Free Online Grid Overlay Tool — Overlay Grids on Any Image
Overlay a custom grid on any image with our free online grid overlay tool. Adjust grid spacing, line color, and opacity to suit your needs. Perfect for designers checking alignment, photographers applying the rule of thirds, or anyone needing precise visual reference lines on images. All processing happens locally in your browser.
Upload an image to apply the grid overlay.
Adjust the grid size, line color, and opacity using the controls.
Use the grid as a visual reference for alignment and composition.
Tips for Using the Grid Overlay
- Use the Rule of Thirds preset for photo composition analysis.
- Adjust opacity to make the grid subtle enough to see the image underneath.
- Smaller grid sizes are useful for precise pixel-level alignment checks.
Frequently Asked Questions — Grid Overlay
Is the grid overlay tool free?
Yes, completely free. No registration, no hidden charges, and no file size limits. All processing happens locally in your browser.
How does the grid overlay work?
The tool draws horizontal and vertical lines on a canvas overlay at your specified spacing.
What grid sizes can I use?
You can set any grid size from 10 to 200 pixels, or use presets: Small (20px), Medium (50px), Large (100px), and Rule of Thirds.
Can I customize the grid appearance?
Yes, change the line color and adjust the opacity with a slider.
What image formats are supported?
All common image formats are supported: JPEG, PNG, WebP, GIF, BMP, TIFF, and more.
Does the grid modify my image?
No, the grid is drawn on a transparent overlay canvas. Your original image is never modified.
Can I upload multiple images?
Yes, upload multiple images and switch between them with the grid settings preserved.