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AI Services for Writer

AI Services for Writer

Support for article structure, proofreading, and summarization dramatically cuts writing time.Browse 76 AI services to find the tool that best fits your work challenges.

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Japanese support only

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グランタブル

Grantable

An AI-powered platform for nonprofits and grant professionals to write and manage grant applications. Upload past proposals and supporting materials, and the AI learns your organization's voice and information to draft new proposals. Includes GrantGraph for funder matching, RFP analysis, and collaborative team editing — end-to-end support for the entire grant application process.

# テキスト生成# PDF・文書生成# コピーライティング

スードウライト

Sudowrite

An AI writing tool built specifically for fiction and creative storytelling. Features include Story Bible for developing ideas into chapter outlines, Write for suggesting continuations, Describe for vivid scene-setting, Brainstorm for idea expansion, and Expand for fleshing out prose. Designed as a creative co-author for writers. Interface and optimization are primarily English-focused; Japanese creative writing is not practically supported.

# テキスト生成# コピーライティング# アイデア支援／創造ツール# 品質向上・クリエイティブ支援

ワードチューン

Wordtune

An AI writing assistant focused on rephrasing and paraphrasing English text. Features include tone-aware rewriting, long-form summarization, AI-generated text, grammar checking, and a Humanize function to make AI-sounding writing feel more natural. Available as a browser extension and editor integration. Primarily English-focused; Japanese writing correction and rewriting are not practically supported.

# コピーライティング# テキスト生成# 要約・翻訳# 品質向上・クリエイティブ支援

グラマリー

Grammarly

An AI writing assistant that detects and corrects English grammar, spelling, and punctuation errors in real time. Also handles tone adjustment, text rewriting, AI-powered content generation, and plagiarism and AI text detection. Available as a browser extension, desktop and mobile apps, and integrates with Microsoft Office and Google Docs. Focused on English; Japanese text proofreading is not practically supported.

# コピーライティング# テキスト生成# 業務効率化# 品質向上・クリエイティブ支援

イージーピージーエーアイ

Easy-Peasy.AI

An all-in-one AI platform covering content creation, image generation, voice synthesis, and transcription. With over 90 templates, it accelerates the production of blog posts, marketing materials, and social media content.

# テキスト生成# 画像生成# 音声生成# 要約・翻訳# 日本語対応

エーアイブログクン

AIブログくん

A Japanese-made AI writing tool specialized for bulk SEO article generation and automated publishing. Enter keywords or a topic summary and generate large volumes of SEO-ready blog articles in minutes. Supports automatic posting to WordPress and internal link optimization. Used by marketers and affiliate publishers looking to scale content SEO.

# テキスト生成# SEO# 日本語対応

カリス

Xaris

A Japanese platform using generative AI to support consulting and automate workflows for insurance agencies. AI leverages customer conversation history and insurance product data to recommend optimal insurance plans and generate policy comparisons and explanations. A domestic service aimed at improving insurance sales efficiency and customer experience.

# テキスト生成# 要約・翻訳# 日本語対応

トランスコープ

Transcope

A Japanese-focused AI writing tool for rapidly generating SEO-strong blog posts and web copy. Enter a keyword and it analyzes competitors to generate an article structure and full draft, with WordPress integration for automatic publishing. Designed for businesses and media teams pursuing content SEO.

# SEO# テキスト生成# 日本語対応

チャットドック

ChatDOC

A tool that lets you upload a PDF and then search and summarize its contents through an AI conversation. Makes it easy to digest complex reports and academic papers efficiently.

# 要約・翻訳# PDF・文書生成

インク

INK

An AI-powered content optimization and SEO writing assistance tool. Displays an SEO score in real time as you write, providing feedback on the keywords, heading structure, and content quality needed to rank in search. Integrates AI writing assistance with SEO guidance to help content marketers produce higher-quality articles.

# テキスト生成# SEO# コピーライティング

オートブログギングエーアイ

Autoblogging.ai

An AI blog automation tool that auto-generates and publishes blog articles from RSS feeds or keywords. Uses LLMs like GPT-4 and Claude to generate SEO-optimized articles, with support for automatic WordPress posting, scheduling, and multilingual content generation. Used for building affiliate and content SEO sites at scale.

