---
title: "AI Image Aspect Ratio Helper | Offlair"
description: "Choose an AI image aspect ratio and practical dimensions for square, portrait, landscape, social, presentation, and wallpaper formats."
canonical: "https://offlair.diffwise.app/tools/aspect-ratio-helper"
---

[Home](/) / [Free AI tools](/tools) / AI image aspect ratio helper for practical dimensions. FREE ASPECT RATIO HELPER
# AI image aspect ratio helper for practical dimensions.
Select a common image format and output size. The helper recommends practical dimensions for a local generation workflow.
Common content formats 64-pixel dimension steps Clear orientation guidance

Private browser logic. This form makes no request to an external AI service.
RECOMMENDED DIMENSIONS 832 × 1024 Portraits and feed posts
Named ratio 4:5 Output ratio 0.81 :1
[Join the launch list](/launch) The share link includes this output in its URL fragment. Offlair does not upload it.

Test the result on your device. Larger images can use more memory and take longer.

HOW TO USE THIS TOOL
## A clear starting point, ready in seconds.
The helper keeps both dimensions in 64-pixel steps. Some results closely approximate the named ratio to preserve those practical dimensions.

- 0 1 Choose the intended image format.
- 0 2 Select a conservative or larger long edge.
- 0 3 Copy the recommended dimensions into your app.

COMMON QUESTIONS
## Answers about this free tool.

### What is an image aspect ratio? +
An aspect ratio describes the relationship between image width and height. A 1:1 image is square.

### Why does this tool use multiples of 64? +
Many local diffusion workflows handle dimensions in regular steps. Multiples of 64 provide practical starting points for broad compatibility.

### Which aspect ratio should I use for a portrait? +
Use 4:5 for a close portrait or social post. Use 2:3 for a taller editorial composition.

KEEP BUILDING
## Related free AI image tools.

[Free AI image prompt generator from a simple idea. Build a detailed prompt from guided creative choices.](/tools/ai-prompt-generator)[Local AI image settings helper for your device. Choose practical starting settings for your device.](/tools/local-settings-helper)[Free AI prompt enhancer for your existing text. Expand a short prompt with useful visual details.](/tools/prompt-enhancer)

LOCAL. PRIVATE. CLEAR LIMITS.
## Take your prompt into a private local studio.
Offlair generates images on compatible devices after account verification and model setup.

[How Offlair works](/offline)

Source: https://offlair.diffwise.app/tools/aspect-ratio-helper