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How-to Guide

Create a Screenshot Grid for Your GitHub README

A GitHub README with a compelling screenshot grid instantly communicates what your project looks like, what it does, and why it's worth cloning — in the 5 seconds a developer spends evaluating a new repo.

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Stars, forks, and contributions all start with first impressions. A GitHub README that leads with a high-quality screenshot grid dramatically outperforms text-only READMEs in attracting contributors and users.

The most effective README grid layouts: (1) light mode + dark mode side by side (1×2) — shows theme support instantly, (2) 3 key screens of your app (1×3) — homepage, feature page, settings, (3) feature highlight grid (2×2) — each cell shows one distinct feature with a caption below.

For open-source projects, showing your project in multiple contexts (desktop, tablet, mobile in a responsive grid) signals professional-grade implementation and attracts trust from senior contributors.

GitHub Markdown supports standard image embedding with `![alt](url)` syntax. Upload your grid PNG to the repository itself (under `/docs/` or `/assets/`) and reference it with a relative path. This ensures the image is always available and versioned with the repo. Alternatively, upload to Imgur and link directly — though this creates an external dependency.

For the best layout in Markdown, use an HTML table to control image width and side-by-side placement, as Markdown native image embedding doesn't support inline layout.

How to Do It — Step by Step

  1. 1

    Decide on your grid story

    Pick 2–4 key views: dark/light mode pair, key app screens, or feature highlights. Each cell should answer 'what does this project look like?'

  2. 2

    Capture consistent screenshots

    Same window size (e.g., 1280×800), same scale factor. For mobile apps, use a device frame emulator or browser DevTools device mode.

  3. 3

    Open MergeFrame and build your grid

    Go to mergeframe.com. Select your layout and drop in your screenshots.

  4. 4

    Export at 1920px wide

    Wide export ensures the grid is sharp even when GitHub compresses images in the README rendering.

  5. 5

    Commit and reference in README

    Add the PNG to /docs/screenshots/ in your repo and embed it at the top of your README with an appropriate alt text.

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Frequently Asked Questions

Should I use GIF or PNG for GitHub README screenshots?

PNG for static views — it's sharper and smaller than GIF for non-animated content. Use GIF only for interactive demonstrations. For complex animations, consider WebP — GitHub READMEs support it.

Where should the screenshot grid appear in the README?

Immediately after your project description and badges, before the installation instructions. The grid is your visual hook — put it where the reader's eye naturally goes first.

How wide should images be in a GitHub README?

GitHub caps image width at the README column width (~820px). Export at 1640px and GitHub will display it sharp at 820px effective width on high-DPI screens.

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