# テキスト生成# SEO# 自動化・省力化

ショドー

Shodo

A cloud-based AI proofreading and writing assistance platform specialized for Japanese. It provides real-time suggestions on sentence flow, grammatical errors, and expression improvements, helping raise the quality of business documents and content.

# テキスト生成# 要約・翻訳# 日本語対応

ムーンビーム

Moonbeam

An AI writing assistant specialized in long-form content creation. It produces high-quality essays, articles, and stories, with structural guidance and style customization features.

# テキスト生成

フレイズ

Frase

An AI writing and SEO tool for creating SEO-optimized blog posts and content briefs. AI analyzes top-ranking articles for structure, headings, and keywords, then auto-generates content briefs and assists with writing the full article. Used by content marketers and SEO professionals who want a unified tool for SEO research and AI writing.

# テキスト生成# SEO

ライター

Rytr

A multilingual AI writing assistant that rapidly generates blog posts, ad copy, social media content, and more—known for its easy-to-use interface.

# テキスト生成# コピーライティング

フェロ

FeloWeb

A next-generation AI search engine that searches and summarizes optimal answers from the web, PDFs, and academic papers. Advanced natural language processing delivers faster and more accurate information retrieval than traditional search.

# 要約・翻訳# 検索・レコメンド# 日本語対応

ビデオトゥーブログ

Video To Blog

A tool that analyzes videos (YouTube URLs or uploaded video files) and automatically converts them into SEO-optimized blog posts. Automates the full pipeline from transcription to editing, keyword insertion, and article formatting — dramatically reducing the effort for YouTubers and content marketers repurposing video content as written articles.

# テキスト生成# 要約・翻訳

ノートブックエルエム

NotebookLM

A next-generation note-taking app from Google that lets you feed your own notes and documents to an AI assistant for summarization, Q&A, and information organization.

# 要約・翻訳# 検索・レコメンド# 音声生成# 日本語対応

ジェンスパークエーアイ

Genspark AI

A next-generation search platform that restructures search results in an agentic format, enabling conversational knowledge exploration. Supports deep-dive learning and creative information gathering.

# 検索・レコメンド# AIエージェント# 日本語対応

マナス

Manus

A fully autonomous AI agent that handles end-to-end tasks spanning research, report writing, data organization, and website generation. Simply provide a goal and the AI independently plans, executes, and validates its way to completion. Its multi-agent architecture pairs a Planner, an Executor, and a Validator working in concert.

# AIエージェント# 生成AI（LLM）# 自動化・省力化# 業務効率化

グロック

Grok

A conversational AI assistant developed by Elon Musk's xAI. Its key strengths are access to real-time information from X (Twitter) and a response style that blends accurate, up-to-date answers with humor. Originally exclusive to X premium subscribers, it is now also accessible standalone at grok.com. The latest model is Grok 3.

# 生成AI（LLM）# AIチャットボット# テキスト生成# 画像生成# AIエージェント# 日本語対応

ディープエル

DeepL

A high-accuracy machine translation service. Its neural translation engine delivers natural-sounding translations, making it one of the world's leading translation tools alongside Google Translate. Available as a web app, desktop app, and API, with document translation and a business tier, DeepL Pro. Supports 30+ languages including Japanese.

# 要約・翻訳# テキスト生成# 業務効率化# 生産性向上# 日本語対応

パープレキシティ

Perplexity

An answer-first AI search engine that cites source URLs alongside every response. Supports multiple LLMs including GPT, Claude, Gemini, and Sonar, with file upload and image generation available on Pro plans. Offers Perplexity Pages for generating summary articles and an AI assistant experience — a rapidly growing service redefining how people search.

# 検索・レコメンド# 検索エンジン・RAG# AIエージェント# 要約・翻訳# 生成AI（LLM）# 日本語対応

ジェミニ

Gemini

A multimodal AI developed by Google, capable of processing a wide range of information including search queries, images, and documents.

