Keto barcode scanner and carb checker

How Keto Peek works

1. Scan, upload, or type. Scan a retail barcode with your phone camera, snap or upload a photo of the nutrition label, or type a product or food name. Works in your browser — no app to download.
2. We read the nutrition facts. Keto Peek pulls data from food databases (Open Food Facts, USDA FoodData Central) or reads your label photo to extract macros and ingredients.
3. Get a keto verdict. You get a clear result — Excellent, Good, Caution, Avoid, or Unknown — with net carbs, added sugar status, and any ingredient flags, in seconds.

What Keto Peek checks before giving a verdict

• Net carbs. Total carbs minus fiber and sugar alcohol grams when the nutrition facts list them — same rules as the rest of the app.
• Added sugar called out on the label when available.
• Ingredient flags for things like maltodextrin, high-fructose corn syrup, and other starch- or sugar-related phrases we can spot in the ingredient text.
• Serving-size traps — unrealistically small servings that can hide how carb-heavy a package really is.
• Incomplete or missing data — when we can't compute net carbs reliably, you'll see an Unknown verdict instead of a guess.

What Excellent, Good, Caution, Avoid, and Unknown mean

Every Keto Peek result is based on a real-time analysis of net carbs, added sugars, and ingredient quality. Here is how to interpret your results:

Excellent

The best choice for a ketogenic lifestyle. These foods feature very low net carbs and contain no added sugars.

Good

A solid keto option for most people. These fit within your daily goals as long as you are mindful of the serving size and your total carb budget for the day.

Caution

Proceed with care. While a "Caution" verdict can be triggered by "red flag" ingredients like maltodextrin, it often simply means the carb count is high enough that you must be extremely careful with your portion size. You may be able to fit a small amount into your day, but it is easy to overdo it.

Avoid

Typically not recommended. These products are high in net carbs or added sugars, making them difficult to fit into a standard keto approach. While you can technically fit a tiny amount of almost any food into a daily carb limit, these items make it much harder to stay in ketosis.

Unknown

Information not found. This usually means that the verified databases we connect to—such as Open Food Facts or the USDA FoodData Central—do not yet have enough structured nutrition data for this specific product.

Why use a keto barcode scanner?

Even "Low Carb" labels can be misleading. Processed foods often use industry loopholes to hide ingredients that stall ketosis. Keto Peek helps you see past the marketing.

Watch for "Hidden" Carbs

• Deceptive Sweeteners: Ingredients like maltitol or sorbitol have a high glycemic index, yet are often subtracted from "Net Carb" counts on the box.
• Hidden Starches: Fillers like maltodextrin, corn starch, and modified food starch are common in "keto-friendly" snacks but can cause insulin spikes.
• The "Zero" Trap: Under FDA rules, a product can claim "0g Sugar" if it contains less than 0.5g per serving. Those half-grams add up fast if you aren't counting.

Real-Time Decisions

Grocery shopping shouldn't be a math test. Keto Peek handles the complex calculations instantly, cross-referencing your item against known keto "red flags" so you can shop with confidence.

No app to download, no account to create — open it in your phone browser and scan.

Common keto shopping moments

• Scanning products at the grocery store.
• Quickly checking a snack before you buy.
• Comparing two similar products side by side.
• Reviewing a nutrition label photo someone sent you.
• Double-checking foods that claim "low carb" or "no sugar added."

How accurate is Keto Peek?

• Results depend on how complete the label data is — ingredients, serving size, and what the database or OCR captured.
• Data comes from Open Food Facts, USDA FoodData Central, and label reading — not made-up numbers.
• Keto Peek helps you decide faster in the aisle; it isn't medical or personalized nutrition advice.
• When data is missing or ambiguous, we'll say Unknown and suggest a better next step (barcode, photo, or name).

Common keto scanning questions

Explore more keto food guides

Deeper "is this food keto?" guides are on the roadmap. When they ship, you'll find them linked here with clear titles — not generic "learn more" links.