Guides & collections
AI Prompt & Content Tools
Build AI prompts, compare LLMs, calculate token costs, and generate personas
7 toolsContent Analysis & Optimization
Analyze readability, keyword density, reading time, and writing style
5 toolsSocial Media & Text Formatting
Format LinkedIn posts, split threads, generate hashtags, and resize social images
10 toolsAll tools
Aesthetic Text Generator
Convert plain text into beautiful aesthetic Unicode styles for social media, bios, and more
AI Image Prompt Generator
Build detailed, optimized prompts for Midjourney, DALL-E, Stable Diffusion, and other AI image generators
AI Persona Generator
Create detailed AI character personas with personality traits, speaking style, and communication rules — download as markdown
AI Prompt Builder
Create structured, effective prompts for ChatGPT, Claude, Midjourney and other AI tools — no signup needed
AI Prompt Word & Token Counter
Count words, characters, and estimate tokens & cost for ChatGPT, Claude, Gemini, and other AI models
APA Citation Formatter
Generate APA 7th edition citations for journal articles, books, websites, and more
ASCII Art Generator
Convert text to big ASCII art letters — perfect for READMEs, terminals, and banners
Audiobook Production Cost Calculator
Estimate audiobook narration costs, break-even sales, and ACX royalty share vs paid narration
Author Income Estimator
Estimate monthly and annual author income across ebook, paperback, and audiobook formats
Blog Post Length Calculator
Find the ideal word count for your blog post based on topic, competition, and goal
Book Description Word Counter
Count characters and keywords in your KDP book description with real-time 4000-character limit tracking
Book Launch Budget Calculator
Plan your self-publishing launch costs and calculate copies needed to break even
Book Marketing Budget Allocator
Allocate your monthly book marketing budget across Amazon AMS, BookBub, newsletters, and social ads
Book Print Cost Calculator
Estimate print-on-demand costs for KDP and IngramSpark by page count and interior type
Book Word Count Estimator
Find the industry-standard word count for your genre and calculate page count
Character Name Generator
Generate character names by genre, origin, and style with pronunciation guides
Citation Style Comparison
Quick reference for APA 7th, MLA 9th, Chicago 17th, and IEEE citation formats
Content Brief Template Generator
Generate a structured SEO content brief from your target keyword in seconds
Copyright Duration Calculator
Calculate when a work enters the public domain based on US copyright law
Dialogue Generator
Generate screenplay-style conversations between configurable characters with tone, scenario, and length settings
Ebook Pricing Optimizer
Find the optimal Amazon KDP price to maximize ebook royalties across the 35% and 70% tiers
Email Newsletter Benchmark Guide
Compare your email open rates, click-through rates, and unsubscribe rates to industry averages
Email Subject Analyzer
Score your email subject line for spam risk, length, urgency, and predicted open rate
Email Subject Line Tester
Score your subject line, detect spam words, preview on mobile and desktop, and get actionable tips
Freelance Writing Rate Calculator
Calculate fair per-word, per-article, and retainer rates based on your experience and niche
Ghost Writing Pricing Guide
Ghostwriter rate ranges by project type, complexity, and rights arrangement
Grammar Analyzer
Score your writing across 6 grammar dimensions: passive voice, conciseness, word choice, originality, sentence variety, and adverb discipline
Haiku Generator
Generate traditional 5-7-5 haiku from theme and season inputs — with syllable counts, batch mode, and image export
Hashtag Generator
Generate relevant hashtags for Instagram, Twitter, TikTok, and LinkedIn from any topic or keyword
Headline Analyzer
Score your headline on power words, clarity, length, and SEO effectiveness
Headline Score Analyzer
Compare 2-5 headlines side-by-side and score them on power words, clarity, length, and emotional resonance
IngramSpark vs KDP Comparison
Compare royalties, print costs, and distribution between IngramSpark and Amazon KDP
Instagram Caption Counter
Count characters, hashtags, mentions, and emojis in real time. Stay within Instagram's limits and craft the perfect caption.