# 生成AI（LLM）# AIチャットボット# 要約・翻訳# テキスト生成# AIエージェント# 日本語対応

チャットジーピーティー

ChatGPT

A conversational AI developed by OpenAI. Using the latest models like GPT-4o and o3, it supports text, image, and voice conversations, file analysis, web search, and code generation and execution. 'Projects' enable custom instructions, while the Canvas feature enables collaborative editing of text and code. Widely integrated into external applications via API.

# 生成AI（LLM）# AIチャットボット# 要約・翻訳# テキスト生成# AIエージェント# 日本語対応

クロード

Claude

A conversational AI assistant developed by Anthropic. Handles a wide range of tasks including comprehending and generating long-form content, writing and reviewing code, and analyzing documents. Designed with safety (Constitutional AI) and honest responses as core principles. The latest Claude 4 model achieves top-tier benchmark performance in coding, mathematics, and reasoning. Available at claude.ai, via API, and through the Claude app.

# 生成AI（LLM）# AIチャットボット# 要約・翻訳# テキスト生成# AIエージェント# 日本語対応

ウィスク

Whisk

An experimental image generation and transformation tool from Google. Upload multiple images and it extracts the subject, scene, and style from each to combine them into a new image. Text-based adjustments are also supported, enabling intuitive, reference-image-based image creation.

# AIエージェント# ノーコード自動化# 通知・タスク連携# 業務効率化# 日本語対応

ディファイ

Dify

An open-source AI development platform for building, deploying, and operating LLM applications. Includes a no-code visual workflow builder, RAG pipeline construction, AI agent orchestration, and prompt versioning. Usable by both developers and non-engineers. Available as self-hosted or cloud, with API integration support.

# AIチャットボット# AIエージェント# ノーコード自動化# API・SDK# 業務効率化# 日本語対応

キャンバ

Canva

A design creation tool that lets anyone easily create graphics and presentations using templates.

# デザイン生成# 画像生成# プレゼン・スライド生成# テキスト生成# 日本語対応

ライトソニック

Writesonic

An AI writing tool specialized in generating marketing content.

# コピーライティング# SEO# テキスト生成# AIチャットボット# AIエージェント

オーディオリード

Audioread

A podcast-style listening app that reads web pages, articles, PDFs, and emails aloud using AI voice. Upload content or paste a URL and it plays back in natural-sounding audio that can also be delivered as a podcast — enabling passive information consumption during commutes and multitasking.

# 音声生成# 要約・翻訳

ツムギ

tsumugi

From research to publishing, generates SEO-optimized articles in under ten minutes simply by providing a theme or concept.

# テキスト生成# SEO# 自動化・省力化# マーケティング# 日本語対応

フォトグラファーエーアイ

Fotographer.ai

A platform specialized in AI-generated product photography, background replacement, and automated ad image production. Composite products onto professional-quality backgrounds without a studio shoot, or auto-generate creatives for e-commerce. API support enables high-volume image processing across fashion, food, furniture, and other categories.

# 画像生成# デザイン生成# 品質向上・クリエイティブ支援# マーケティング# 小売・EC

ピックコパイロット

Pic Copilot

An AI image editing tool developed by Alibaba, specialized for e-commerce. It performs background removal, AI background generation, virtual try-on, and image translation in one click — with reported average CTR improvements of 54.7%. Available on a free plan, it reduces the cost and effort of ad creative production.

# 画像生成# デザイン生成# 品質向上・クリエイティブ支援# マーケティング# 小売・EC

ナノバナナ

Nano Banana

A platform powered by Gemini—Google's next-generation generative AI—that can automatically generate and edit high-quality images from text prompts. Nano Banana and Nano Banana Pro modes create images in a wide range of styles within seconds, with fine-grained control over edits. Handles everything from realistic photography to creative artistic expression via simple text instructions, streamlining visual content production.

# 画像生成# 自動化・省力化# 品質向上・クリエイティブ支援# 日本語対応

アンチグラビティ

Antigravity

A next-generation AI-powered development platform (AI-native IDE) released by Google in 2025. Rather than traditional code-completion tools, it takes an 'agent-first' approach where AI autonomously plans, executes, and validates — including control of the development environment and browser. Available as a free public preview, it supports integration with multiple AI models including Gemini 3.

