Is MergeFrame really free?

Yes, MergeFrame offers a free version with PNG + JPG 4000px export, 2 exports per day and 8 grid types. The Pro version ($7/month) unlocks unlimited exports, all import formats and customizable grids.

Are my images uploaded to a server?

No. MergeFrame processes your images exclusively in your browser via the Canvas API. No images are uploaded to a third-party server. MergeFrame cannot see, store or access your images.

What image formats are supported?

MergeFrame supports all common image formats: PNG, JPEG, WebP, SVG, GIF and BMP. Export is in high-resolution PNG at up to 4000px, on the free plan and on paid plans alike.

Can I use MergeFrame on mobile?

Yes, MergeFrame is responsive and works on all modern browsers (Chrome, Firefox, Safari, Edge) on desktop, tablet and mobile.

How-to Guide

Merge Screenshots into a Grid for Claude Vision Analysis

Structuring screenshots into a grid before uploading gives Claude more coherent multi-image reasoning.

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Claude's vision model is uniquely strong at reading and reasoning about text within images: ideal for code screenshots, documentation, UI labels, and data tables. Like all vision models, Claude receives separate attachments as separate inputs. A merged grid transforms analysis from 'three descriptions' to 'comparative analysis of three states.'

Claude-specific optimization: (1) Higher resolution: Claude handles large images well. Export 2048–3000px. (2) Text-heavy screenshots benefit from larger cells: give code and tables more grid real estate. (3) Claude excels at following structured instructions: describe your grid in detail. (4) For code review: Strip of 3 (original → suggested changes → expected output).

Claude also accepts PDF uploads. Alternative workflow: build grid in MergeFrame, export PNG, embed in PDF with annotations for richer analysis.

How to Do It: Step by Step

1
Capture at high resolution
Claude handles large images well. Use high-DPI captures.
2
Open MergeFrame, build grid
For text-heavy content, use larger cells (2×2 rather than 3×3).
3
Add labels and annotations
Claude excels at reading text in images. Clear labels for precision.
4
Export at 2048–3000px
Claude benefits from higher resolution. Upper range for text-heavy grids.
5
Upload with detailed prompt
Claude follows instructions precisely. Describe each cell's content.

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Frequently Asked Questions

Which Claude model for image grids?

Any Claude vision model can read a grid. Just describe the layout in your prompt.

Does Claude handle text in grids better than ChatGPT?

Both can read text in a grid; the result depends on the task and the prompt. A clearly labelled grid helps either model.

Can I use grids with Claude's API?

Yes. Pass grid as base64 in vision content block. Include grid structure in system prompt.

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Free step-by-step guides from the same use case and from adjacent ones.

Optional: 10 social media grid templates you can import in one click, plus occasional MergeFrame tips. The tool stays 100% free and account-free: it is a bonus.

MergeFrame: Combine images into a grid. Free. No account. Browser-only.

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Combine Images Into a Grid, Free Online Tool