What does a social media image resizer do?

It scales a single uploaded image to one of several documented platform sizes and gives back a PNG at the exact pixel dimensions. Targets currently supported are the LinkedIn square and landscape share sizes, the X (Twitter) summary card, and the YouTube video thumbnail. Each output is named after the target so the file is self-describing in your Downloads folder.

Will my image be cropped or padded?

By default the resizer automatically adjusts the crop for the selected platform: the source is scaled to fill the target and the spill is trimmed with a small rule-of-thirds bias so the subject is more likely to stay in frame, including for portrait phone shots uploaded to a landscape target. Turn on Keep Full Image to preserve the entire source as a letterboxed PNG instead, or use Adjust Crop to pick the exact region yourself.

What size do LinkedIn post images need to be?

LinkedIn's help center states a 1200 by 627 pixel minimum for landscape images attached to a shared link and a 1:1 ratio for square feed posts. 1080 by 1080 is the conventional value within that square range. The 1.91 to 1 landscape ratio matches the Open Graph preview, so a single 1200 by 627 image also serves as a link share preview on most platforms. Keep the file under 5 MB so LinkedIn does not reject the upload.

What size should a Twitter (X) card image be?

X's developer documentation specifies a recommended 1200 by 628 pixel image at a 1.91 to 1 aspect ratio for the summary card with large image. Images down to 300 by 157 and up to 4096 by 4096 are accepted, but 1200 by 628 is the size that renders at full sharpness on both mobile and desktop feeds. Keep the file under 5 MB and use PNG or JPG; animated GIFs are flattened to the first frame.

What is the YouTube custom thumbnail size?

YouTube recommends a 1280 by 720 pixel thumbnail in a 16 to 9 aspect ratio, with a minimum width of 640 pixels. JPG, PNG or GIF are accepted and the file must stay under 2 MB. The thumbnail is what appears next to your video in search results and on the channel page, so a sharp image at this size is worth more than a higher-resolution image scaled down by YouTube's own renderer.

Why is my image blurry after I resize it?

Blurry output usually comes from upscaling a small source to a much larger target. Each pixel of the new image has to be invented from the surrounding ones, and that is where the softness appears. For the sharpest result, upload a source at or above the target dimensions for your chosen platform. If your source is much smaller, pick the next-largest platform target or redesign for a cleaner upscale.

Can I use the resized image as my og:image meta tag?

The Open Graph protocol documents 1200 by 630 as the standard og:image size, which Facebook, LinkedIn, X and Slack use for share previews. This resizer's LinkedIn landscape output is 1200 by 627 (three pixels shorter than the OG baseline) and is accepted as a share preview by most platforms, but for the canonical og:image meta tag use the OG Image Generator's 1200 by 630 output. Use this resizer for in-feed posts; use the OG Image Generator for og:image.

📐 Social Media Image Resizer

Social Media Image Resizer

Resize one image to a documented social-platform size. Pick the target, upload a PNG or JPG, and download a single PNG at the exact pixel dimensions the platform expects.

For: website owners, creators, marketers and developers posting images to LinkedIn, X (Twitter) and YouTube. · How it works: pick a target → upload → the image is automatically adjusted for the selected platform → download.

1. Pick a target

Each size is sourced from the platform's own help center or developer documentation.

1080 × 1080

Square image shown in feed posts.

1200 × 627

Landscape image attached to a shared link.

1200 × 628

Link-preview card shown next to a tweet that contains a URL.

YouTube

1280 × 720

Custom thumbnail shown next to a YouTube video.

2. Upload & resize

Active target: — pick one above first.

What does this tool do?

It takes one image and produces a single PNG sized to the exact pixel dimensions of a documented social-platform target. The generator automatically adjusts the crop for the selected platform — the source is scaled to fill the target frame and the spill is trimmed with a small rule-of-thirds bias so the subject is more likely to stay in frame. A Keep Full Image option preserves the entire source as a letterboxed PNG, and an Adjust Crop editor lets you pick the exact region yourself.

Who is it for?

Website owners sharing announcements on LinkedIn or X (Twitter).
Creators and marketers posting consistent feed imagery across multiple platforms.
Developers building CMS integrations or scheduled post tooling that need predictable output sizes.
YouTube creators producing channel art and video thumbnails at the platform's documented sizes.

