Online Tools HarborAI Tools
Free AI writing and productivity tools: paraphrase, summarize, fix grammar, write emails and more. 36 free tools, no sign-up.
AI Paraphrasing ToolNewRewrite sentences and paragraphs in fresh words while keeping the meaning. Choose a style: standard, formal, simple, creative or shorter.AI Text SummarizerNewSummarize long articles, reports and emails into a short paragraph or key bullet points.AI Grammar CheckerNewFix grammar, spelling and punctuation mistakes in English, French, German, Spanish and more.AI TranslatorNewTranslate text naturally between 40+ languages, keeping tone and formatting.Image to Prompt GeneratorNewUpload any image and get a detailed AI prompt to recreate it with Midjourney, Stable Diffusion, DALL·E or Flux.AI Alt Text GeneratorNewGenerate SEO-friendly, accessible alt text for your images in one click.Image to Text (AI OCR)NewExtract text from images, screenshots and photos of documents with AI.AI Email WriterNewDescribe what you need and get a ready-to-send email with a subject line, in the tone you choose.AI Email Reply GeneratorNewPaste an email or message you received and get a polite, clear reply.AI Title & Headline GeneratorNewGenerate catchy titles for blog posts, YouTube videos, articles and emails from a topic or draft.AI Meta Description GeneratorNewWrite SEO meta descriptions (under 155 characters) that earn clicks, from a page title, keyword or content.AI Product Description GeneratorNewTurn product features into a persuasive, SEO-friendly product description for your online store.AI Slogan GeneratorNewGenerate memorable slogans and taglines for your brand, product or campaign.AI Business Name GeneratorNewGet brandable business, startup and shop name ideas from a description of your idea.AI Hashtag GeneratorNewGenerate relevant hashtags for Instagram, TikTok, LinkedIn and X from your post or topic.AI Caption GeneratorNewWrite engaging captions for Instagram, TikTok, LinkedIn and Facebook posts.AI Topic GeneratorNewGenerate fresh topic ideas for blogs, essays, videos, podcasts or debates on any subject or niche.AI FAQ GeneratorNewGenerate frequently asked questions and answers for a product, service or page, ready for FAQ schema.AI Keyword Idea GeneratorNewBrainstorm long-tail keyword ideas and search intents for SEO content around a seed keyword.AI Essay Outline GeneratorNewCreate a structured outline with thesis, sections and key points for an essay or article.AI Cover Letter GeneratorNewWrite a tailored cover letter from the job description and your experience.AI Prompt ImproverNewTurn a vague idea into a clear, detailed prompt for ChatGPT, Claude, Gemini or image generators.AI Regex GeneratorNewDescribe what you want to match in plain English and get a regular expression with an explanation.AI SQL Query GeneratorNewTurn a plain-language question into an SQL query for MySQL, PostgreSQL, SQLite or SQL Server.AI Code ExplainerNewPaste code in any language and get a clear, step-by-step explanation of what it does.AI Instagram Caption GeneratorNewWrite scroll-stopping Instagram captions for posts and Reels, with a hook, emojis and a call to action.AI TikTok Caption GeneratorNewWrite short, catchy TikTok captions with a strong hook and a call to action.AI Facebook Post Caption GeneratorNewWrite engaging Facebook post captions that get comments and shares.AI X (Twitter) Post GeneratorNewWrite short, punchy posts for X (Twitter) from your idea or link.AI Instagram Hashtag GeneratorNewGenerate relevant Instagram hashtags for posts and Reels, mixing popular and niche tags.AI TikTok Hashtag GeneratorNewFind relevant TikTok hashtags for your video to reach the right For You audience.AI YouTube Hashtag GeneratorNewGenerate YouTube hashtags and tags for your videos and Shorts.Midjourney Prompt from ImageNewTurn an image into a ready-to-use Midjourney prompt with style, lighting and aspect ratio.Stable Diffusion Prompt from ImageNewGenerate Stable Diffusion tags and a negative prompt from any image.AI Image Description GeneratorNewGet a detailed AI description of any photo or picture.AI Image Caption GeneratorNewUpload a photo and get engaging captions with hashtags for Instagram, LinkedIn or TikTok.
Other categories
Text ToolsClean up text: remove whitespace and line breaks, find and replace, convert HTML to text and more.ExtractorsPull emails, URLs, numbers, sitemap links or any regex match out of a block of text.Line ToolsSort, dedupe, number, shuffle, filter and join lines of text.Case ConvertersConvert text to UPPERCASE, lowercase, Title Case, camelCase, snake_case and more.Developer ToolsFormat JSON, XML and CSS, view HTML, compare text, decode JWTs and convert timestamps.Encoders & DecodersBase64, URL, HTML entities, binary, hex, Morse code and hash generators.GeneratorsGenerate passwords, UUIDs, random numbers, Lorem Ipsum, QR codes and random topics.SEO & Web ToolsSitemap URL extractor, meta tag generator, slug generator, UTM builder and keyword density checker.PDF ToolsMerge, split, rotate and convert PDF files privately in your browser. Files never leave your device.ConvertersUnit converters (cm to inches, kg to lbs, °C to °F…), number bases, Roman numerals and numbers to words.Passwords & SecurityGenerate strong passwords and passphrases, check password strength and hash with bcrypt, all locally.Business & LegalCreate invoices, quotes and receipts as PDF, and generate a privacy policy, shipping policy, return & refund policy, terms and conditions, cookie policy and disclaimer for your website or online store.Business CalculatorsFree business, marketing and e-commerce calculators: break-even, ROAS, CPA, CPC, CPM, ROI, profit margin, markup, conversion rate, LTV, CAC, VAT and more.Image ToolsConvert, compress and resize images in your browser. Nothing is uploaded.Video ToolsCompress, trim, convert and mute videos, make GIFs, extract MP3 audio, detect scenes and download YouTube thumbnails, privately in your browser.