WeChat Official Account Image Compressor

Engineered for WeChat editors and content managers. Fits the official 2.35:1 (900×383) header spec and compresses long infographics under 5MB for fast mobile loading.

Yes — drop your article headers or infographic banners into the tool below. ImgMin automatically crops to the official 2.35:1 aspect ratio (900×383 px) or optimizes long article images below WeChat's 5MB upload limit without blur. 100% local processing safeguards unreleased editorial content.

Click, drag or paste images here

Maximum 20 images at a time

Advanced Settings

Target size Choose a common limit or enter a custom value

Custom limit (KB, optional)

Output format

Leave blank for normal compression. 1 KB = 1000 bytes. With a target, JPEG/WebP quality follows the selected strategy. PNG keeps transparency and may exceed the target.

Resize

Platform preset

Width (px)

Height (px)

Batch Rename

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100% Private

Images never leave your browser

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Instant Results

Hardware-accelerated Canvas API

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Batch Processing

Process up to 20 files with ZIP download

Specifications & Target Limits

Requirement / Property	Specification
Official Header Dimensions	2.35:1 Ratio (900 × 383 px for top story preview)
Secondary Thumbnail Ratio	1:1 Ratio (200 × 200 px for feed sharing)
Platform Single Image Limit	Single image ≤ 5 MB (Recommended ≤ 1 MB for instant load)
Recommended Format	JPEG / WebP
Data Privacy	100% Client-Side Processing (Zero leaks of unreleased media)

How It Works (Step-by-Step)

Drop your header or long infographic Drag your cover art, chart, or long article image into the tool.
Verify 900×383 dimensions and compression The tool automatically pre-sets the 2.35:1 crop and balances fidelity with speed.
Download and insert into WeChat Editor Download your ready-to-use image and paste directly into the WeChat Official Accounts backend.

Frequently Asked Questions

What is the optimal size for a WeChat article header?

WeChat specifies a 2.35:1 aspect ratio with recommended dimensions of 900×383 pixels. Non-standard dimensions result in awkward cropping in user chat feeds.

How can I fix long infographic images exceeding the 5MB limit?

ImgMin preserves full infographic height while applying color quantization to shrink file size by 60–80%, bringing 10MB+ long images well below 5MB.

Is unreleased commercial content safe in ImgMin?

Completely safe. ImgMin has no server backend; all processing executes locally in your browser with zero data leaving your machine.