Quick Answer

The Social Media Image Resizer takes one PNG or JPG and outputs a single PNG sized exactly to one of four documented platform targets: LinkedIn square 1080×1080, LinkedIn landscape share 1200×627, X (Twitter) summary card 1200×628, or YouTube video thumbnail 1280×720. The source is automatically adjusted to fit the target — with optional Keep Full Image (letterboxed padding) and Adjust Crop (manual region picker) for cases where the automatic crop is not quite right.

Requirements

Supported input: PNG or JPG, up to 10 MB. Any aspect ratio; the source is automatically adjusted to fit the target, or use Keep Full Image / Adjust Crop.
Output format: Single PNG file at the exact pixel dimensions of the chosen target.
Available targets: LinkedIn square 1080×1080, LinkedIn landscape 1200×627, X summary card 1200×628, YouTube thumbnail 1280×720.

Supported sizes

Every size is sourced from the platform's own help center or developer documentation. The source for each row is a single citation, not an SEO roundup.

Platform	Use case	Size	Source
LinkedIn	Square image shown in feed posts.	1080 × 1080	LinkedIn Help — Image requirements for LinkedIn shares
LinkedIn	Landscape image attached to a shared link.	1200 × 627	LinkedIn Help — Image requirements for LinkedIn shares
X	Link-preview card shown next to a tweet that contains a URL.	1200 × 628	X Developer Docs — Cards: Summary Card with Large Image
YouTube	Custom thumbnail shown next to a YouTube video.	1280 × 720	Google Help — YouTube: Add a thumbnail to your video

OG image vs social media resizer

An OG image is the preview card a social platform shows when somebody shares a link to your page. It comes from the Open Graph protocol and is set with an og:image meta tag. The 1200 by 630 size is the widely accepted baseline. A social media resizer produces a feed-post image at the platform's documented pixel dimensions — a LinkedIn square, an X card, or a YouTube thumbnail. The two answer different questions: the OG image is for share-card previews, the resizer is for posts your audience actually sees in the feed. Use the OG Image Generator for share previews, and this resizer for feed posts.

Common social image mistakes

Most upload issues come from the wrong aspect ratio, an oversize file, or a low-resolution source being stretched past its native size. The items below cover what comes up most often.

Uploading the wrong aspect ratio. LinkedIn trims square posts on the timeline, X (Twitter) clips tall images to its 2 to 1 preview, and YouTube letterboxes non 16:9 thumbnails into a black frame. Match the documented dimensions and your image fills the frame end to end.
Saving the file above the platform limit. LinkedIn caps uploads at 5 MB, X at 5 MB and YouTube at 2 MB. The generator writes an optimised PNG that comfortably sits inside all three limits for typical source images, but a very high-detail source can still exceed them. Flatten colours or compress the source before re-running if the platform rejects the upload.
Upscaling a small source to a large target. The generator cannot invent detail that is not in the source. A 600 by 600 image stretched to 1280 by 720 for a YouTube thumbnail will look soft no matter how it was processed. Pick the smallest target that matches the platform instead.
Reusing the Open Graph preview for a feed post. The OG Image Generator produces a 1200 by 630 link-share preview with a white letterbox. Feed posts on LinkedIn, X and YouTube are displayed at a different aspect ratio and the letterbox would show through. Use this resizer for feed posts; use the OG Image Generator for the og:image meta tag.

Sources

The dimensions on this page are taken directly from each platform's own documentation. Listed once here for the GEO / EEAT footer; the table above links each size to the same page.

LinkedIn — 1080×1080: LinkedIn Help — Image requirements for LinkedIn shares
LinkedIn — 1200×627: LinkedIn Help — Image requirements for LinkedIn shares
X — 1200×628: X Developer Docs — Cards: Summary Card with Large Image
YouTube — 1280×720: Google Help — YouTube: Add a thumbnail to your video

Related tools

Other image workflows that ship ready-to-use packages.

OG Image Generator

Turn one image into the 1200 × 630 Open Graph preview PNG used by Facebook, LinkedIn and X.

Image Compressor

Compress the resized PNG further before publishing — same format, smaller payload.