# コード生成# 画像生成# デザイン生成# AIエージェント# 生産性向上# 品質向上・クリエイティブ支援

クウェン

Qwen

The large language model "Qwen" (Tongyi Qianwen) developed by Alibaba, along with its conversational AI interface Qwen Chat. Supports multimodal input—text, images, and video—and offers free access to chat, image generation, video generation, web search, document processing, and code generation. Many models are released as open source, with full support for Japanese input and output.

# 生成AI（LLM）# AIチャットボット# テキスト生成# 画像生成# コード生成# 日本語対応

ミストラル

Mistral

A family of open-source and proprietary large language models (LLMs) developed by French AI startup Mistral AI, along with an API platform for accessing them. Ranges from the fast and lightweight Mistral 7B and Mixtral (MoE architecture) to Codestral for coding and Mistral Reasoning for advanced reasoning tasks. Supports both self-hosting and commercial API access.

# 生成AI（LLM）# AIチャットボット# テキスト生成# 要約・翻訳# AIエージェント# 日本語対応

コピードットエーアイ

Copy.ai

A writing AI that handles diverse text generation tasks, including social media posts, ad copy, and product descriptions.

# コピーライティング# SEO# テキスト生成# AIエージェント

ミッドジャーニー

Midjourney

An AI service that generates high-quality images from text prompts. Widely praised for artistic expressiveness and style consistency, it is heavily used for illustrations, concept art, and photorealistic imagery. Historically accessed via a Discord bot, a web app launched in 2024. Commercial use requires a paid plan.

# 画像生成# デザイン生成

テイラーブランズエーアイ

Tailor Brands AI

An AI branding and business formation platform that covers everything from logo generation to LLC registration, website publishing, business cards, social media kits, and business email — all in one place. Enter your business concept to generate multiple logo options, including vector files at no extra cost. Particularly strong for launching businesses in the US market.

# デザイン生成# 業務効率化

ビジュアルエレクトリック

Visual Electric

An AI image generation tool designed for designers. It produces high-quality photorealistic images from prompts to support professional creative visual work.

# 画像生成# アイデア支援／創造ツール

キャッチー

Catchy

A Japanese-made AI writing tool with 100+ templates for quickly generating Japanese content including ad copy, blog posts, social media updates, and product descriptions. Built on a ChatGPT-based engine optimized for Japanese, covering diverse use cases from SEO writing and email drafts to press releases. Available on monthly and pay-as-you-go plans.

# コピーライティング# テキスト生成# マーケティング# 日本語対応

ヘドラ

Hedra

An AI video platform that generates realistic talking character videos by combining audio with portrait images. Its core feature converts text to speech and lip-syncs the person in the image, and is used for AI podcast production, virtual avatars, and social content creation.

# 画像生成# 動画生成# 音声生成# バーチャルヒューマン

レオナルドエーアイ

Leonardo.Ai

A multimodal AI platform for generating high-fidelity images, artwork, and video assets. Features intuitive prompt-based controls and produces commercially usable content.

# 画像生成# デザイン生成

ストックイメージエーアイ

STOCKIMG.AI

An AI design platform that generates logos, stock photos, illustrations, wallpapers, posters, and more in bulk. Includes social media integration and auto-scheduling, making it well-suited for business use.

# 画像生成# デザイン生成

モニカ

Monica

An AI copilot browser extension that surfaces multiple AI models — ChatGPT, Claude, Gemini, Perplexity, and others — in a side panel. Features web page summarization, translation, rewriting, in-page chat, and saved prompt management to assist with everyday browsing tasks.

# AIエージェント# 検索・レコメンド# 日本語対応

サーファー

Surfer

An end-to-end SEO tool for content optimization, writing, auditing, and topic cluster visualization. Compare your article against top-ranking competitor content in real time with keyword, structure, and NLP scoring. Built around Content Editor, Topical Map, and SERP Analyzer — widely used by SEO professionals.

