Nano Banana:無料AI画像生成|テキストから画像へ

なぜ BanaGen が最高なのかNano Banana AI画像生成

Powered by Google Gemini 3.1 Pro Image

タイポグラフィ

革新的な
テキストレンダリング

AIテキスト生成:インフォグラフィック、メニュー、ポスター、マーケティング資料に読みやすくスタイリッシュなテキストを生成。100以上の言語をサポートし、スペルミスゼロ。ソーシャルメディアグラフィックやプロの図表作成に最適。

BanaGenを無料で試す
AI-generated image with perfect text rendering powered by BanaGen.
Anime-style astronaut walking through colorful alien flowers on a desert planet — AI art by BanaGen
品質

4K Ultra HD
解像度

ネイティブ2K生成と4Kアップスケーリング。シャープな素材の詳細、安定したアイデンティティの保持、複雑なシーンでの一貫した照明。印刷や大型ディスプレイに対応した制作レベルの品質。

BanaGenを無料で試す
継続性

アニメキャラクター
一貫性

Keep the same face, style, and look across multiple images. Perfect for manga, game characters, and brand campaigns. Just upload a reference image and BanaGen handles the rest.

BanaGenを無料で試す
Anime girl with silver hair in a cozy indoor cafe scene — character consistency demo by BanaGen AISame anime character with silver hair under cherry blossoms outdoors — consistent style by BanaGen AIFront portrait of anime girl with silver hair and blue eyes — Nano Banana AI character consistencySide portrait of the same silver-haired anime character — style consistency across scenes by BanaGen AI
Lightning fast generation speed
Speed

Generate
at Lightning Speed

A 4K image renders in about 10 seconds. Switch to Flash mode and results are nearly instant — no queue, no waiting.

BanaGenを無料で試す
Watermark

Clean Images,
Hidden Signature

Every image is signed with Google's SynthID — an invisible watermark you can't see, but proves authenticity. Your output is always clean, shareable, and ready to use.

BanaGenを無料で試す
Watermark-free AI-generated image output — clean results by Nano Banana AI on BanaGen

AI画像生成の比較

BanaGen vs 他のAI画像生成ツール

BanaGenがMidjourney、DALL-E 3、Fluxとテキストから画像、画像から画像、クリエイターにとって最も重要な機能でどう比較されるかをご覧ください。

機能 BanaGen
Nano Banana Free
Midjourney DALL-E 3 Flux
完璧なテキストレンダリング Yes No Yes No
最大解像度 4K (4096px) 2K (2048px) 1024px 4MP (~2000px)
キャラクターの一貫性 Yes Yes No No
参照画像 最大10枚 最大5枚 1 1
Google検索統合 Yes No No No
APIアクセス Yes No Yes Yes

Data based on publicly available information as of . Features may vary by plan and version.

BanaGenの使い方

Nano Bananaの使い方 3つの簡単なステップで

Google AI Studio、Gemini App、当社プラットフォームで動作します。 チュートリアルを見るか、以下の手順に従ってください。

1

登録して無料クレジットを取得

Googleワンタップログインで無料アカウントを作成。初回ログイン時に24の無料クレジットを即座に受け取り、テキストから画像と画像から画像を試せます — クレジットカード不要。

2

ビジョンを説明

作成したいものを説明する詳細なテキストから画像のプロンプトを書きます。必要に応じて参照画像をアップロード(最大10枚)して画像変換。解像度、アスペクト比、スタイルの好みを選択。

3

Enjoy the Result

Download your image instantly — no visible watermark, full resolution, ready to share or use in any project.

BanaGen — Built for
Creators Who Care About Quality

数字が物語ります

1,400+Creators Registered
3,400+Images Generated
4K最大解像度

Powered by Nano Banana

What Images Can
Nano Banana Create?

From anime to photorealism, technical diagrams to creative portraits — Nano Banana handles every style with precision.

Anime warrior girl with silver hair under cherry blossoms at sunset — Nano Banana AI anime art
Anime & Manga

Anime & Manga Style

Vivid anime characters, dynamic poses, and manga-quality linework with perfect expressive detail.

