A good logo used to mean a designer, a week of back-and-forth, and a few hundred dollars. In 2026 you can generate ten solid logo concepts in the time it takes to write a brief — using Nano Banana, Google's Gemini image model. The catch most tutorials miss: Nano Banana isn't a one-click "logo maker" website, and a raw AI image isn't a finished logo. This guide shows you the real workflow — from prompt to a scalable, usable file.
Difficulty: Beginner-friendly · Required tools: the Gemini app or Google AI Studio (Nano Banana is built in — free tier is enough), plus a vector step (Nano Banana 2's vectorize or any SVG converter) · Updated: July 2026
Overview
First, what Nano Banana actually is — because the name is confusing. "Nano Banana" is Google's brand for Gemini's native image generation, and in 2026 it's a family: Nano Banana 2 (the versatile workhorse, great 4K output and — crucially for logos — crisp text rendering), Nano Banana 2 Lite (fastest and cheapest), and Nano Banana Pro (the premium tier with the best brand consistency and precision). You reach all of them inside the Gemini app (tools → 🍌 Create images) or in Google AI Studio / the Gemini API — not a separate "nanobanana.ai" logo site.
Why it's genuinely good for logos now: the thing that used to make AI useless for branding — garbled text — is largely fixed. Nano Banana 2 renders legible, clean type, which makes it viable for wordmarks and monograms, not just abstract icons. And its real superpower is conversational editing: you don't generate a hundred random logos hoping one lands — you generate a concept, then refine it in plain language ("same mark, but flatter and in one color," "swap the leaf for a coffee bean," "make it bolder"). That iterate-in-a-conversation loop is what replaces a designer's revision rounds.
Two honest limits to keep in front of you. A generated image is a raster (PNG) with an invisible-and-visible SynthID watermark marking it as AI-made; to use it as a real logo you'll want to vectorize it (so it scales to a billboard or a favicon) and be aware of the watermark and of trademark risk — AI can unknowingly echo an existing mark. We handle both in the steps.
The honest goal: by the end you'll be able to go from a one-line business idea to ten logo concepts, refine the best one conversationally, test it like a designer would, and export a clean, scalable file you can actually use — while knowing the originality and trademark checks to run before you put it on anything.
Who This Is Useful For
What You Will Learn
What You Need
The 7 Steps
Step 1: Open Nano Banana in the right place and pick a tier
In the Gemini app, open the tools menu and choose 🍌 Create images; you can select Fast, Thinking, or Pro. For most logo work, Nano Banana 2 is the sweet spot; switch to Nano Banana Pro when you need tighter brand precision or accurate text. Ignore any third-party site claiming to be "the Nano Banana logo generator" — you want the real model inside Gemini or AI Studio.
Pro tip: Start on the standard (Fast/Nano Banana 2) tier for exploration — it's quick and cheap for generating lots of concepts — and only move to Pro once you've picked a direction worth polishing.
Step 2: Write the brief before you write the prompt
Two minutes here beats twenty minutes of random generations. Nail down: the name, what the business does, its personality (three adjectives — e.g. "warm, handmade, trustworthy"), a style (minimalist, geometric, vintage badge, lettermark), and any colors. That brief is the raw material for a prompt that returns something on-brand instead of generic.
Pro tip: Write the three personality adjectives first. "Playful, bold, modern" and "elegant, quiet, premium" produce completely different logos from the same business name — the adjectives steer the whole result.
Step 3: Prompt for concepts, and generate a batch
Turn the brief into a specific prompt. A reliable shape: "A [style] logo for [name], a [what it does]. [Symbol idea]. [Personality] feel, [colors], flat vector style, solid white background, no realistic photo elements." Run it several times (or ask for variations) to get your ten concepts — each generation gives you a different take to react to.
A minimalist geometric logo for "Green Bites", a small vegan bakery.
A simple leaf that doubles as a bread loaf. Warm, handmade, friendly feel.
Sage green and cream, flat vector style, solid white background, no photo elements.
Pro tip: Ask for the mark on a plain white background in flat vector style explicitly. It keeps the output clean and icon-like — far easier to refine and vectorize than a shaded, 3D, or photographic render.
Step 4: Refine the best one conversationally
This is where Nano Banana beats a "generate 100 and pray" tool. Pick your strongest concept and talk to it: "keep this mark but make it one solid color," "simplify the details so it reads at small sizes," "try the wordmark in a rounder typeface," "remove the gradient." Each instruction edits the same logo instead of rolling the dice again. Two or three rounds usually gets you from concept to keeper.
Pro tip: Change one thing per instruction. "Make it flatter" then "now try it in navy" gives you control and a trail you can walk back; asking for five changes at once makes it hard to tell which one helped.
Step 5: Stress-test it like a designer
A logo that only looks good big and in color isn't finished. Ask Nano Banana to show it in one color (pure black on white), very small (favicon size), and on a dark background. A strong logo survives all three; if it turns to mush at 32 pixels or falls apart in black-and-white, refine it further before you commit.
Pro tip: The one-color black-and-white test is the fastest quality filter there is. If the shape still reads with all color and detail stripped away, the logo has good "bones" — that's the mark of a design that will work everywhere.
Step 6: Get a scalable, usable file
A raster PNG blurs when you enlarge it, so convert your final logo to SVG (a vector) — use Nano Banana 2's vectorize option or any raster-to-SVG converter. A vector scales cleanly from a favicon to a billboard and is what print shops and web frameworks expect. Export clean PNGs too for quick social use.
Pro tip: Keep a master SVG plus a few sized PNGs (favicon, social avatar, header). Doing the exports once means you never have to regenerate the logo just to get the right dimensions later.
Step 7: Check originality, watermark, and trademark before you use it
Before this goes on a product or a storefront, run three checks. Watermark: Nano Banana images carry a SynthID watermark marking them AI-generated — know it's there. Originality: do a reverse-image search to make sure the AI didn't echo an existing logo. Trademark: search your local trademark database for anything confusingly similar in your industry before you build a brand on it.
Pro tip: Do the trademark check before you fall in love with a design and print business cards — a five-minute search up front is far cheaper than a rebrand (or a legal letter) later.
3 Common Mistakes to Avoid
Going Further
Key Takeaways
Sources: Gemini Image – Nano Banana — Google DeepMind · Nano Banana Pro — Google Blog · Image generation — Gemini API docs · Nano Banana 2 image generation — Gemini