CropDen: image sizes and AI image tools

Name: CropDen: image sizes and AI image tools
Author: geektao1024

by geektao1024version 1.0.0i★ –iRuns in the cloud

Registry nameio.github.geektao1024/cropden

Install

Overview

Description from the maker (original English)

Platform image sizes with safe zones (free), plus AI extend, upscale and background removal.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi3 of 3 passedChecked from public information; code not scanned yet
UsageiVery new★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs in the cloud
Transport: Streamable HTTP
Category: Design, images & audio
You need to fill in: Authorization

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 3 of 3 passed
Runs on the maker’s server: what you ask it goes through their server.
Can do 6 things (tools) get_image_sizes, ai_extend_image, ai_upscale_image, ai_remove_background …
You fill in yourself: Authorization

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

Run this in your terminal

claude mcp add --transport http cropden https://cropden.com/mcp --header 'Authorization: your-value'

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "cropden": {
      "url": "https://cropden.com/mcp",
      "headers": {
        "Authorization": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "cropden": {
      "type": "http",
      "url": "https://cropden.com/mcp",
      "headers": {
        "Authorization": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

Authorization secret HTTP header
Bearer . Only the AI tools need it; get_image_sizes works without.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Tool names and descriptions exactly as the server reported them on Nov 6, 2026. The maker wrote them, not us; we show them as plain text.

get_image_sizes
Exact image sizes for Instagram, YouTube, TikTok, X, LinkedIn, Facebook, Discord, Twitch, Pinterest, marketplaces and passport photos, with safe zones (pixel areas the app covers or crops), upload limits and minimum sizes. Free, no API key. With no arguments it lists every size i
ai_extend_image
Extend an image to a wider or taller shape with AI, e.g. a portrait photo to a 16:9 YouTube thumbnail without cropping the subject. Costs 5 CropDen credits per run, refunded if it fails. Needs a CropDen API key. Input: PNG, JPEG or WebP, up to 10 MB and 2048 px on the longest sid
ai_upscale_image
Upscale an image 2x or 4x with AI. Costs 8 credits for 2x and 12 for 4x, refunded if it fails. Needs a CropDen API key. Input: PNG, JPEG or WebP, up to 10 MB; longest side up to 2048 px for 2x or 1024 px for 4x. Returns a link to the result, valid 7 days.
ai_remove_background
Remove the background of an image with AI; the result is a PNG with transparency. Costs 1 credit per run, refunded if it fails. Needs a CropDen API key. Input: PNG, JPEG or WebP, up to 10 MB and 2048 px on the longest side. Returns a link to the result, valid 7 days.
get_ai_task
Status of an AI run that was still working when its tool returned. Pass the task_id it gave you; wait about 10 seconds between checks.
get_credit_balance
How many CropDen credits the API key owner has left.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 9, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account geektao1024, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
✓ Pass
Endpoint responds
Responded in 1104 ms (HTTP 200)
– Not applicable
Sign-in with OAuth
No sign-in needed
✓ Pass
No hidden instructions in tool descriptions
Read 6 tool descriptions and found no hidden instructions to the AI

Compared with others in Design, images & audioi

More stars than 0% of the other 2826 servers in this category
Published to the registry more recently than 80% of the other 2826 servers in this category
Basic checks equal to or better than 100% of the other 2826 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is CropDen: image sizes and AI image tools safe?

It passed 3 of 3 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: Authorization

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.0.0) reached the registry 8 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Figma Context MCP, Claude Real Video, Figma MCP Server

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Figma Context MCP

Give your coding agent access to your Figma data. Implement designs in any framework in one-shot.

by GLipsWidely used↓ 161.2K/wk★ 16.2KUpdated 5 months ago

Runs on your computer

Install

Claude Real Video

Let any LLM watch a video locally — and search everything it has ever watched.

by HUANGCHIHHUNGLeoWidely used↓ 1.1K/wk★ 2.3KUpdated 2 months ago

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Figma MCP Server

Figma’s official server gives AI your design data so it can turn designs into code or describe them accurately. Connects to Figma’s cloud.

by figmaWidely used★ 2.2KUpdated 13 months ago

Runs in the cloud✓ mcp.figma.com

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

social-media-image-sizes

Image sizes for 14 platforms: 55 sizes with safe zones, upload limits and minimum sizes, plus specs for 6 passport and visa photos. As JSON, an npm package, an agent skill and an MCP server. Data under CC BY 4.0.