# SEO# マーケティング# コピーライティング

クイックデザイン

QuickDesign

An AI design tool that instantly generates UI designs (wireframes and mockups) from text instructions. Supports export to Figma, enabling product managers and non-designers to quickly create and share UI concepts. Specialized for rapid prototyping.

# 画像生成# デザイン生成# 品質向上・クリエイティブ支援# マーケティング# 小売・EC

ジャスパー

Jasper

An enterprise AI writing platform for generating diverse content including marketing copy, ads, blog posts, and social media. Train it on your brand voice and product information to produce consistent copy at scale. Includes SEO optimization, collaborative team editing, and 100+ content templates.

# コピーライティング# SEO# テキスト生成# AIエージェント

ノーション

Notion

AI features built into Notion for document summarization, writing assistance, and automated meeting-note generation.

# テキスト生成# 要約・翻訳# ノーコード自動化# 通知・タスク連携# 業務効率化# 日本語対応

ミリキャンバス

MiriCanvas

An AI-powered design tool that assists in creating presentation decks and social media posts.

# デザイン生成# 画像生成# プレゼン・スライド生成# テキスト生成# 日本語対応

グーグルエーアイスタジオ

Google AI Studio

A free, developer-facing web tool for building and testing prototypes with Google's Gemini models. Provides an intuitive environment for prompt design, testing, and iteration, with seamless integration into production apps via the Gemini API. Supports multimodal input including text, images, audio, and video.

# 生成AI（LLM）# AIモデル構築・管理# API・SDK# AIエージェント

アラゴン・エーアイ

Aragon.ai

An AI tool that generates professional-quality headshots from selfie photos. Automatically adjusts lighting and background to produce profile pictures ideal for LinkedIn and similar platforms.

# 画像生成# デザイン生成# バーチャルヒューマン# エンタメ／ゲーム・遊び# 日本語対応

プレイグラウンドエーアイ

Playground AI

A free image generation AI that creates high-quality artwork from text prompts. Suitable for personal and commercial use, with extensive customization options.

# 画像生成# アイデア支援／創造ツール

アドクリエイティブドットエーアイ

Adcreative.ai

A platform that automatically generates high-converting ad creatives — banners, copy, and video — along with competitor analysis and compliance checking tools to support comprehensive ad campaign management.

# デザイン生成# マーケティング

プロンプトラボ

Prompt Lab

A Japan-developed platform for easily designing and validating prompts for generative AI. Features prompt effectiveness comparison, version management, and template sharing to streamline prompt development for individuals and businesses.

# テキスト生成# コード生成# 日本語対応

アートフローエーアイ

artflow AI

An AI content creation platform for generating and developing custom AI characters with consistent visuals across videos and illustrations at scale. Excels at maintaining character consistency in pose, expression, and background — used for producing character-driven YouTube videos, webtoons, and social content.

# 画像生成# バーチャルヒューマン

フレアエーアイ

FlairAI

A visual design tool that generates professional-quality product photos via drag-and-drop AI workflows. Provides a fast, intuitive studio alternative for e-commerce and advertising.

# デザイン生成# 画像生成

ジェンクラフト

Gencraft

An AI creative tool that generates high-definition art and photography from text prompts, supporting a wide variety of styles including fantasy, photorealism, and anime.

# 画像生成

マジックイレイサー

Magic Eraser

A free AI editing tool that removes unwanted objects or people from images in seconds. Select with a brush, erase in one click — commercial use supported.

# 画像生成# 日本語対応

コミックコパイロット

Comic-Copilot

A Japan-born AI tool for manga creation. It automatically assists with character design, story structure, and panel layouts (name), streamlining the creative process for manga artists.

# テキスト生成# 画像生成# 日本語対応

ステーブルディフュージョン

Stable Diffusion

An open-source AI image generation model that produces high-quality images from text prompts. Developed by Stability AI, it can be run locally and supports advanced customization through tools like ComfyUI and Automatic1111. Model weights are publicly available, enabling free fine-tuning and custom model creation.

