Free logo checker
Test your logo the way it will really be used: as a tiny favicon, on light and dark backgrounds, in one color and in print. The logo checker gives you a score and clear fixes in seconds.
Drop your logo here
PNG, JPG, WebP or SVG, up to 10 MB. You can also paste it.
Checked in your browser. Your file is never uploaded.
What the logo checker tests
Six checks that decide whether a logo works everywhere, from a browser tab to a shop sign.
Transparent background
A logo should sit on any color, photo or page without a box around it. The checker spots a solid background and tells you its color.
File quality
Resolution for screens and print, and whether an SVG is a true vector or only wraps a picture, which many tools hand out. The SVGs from our AI logo generator are real vectors.
Small sizes
Your logo shrunk to a 32 px favicon and app icon: does it keep its shape, or do fine lines and small text turn to blur? Simple, bold marks hold up best: see our logo ideas.
Light and dark backgrounds
How much of the logo still stands out on white and on dark colors, so you know when you need a reversed version.
Colors
The palette it really uses, and whether gradients or many colors will make print, embroidery and signs harder. In our logo maker you can change every color.
Shape
Very wide or tall logos turn tiny in square spots like social avatars and app icons. The checker measures the proportions.
22 px
How to fix what the logo checker finds
A low score rarely means a bad logo. Usually it means a missing version or the wrong file, and both can be fixed without starting over.
How the score works
Each of the six checks passes, is worth a look or needs fixing, and the score out of 100 weighs them. Small sizes count the most; colors and shape count least.
Read the result as a to-do list, not a verdict. A long wordmark can lose points for its shape and still be the right main logo, as long as you keep a square version too. For more on testing a logo, read our logo checker guides.
Small sizes and favicons
A favicon is the little icon in a browser tab, usually 16 or 32 pixels wide. The checker shrinks your logo to 32 pixels on its longer side and measures how much detail survives. Thin lines, small lettering, a slogan and detailed illustrations blur first, and a wide logo ends up only a few pixels tall. Shading and highlights need room too, so a logo from our 3D logo maker looks its best large; give the tab a flat icon instead.
The fix is an icon version: your symbol or initial on its own, with thicker lines and no small text. When one of our templates has a symbol and a name, its download includes each as a separate file.
Light and dark backgrounds
Here the checker measures how much of your logo stands out on white and on dark navy. It compares lightness, not hue, because lightness is what separates a shape from its background. If your file has its own background, the logo is tested against that.
Dark logos vanish on dark headers and photos, and pale ones fade on white. Keep a reversed version, usually all white, plus a black one for stamps and engraving. Logos made from our templates download with both, and our logo maker lets you recolor a design yourself.
Transparent backgrounds
The checker looks at the edges of your image. Transparent pixels there mean the logo can sit on anything. A flat color all the way round means it comes in a box, and the checker names that color.
JPEGs can’t be transparent, and a screenshot captures whatever was behind the logo. Watch for PNGs with a gray-and-white checkerboard painted in: they look transparent in a preview, but the pattern is part of the picture. Export again from the original design as a PNG with transparency, or use the SVG. Cutting a logo out by hand tends to leave a pale fringe that shows on dark colors.
Fake SVGs and low resolution
A real SVG is made of shapes and paths, so it stays sharp at any size. Some tools hand out an SVG that only wraps a pixel image, which blurs like any PNG when enlarged. The checker flags those.
For PNG, JPEG and WebP files, it reads the size. Resolution is how many pixels an image has, and enlarging a small file only gives you bigger, blurrier pixels. A long side of 1,500 pixels or more passes. From 800 to 1,499 is fine on screens but not in print, and under 800 fails. A JPEG never fully passes, since it can’t be transparent. Keep a real vector for print and a PNG of at least 2,000 pixels for screens. The SVGs from our AI logo generator are traced into real shapes, never a picture in a frame.
Too many colors
The checker counts your logo’s main colors and ignores tiny specks. Up to three passes; more than that, or gradients and textures, is worth a look. On screen, extra colors are free. In print they add up: screen printing needs a separate screen for each color, and embroidery a separate thread. Keep a flat version in two or three colors, plus a one-color version for stamps. If your main logo is 3D or painted, that flat version is the one for embroidery and screen printing.
Very wide or tall logos
The last check measures your logo’s proportions. A logo up to about 2.6 times as wide as it is tall fits a square comfortably; past 4.5 times, it fails. Avatars, app icons and favicons are square or round, so a long wordmark shrinks to a thin strip inside them. Keep a stacked version with the symbol above the name. Our guide on how to use a logo maker helps you pick a layout for the places your logo appears most.
Which file to use where
A DepthLogo download sorts the files into folders, with a README that says which goes where. Our guide to logo file formats explains each one. The short version:
- For your website or online store, the SVG, or a transparent PNG or WebP about twice the size it shows on screen.
- In the browser tab, the favicon set, made from your icon rather than the full logo.
- On a phone’s home screen, the 180-pixel Apple touch icon and the 192 and 512-pixel icons.
- For social profiles, a square picture of your icon on your brand color, since most networks crop it to a circle.
- On business cards and anything else printed, the PDF or the SVG.
- On signs, embroidery or engravings, the SVG in flat colors, or the one-color version.
- In email signatures and documents, a PNG, because many of those apps can’t show an SVG.
Logo checker questions
Need a logo that passes? Try the AI logo generator or start from logo templates.
Yes. Check as many logos as you like, with no sign-up and no watermark on the results.
No. The logo checker runs entirely in your browser: your file never leaves your device.
The checker rates 85 and up as Excellent, 70 and up as Good, and 50 and up as Needs work. One file rarely aces everything, and that’s fine: most fixes mean adding a version, like an icon for favicons or a white logo for dark backgrounds, not redesigning your main logo. For each warning in turn, see what to fix before you use your logo.
Keep a vector SVG for print and signs, and a PNG of at least 2000 px on its long side for screens. For favicons and app icons, use a simplified icon version. Every logo from our AI logo generator comes with these files, favicons and app icons included. Our logo size guide covers the rest, from website headers to print.
Without one, the logo carries a box of its background color onto every page, photo and product it is placed on. A transparent PNG or an SVG sits cleanly on anything.
Usually because the background is part of the image: a white box, or a gray-and-white checkerboard that only looks transparent. Renaming a JPEG to .png doesn’t help either. Export the logo again from its original design with transparency turned on, or use the SVG.
Keep a reversed version, usually the same logo in white or light colors. If the checker says your logo fades on dark backgrounds, that is the version to add. In our free logo maker you can recolor a template or SVG logo for dark backgrounds.
Often with a warning or two, and that’s normal. Shading and highlights blur at favicon size, and a 3D logo isn’t the flat color that embroidery and screen printing need. Use it where it shows large, like your website or packaging, and keep a flat icon and a one-color version for everything else.
No. Some tools save a pixel image inside an SVG file, which blurs when enlarged just like a PNG. The checker tells you when an SVG only wraps a picture.
No. It checks design and file quality, not trademarks. Before you register a logo, search your country’s trademark register, such as the USPTO in the US or the EUIPO in the EU.