Website · JSON · 中文说明

Most size lists stop at width × height. When you crop, you also need to know what the app puts on top of your image: the profile picture over a YouTube banner, the caption bar at the bottom of a Story, the 3:4 profile grid that trims a 4:5 Instagram post. This dataset has those areas in pixels.

Quick look

One size per row. Each group has more sizes in the data.

Platform	Image	Size (px)	Ratio	Crop on CropDen
Instagram	3:4 portrait post (+3 more)	1080 × 1440	3:4	Crop
Instagram	Story (+2 more)	1080 × 1920	9:16	Crop
Instagram	Profile picture (+1 more)	320 × 320	1:1	Crop
YouTube	Channel banner (+1 more)	2560 × 1440	16:9	Crop
YouTube	Video thumbnail (4K) (+2 more)	3840 × 2160	16:9	Crop
YouTube	Short (9:16) (+1 more)	1080 × 1920	9:16	Crop
Facebook	Cover photo (+2 more)	851 × 315	2.70:1	Crop
Facebook	Feed post (4:5) (+3 more)	1080 × 1350	4:5	Crop
Discord	Profile banner (+3 more)	600 × 240	5:2	Crop
Discord	Custom emoji (+2 more)	128 × 128	1:1	Crop
LinkedIn	Profile background (+3 more)	1584 × 396	4:1	Crop
X (Twitter)	Header photo (+3 more)	1500 × 500	3:1	Crop
Twitch	Profile banner (+3 more)	1200 × 480	5:2	Crop
TikTok	Video / photo slide (+2 more)	1080 × 1920	9:16	Crop
Pinterest	Standard pin (2:3) (+2 more)	1000 × 1500	2:3	Crop
Snapchat	Story / Spotlight	1080 × 1920	9:16	Crop
Etsy	Listing photo (4:3) (+2 more)	3000 × 2250	4:3	Crop
Shopify	Product image	2048 × 2048	1:1	Crop
eBay	Listing photo	1600 × 1600	1:1	Crop
Amazon	Main product image	2000 × 2000	1:1	Crop

Passport photos (make one on CropDen):

Document	Pixels	Print size
US passport & visa	600 × 600	50.8 × 50.8 mm
UK passport	600 × 771	35 × 45 mm
EU / Schengen	600 × 771	35 × 45 mm
Canada	600 × 840	50 × 70 mm
Australia	600 × 771	35 × 45 mm
China visa	600 × 873	33 × 48 mm

All sizes and their zones are in data/social-media-image-sizes.json. To crop an image to any of them in your browser, follow the link in the last column.

Use it

npm

npm install social-media-image-sizes

import { getSize, groups } from 'social-media-image-sizes';

const post = getSize('instagram-post/portrait-34'); // { width: 1080, height: 1440, ratio: '3:4', exact: true, ... }

const youtube = groups.filter((g) => g.platform === 'YouTube');

CommonJS works too: const { getSize } = require('social-media-image-sizes').

JSON over HTTP

const res = await fetch('https://cropden.com/data/social-media-image-sizes.json');

const { groups, passportPhotos } = await res.json();

The endpoint allows cross-origin requests and is cached for an hour.