# 画像生成# 生成AI（LLM）# アイデア支援／創造ツール# 日本語対応

イメージエフエックス

ImageFX

An AI image generation tool developed by Google. Generates high-fidelity images in a variety of styles from text prompts, supporting creative expression through an intuitive interface.

# 画像生成# 日本語対応

ナイトカフェ

NightCafe

An AI art creator platform that lets you switch between multiple image generation models including Stable Diffusion, DALL-E, Flux, and SDXL. Features community artwork sharing, likes, and contests — an AI image generation experience with a social media feel. Beginner-friendly credit-based pricing makes it easy to try.

# 画像生成# アイデア支援／創造ツール

プロンプティチュードドットアイオー

Promptitude.io

A platform for easily embedding AI capabilities (GPT) into your own apps and business workflows. Includes advanced developer-facing management features such as API integration, prompt management, and permission controls.

# テキスト生成# コード生成# ノーコード自動化

クラウドワークスエーアイ

クラウドワークス AI

A suite of AI features provided by CrowdWorks. On the freelance matching platform, AI recommends relevant projects based on skills and assists both workers and clients in drafting job descriptions and proposals — improving efficiency on both sides of the marketplace.

# テキスト生成# 画像生成# 業務効率化# 自動化・省力化# 日本語対応

ポー

Poe

An AI aggregator service by Quora that lets you use and compare multiple AI models — ChatGPT, Claude, Gemini, Llama, and others — in a single app. Users can create and publish custom bots, and switch between models to find the best answer. Available on both web and mobile.

# AIエージェント# 検索・レコメンド# 日本語対応

アドビファイアフライ

Adobe Firefly

Adobe's generative AI toolset that creates images, vectors, and design elements from text prompts alone. Integrates with Photoshop, Illustrator, and other Adobe apps, with support for commercial use.

# 画像生成# デザイン生成# 生成AI（LLM）# 日本語対応

ノーラング

NoLang

A Japan-based AI video production tool that makes it easy to generate and edit videos from text or images, specialized for creating short-form and social media content.

# テキスト生成# 動画生成# 日本語対応

ピックワンダフルエーアイ

PicWonderful AI

An AI tool for one-click image editing tasks including photo enhancement, background removal, and resizing. Ideal for social media creatives and e-commerce product imagery.

# 画像生成# デザイン生成

アナキンエーアイ

Anakin AI

An all-in-one AI platform for switching between and using multiple AI models including ChatGPT, Claude, Gemini, and Stable Diffusion. Text generation, image generation, voice generation, and AI automation workflows are all accessible in a single interface, with 100+ templates and a no-code AI app builder.

# テキスト生成# 画像生成# 音声生成# 動画生成# AIエージェント# 日本語対応

ロバート

Lovart

An AI design agent for creators that generates illustrations, manga, concept art, and stickers from text or reference images while maintaining consistent character design and visual style. Goes beyond simple image generation with 'character consistency' across a series and a wide selection of art styles.

# デザイン生成# 画像生成# 動画生成# 音声生成# 音楽生成# アイデア支援／創造ツール# 品質向上・クリエイティブ支援# AIエージェント

イージーエディット

EasyEdit

A tool that uses AI to streamline video editing. Edit cuts, insert captions, and add background music using a transcript-based interface — producing social media-ready videos quickly without specialized skills. Particularly focused on vertical short-form content editing.

# 画像生成

セイゲツ

SEIGETSU

A brainstorming-focused AI tool that takes a word or theme as input, expands ideas through multiple AI models, and organizes and visualizes the results as mind maps or slide decks. Rapidly broadens your thinking and structures it into actionable ideas to powerfully support planning and thought processes.

# 画像生成# 業務効率化# 生産性向上# プレゼン・スライド生成# スライド作成

アニロール

Anirole

An entertainment app for role-playing and chatting with AI characters. Features emotionally rich conversations with anime, game, and original characters, plus the ability for users to create and publish their own characters. Offers voice actor audio and multilingual support for immersive AI companion and world-building experiences.

# AIチャットボット# ボイスボット# 品質向上・クリエイティブ支援# アイデア支援／創造ツール# エンタメ／ゲーム・遊び# 日本語対応