes size; cropping changes composition.

Can I resize an image without losing quality?

Yes, as long as you make it smaller. Downscaling preserves sharpness because the original already holds enough detail. Upscaling beyond the original size forces the tool to add pixels, which softens the image, so start from the largest source file you have.

What is the best image size for Instagram, YouTube, or Open Graph?

Instagram square posts are 1080 × 1080 pixels and stories are 1080 × 1920. YouTube thumbnails are 1280 × 720. Open Graph link previews are 1200 × 630. The built-in presets set these dimensions for you automatically.

How do I crop an image to a specific ratio?

Switch to crop mode and choose a fixed aspect ratio such as 1:1, 16:9, or 4:5, or select a platform preset. Then drag the crop box over the area you want to keep; it stays locked to the ratio you picked.

What formats can I export to?

You can export your finished image as JPEG, PNG, WebP, AVIF, BMP, or PDF. Use JPEG for photos, PNG for graphics with transparency, WebP or AVIF for the smallest web-friendly files, and PDF when you need a document.

Does the tool work offline, and is it private?

Yes. The image resizer runs entirely in your browser, so your images are processed on your own device and never uploaded to a server. Once the page has loaded it keeps working even without an internet connection.

Is it really free?

Completely. There’s no signup, no account, no watermark, and no limit on how many images you resize or crop. The tool is free to use as often as you like.

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

Lower the pixel dimensions first, since smaller images naturally weigh less, then export as JPEG or WebP and step the quality slider down until the file drops below your target. Checking the preview size as you go lets you land just under a 100 KB or 200 KB cap. For exact file-size targets, the Image Compressor aims at a chosen weight directly.

How do I make a passport photo?

Switch to crop mode and set a 1:1 square ratio, then frame your face within the crop box. Resize the result to the required dimensions, which are 600 × 600 pixels for a US 2 × 2 inch photo or 413 × 531 pixels for the common 35 × 45 mm international size, both at 300 DPI. Export as a high-quality JPEG for printing or upload.

Can I resize multiple images at once?

This tool resizes and crops one image at a time, which gives you precise control over each crop and export. For a batch with identical dimensions, resize them one after another using the same preset, or apply a consistent percentage so every image scales by the same amount.

Related design tools & guides

• Image Compressor — shrink file size for faster-loading pages and smaller uploads.
• Image Converter — convert between JPG, PNG, WebP, AVIF, and other formats.
• Image Editor — adjust, annotate, and fine-tune your images in the browser.
• All free design tools — browse the full collection of private, in-browser utilities.