Use it with AI agents

Skill: make images in the right size

skills/social-media-image-sizes is an Agent Skill for Claude Code, Codex, Cursor and other agents that read SKILL.md. Ask "turn this photo into a YouTube banner" or "what size is an Instagram story?". It picks the size, crops the image on your machine with sharp, keeps the file under the upload limit, and draws a preview with the covered areas in red.

npx skills add geektao1024/social-media-image-sizes

Or copy the folder into ~/.claude/skills/ (Claude Code) or your agent's skills folder.

MCP server: sizes plus AI image tools

CropDen runs a remote MCP server at https://cropden.com/mcp (Streamable HTTP).

Tool	What it does	Cost
`get_image_sizes`	Sizes, safe zones and upload limits from this dataset	Free, no key
`ai_extend_image`	Extend an image to a wider or taller shape (outpainting)	5 credits
`ai_upscale_image`	Upscale 2x or 4x	8 or 12 credits
`ai_remove_background`	Transparent PNG	1 credit
`get_ai_task`, `get_credit_balance`	Check a long run, check your balance	Free, needs a key

Claude Code:

claude mcp add --transport http cropden https://cropden.com/mcp \

--header "Authorization: Bearer YOUR_CROPDEN_API_KEY"

Other clients: add https://cropden.com/mcp as a Streamable HTTP server with the same header. Get a key at cropden.com under Settings → API keys. The AI tools use the same credits as the website, and a failed run is refunded. Without a key, only get_image_sizes works.

What's in an entry

Field	Meaning
`id`	`/` , e.g. `youtube-banner/banner`
`width`, `height`	Pixels to export
`ratio`	Aspect ratio, e.g. `3:4`
`exact`	`false` means only the ratio matters
`recommended`	The size we'd pick when a group has several
`minWidth`, `minHeight`	Smallest upload the platform accepts or needs
`maxBytes`	Upload limit in bytes (1 MB = 1,000,000)
`zones`	Areas in pixels: `safe-area` (keep content inside), `ui-overlay` (covered by the app), `crop-preview` (what another view shows)
`zones[].measured`	Measured in the live app; the platform doesn't publish it
`zones[].x`, `y`, ...	Pixels from the top-left of the image. A zone can reach past the edge, like a profile picture that overlaps the bottom of a banner
`note`	One-line tip, in English and Chinese

Each group also has formats, facts (video length and similar), verified and a url to crop on CropDen. Passport photos add print size in millimetres and head and eye-line ranges as fractions of the photo height.

How the numbers are checked

Platform help pages come first. Where a platform publishes nothing (Instagram profile pictures, for example), we use the size current guides agree on.
Zones with measured: true were measured in the apps. Apps move their buttons around, so treat those as guides.
verified is the month a group was last checked. Source links for every group are coming in 0.2.0.
Found a size that's out of date? Open an issue with a link to the source.

If you only want values the platforms document themselves, use The Social Specification, which marks everything else as not documented. This dataset is made for cropping, so it fills those gaps with practical sizes and safe zones.

On the website

CropDen does the cropping. Pick a size, see the safe zones over your own image, and export at the exact pixel size and under the upload limit. The crop and resize tools run in your browser. The site also has batch resizing and AI tools: extend, upscale and remove background.

License

Data (data/, and the same data in index.js and index.cjs): CC BY 4.0. Credit it like this: Image size data by CropDen (https://cropden.com), CC BY 4.0. On a website, the link is enough.
Code: MIT.

Thanks

SammaPix (MIT) was our starting reference for which platforms and passport photos to cover, and we cross-checked sizes against its data files.

If this saved you a lookup, a star helps other people find it.

Built in public by Geektao (@geektao0319, posts in Chinese).

CropDen: image sizes and AI image tools

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Design, images & audioi

Common questions

Alternatives

Figma Context MCP

Claude Real Video

Figma MCP Server

README from the maker

social-media-image-sizes

Quick look

Use it

npm

JSON over HTTP

Use it with AI agents

Skill: make images in the right size

MCP server: sizes plus AI image tools

What's in an entry

How the numbers are checked

On the website

License

Thanks