Does this tool crop or resize my image?

No. It only draws a guide overlay on top of the image you upload so you can see where the safe area falls. The original image dimensions and pixels are never modified.

Are the preset percentages exact platform specifications?

They are practical approximations based on publicly documented safe-zone guidance for each platform. Always confirm exact pixel specs with the platform before final export if precision matters.

Is my image uploaded to a server?

No. The image is read and rendered entirely in your browser using the Canvas API. It never leaves your device.

Can I set different margins for each side?

Yes. Turn on "Set each side independently" to enter separate top, bottom, left, and right percentages instead of one symmetric value.

What does the downloaded preview contain?

A PNG of your uploaded image with the safe-area guide and shaded unsafe zone burned in, sized to match what you see on screen.

Banner Safe Area Checker

Name: Banner Safe Area Checker
Availability: InStock
Author: Nham Vu

Upload a banner or ad creative, then overlay a percentage or preset safe-area guide to check nothing important sits where it could get cropped or covered.

Upload & Guides

Click or drop a banner image

PNG, JPG, or WebP up to 20MB

Safe-area preset

Top / bottom margin10%

Left / right margin10%

Set each side independently Shade the unsafe zone

Upload a banner or ad creative to preview safe-area guides

Summary

Upload a banner or ad creative, then overlay a percentage or preset safe-area guide to check nothing important sits where it could get cropped or covered.

How it works

Click the upload zone or drag a banner image onto it.
Pick a safe-area preset, or leave it on Custom and drag the margin sliders.
Turn on independent sides if the top, bottom, left, and right margins should differ.
The guide redraws instantly with the unsafe zone shaded so it stands out.
Check the safe-area pixel dimensions shown below the image, then download the annotated preview to share.

Use cases

Check a display ad creative keeps its headline inside the platform-safe zone.
Verify a YouTube or Twitch banner will not be covered by profile art or channel icons.
Confirm a social media cover photo keeps faces and text away from cropped edges.
Review a print-adjacent banner for a consistent margin before export.
Share an annotated preview with a client or teammate without opening design software.
Spot-check several banner sizes against the same percentage margin quickly.

Frequently Asked Questions

Last updated: 2026-07-22 · Reviewed by Nham Vu