OnlineGridMaker

OnlineGridMaker: Free Browser-Based Grid Overlay for Artists

OnlineGridMaker is a free, no-signup tool that places a precise grid overlay over any reference image, helping artists transfer proportions accurately using the classic grid method. Everything runs entirely in the browser — images are never uploaded to a server — making it a fast, private way to prepare reference material for portrait, landscape, wildlife, comic, and architectural drawing.

Key Features

1. Fully Customizable Grids: Control rows, columns, line color, line width, and opacity to match any reference image or drawing style — from a loose 3×3 sketch grid to a detailed 12×16 layout for complex subjects.
2. Grid Cell Labels: Optional A1, B2-style coordinate labels make section-by-section copying easier, especially for beginners working on portraits or detailed studies.
3. Multiple Grid Types: Switch between square grids and custom rectangular layouts to match the aspect ratio of your subject.
4. Paper Format Presets: Snap the grid to standard drawing paper sizes — A3, A4, A5, Letter, Legal — or define a custom width and height in millimeters before printing.
5. Image Overlay & Black-and-White Conversion: Apply the grid directly on top of your source image and optionally convert to black and white for value studies.
6. PNG Export: Download the gridded reference as a clean PNG, ready to print or use on a tablet.
7. 100% Local Processing: Images stay on your device — nothing is uploaded, no account is required, and there are no usage limits.
8. Broad Format Support: Accepts JPG, PNG, WebP, and static GIF files up to 100MB and 30 megapixels.

Who It's For

OnlineGridMaker is built for traditional and digital artists who use the grid method to scale and transfer references. It suits:

- Portrait, figure, and wildlife artists who need accurate proportions
- Landscape and plein-air painters preparing studio references
- Comic and illustration artists laying out panels
- Architecture and perspective students mapping out city scenes
- Beginners learning to measure and translate proportions

Benefits for Users

1. Privacy by Default: Because all processing happens client-side, sensitive or commissioned reference images never leave the browser.
2. No Friction: No account, no paywall, no watermark — open the site, upload, adjust, download.
3. Print-Ready Output: Paper-size presets and grid density recommendations make it easy to produce a reference that lines up with the physical paper on your desk.
4. Adaptable Detail: Start with a simple 3×3 grid for fast placement and increase density only when the subject demands more measuring points.

Conclusion

OnlineGridMaker strips the grid-method workflow down to its essentials: upload, configure, download. By keeping everything local and free, it removes the usual friction of online art tools and gives artists a reliable way to scale references for any drawing surface — from a sketchbook page to a large canvas.