Photorealistic portrait of a smiling woman with curly hair outdoors — Nano Banana AI by BanaGen
Photorealistic

Photorealistic Portraits

Cinema-grade realism with true-to-life skin, light, and depth — indistinguishable from real photos.

Dark fantasy dragon spreading wings under a stormy lightning sky — concept art by Nano Banana AI
Concept Art

Fantasy & Concept Art

Epic scenes, creatures, and world-building artwork with cinematic drama and painterly mastery.

Neon CREATE ANYTHING text art on dark background — perfect AI text rendering by BanaGen
Text in Image ⭐

完璧なテキストレンダリング

Crisp, legible text inside images — posters, banners, menus, and more. 100+ languages, zero spelling errors.

Technology workflow optimization flowchart with 8-step process — AI diagram by BanaGen
Infographics

Diagrams & Infographics

Clear, structured visuals for presentations, reports, and educational content with readable labels.

Anime girl with orange hair shown across 6 different scenes — character consistency by Nano Banana AI
キャラクターの一貫性

Consistent Characters

Keep your character's face, style, and identity identical across unlimited scenes and settings.

サポート

よくある質問

BanaGenのクレジット、請求、ライセンスについて知っておくべきすべて。

Yes. BanaGen is a free platform powered by Google's Nano Banana AI. Sign in with your Google account and get 24 free credits instantly — no credit card needed.

BanaGen supports all three generations of Google's Nano Banana AI: the original Nano Banana (Gemini 2.5 Flash), Nano Banana Pro (Gemini 3 Pro), and the latest Nano Banana 2 (Gemini 3.1 Flash). Each model offers different speed and quality tradeoffs — BanaGen lets you choose which one to use.

Yes, that's the primary workflow. Type a description of what you want, choose your preferred Nano Banana model (original, Pro, or Nano Banana 2), set style and resolution, and BanaGen generates a high-quality image in seconds. Nano Banana 2 is particularly strong at following detailed prompts and rendering accurate text within images.

Yes. BanaGen supports image-to-image editing — upload any photo and describe the changes you want. You can adjust lighting, change backgrounds, swap styles, add or remove elements, and more, all through natural language instructions.

BanaGen supports a wide range of styles including anime and manga, photorealistic portraits, fantasy and concept art, Pixar-style 3D renders, oil paintings, infographics, and more. You can specify styles directly in your prompt, or use one of the specialized tools in the app.

BanaGen generates images natively at up to 2K resolution and supports 4K upscaling for sharper, print-ready output. Resolution options and aspect ratio can be set before generating.

Each image generation costs 12 credits. New accounts receive 24 free credits on first sign-in — enough for two full generations. Subscription credits reset monthly; one-time credit packs never expire. You can see your balance at any time in the dashboard.

There's no hard daily limit — it depends on how many credits you have. Free credits (24 on signup) can be used at any time. Once they're gone, you can purchase a credit pack or subscribe to a Pro plan for ongoing access.

Yes. BanaGen is fully responsive and works in any modern mobile browser — Safari, Chrome, Firefox. No app download is required. Text-to-image and image-to-image both work on mobile without any loss of functionality.

On any paid plan, you own full commercial rights to every image you generate — including use in advertising, merchandise, and client deliverables. Images created using free credits are covered by a non-commercial license (CC BY-NC 4.0).

You do. BanaGen does not claim ownership of generated images. On paid plans, images are yours to use commercially. On the free tier, usage is personal and non-commercial. We recommend keeping a local copy of any image you intend to use.

Uploaded reference images are temporarily stored to process your generation request. They are not used to train AI models and are automatically deleted after a short retention period. We do not share your uploads with third parties.

By default, generated images may appear in the public gallery to inspire other creators. Pro plan users can enable Stealth Mode to keep their images entirely private — hidden from the feed and visible only to them.

We offer a 7-day refund on new subscriptions if you've used fewer than 50 credits. Email support@banagen.com with your order ID and we'll process it promptly. Note that payment processor fees are non-refundable in some regions.

まだ質問がありますか?お問い合わせ support@banagen.com

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素晴らしい画像を作成する準備はできましたか
BanaGenで?

Start with 24 free credits — no credit card required. Generate anime art, realistic portraits, and more. Upgrade anytime for unlimited 4K generations.