KDP Royalty Calculator
Calculate your Amazon Kindle Direct Publishing royalties for ebooks and paperbacks
Keyword Density Checker
Analyze keyword frequency, phrase density, and readability in your content — with Flesch-Kincaid score
Limerick Generator
Create AABBA-scheme limericks with enforced syllable patterns and rhyme word banks — funny poems in seconds
LinkedIn Post Formatter
Format LinkedIn posts with bold, italic, bullets and live preview before you publish
LLM Model Comparison Chart
Compare GPT-4o, Claude, Gemini, Llama, Mistral, and DeepSeek models side by side — filter by use case, price, and features
LLM Token Cost Comparison
Paste text to estimate token count and compare costs across GPT-4o, Claude, Gemini, and Llama models
Lorem Ipsum Generator
Generate placeholder text in Classic Latin, Hipster, Business, or Tech styles with word and character counts
Markdown Table Generator
Build, edit, and export markdown tables visually with live preview
MLA Citation Formatter
Generate MLA 9th edition Works Cited entries and in-text citations
Nonfiction Book Proposal Guide
A complete guide to nonfiction book proposal structure with typical section lengths
Novel Word Count by Genre
Find the expected word count range for your genre — from literary fiction to picture books
Passive Voice Percentage Checker
Analyze your text to find what percentage of sentences use passive voice
Plot Generator
Generate story outlines in Three-Act, Hero's Journey, Five-Act, and Freytag's Pyramid formats across 10 genres
Podcast Script Timer
Calculate how long your script takes to read aloud — for podcasts, presentations, and speeches
Poetry Generator
Generate sonnets, free verse, acrostics, limericks, and villanelles from your chosen theme and mood
Poetry Syllable Counter
Count syllables per line and identify haiku, sonnet, and limerick patterns
Proofreading Checklist
Systematically check your writing for grammar, punctuation, style, and formatting errors
Query Letter Word Count Guide
Structure your query letter to stay within the 250–350 word target literary agents expect
Random Word Generator
Generate random words by type and category for writing, games, and creativity
Readability Score Calculator
Calculate Flesch-Kincaid, Gunning Fog, SMOG, and 3 more readability scores
Reading Time Calculator
Estimate how long it takes to read any text with readability scores, word stats, and frequency analysis
Screenplay Page Count Calculator
Estimate screen time from page count — or find your target page count from desired runtime
Self-Publishing ROI Calculator
Calculate your return on investment and break-even point for self-published books
Sentence Analyzer
Analyze sentence length variety, opening diversity, structure mix, transition usage, and rhythm with a visual sentence map
Series Read-Through Rate Calculator
Calculate series revenue multiplier and optimal book count based on read-through rates
Social Media Image Sizer
Instant dimension reference for every platform and image type — no guessing, no outdated specs
Social Media Post Analyzer
Score your social media post for engagement, hashtags, CTA, and platform-specific best practices
Story Generator
Generate short fiction from genre, setting, character, and theme — flash fiction to 1000-word stories
Substack Revenue Calculator
Calculate Substack net income after platform fees, Stripe fees, and growth projections
System Prompt Builder
Create structured system prompts for ChatGPT, Claude, and other LLMs with a guided form
Text Statistics Comparator
Paste two texts and see word count, readability, sentence length, and 10+ metrics compared side by side — which text is clearer, more concise, or more complex?
Tone Analyzer
Analyze writing tone across 6 dimensions: formality, sentiment, confidence, friendliness, analytical depth, and urgency
Twitter/X Thread Splitter
Split long text into perfectly sized tweets with thread numbering and character counts
Video Script Analyzer
Score your video script for hook strength, pacing, retention markers, and CTA quality
Word Counter
Count words, characters, sentences, paragraphs, and get reading & speaking time estimates instantly
Writing Prompt Generator
Random creative writing prompts by genre, theme, and format — with typewriter reveal and timed writing mode
Writing Quality Analyzer
Score writing quality across 7 dimensions with context-aware weighting for blog posts, emails, academic papers, social media, and more
Writing Style Analyzer
Analyze readability, sentence structure, vocabulary richness, passive voice usage, and get actionable writing suggestions
YouTube Channel ID Finder
Extract the channel ID, handle, and direct links from any YouTube channel URL — instantly and without API access
YouTube Comment Picker
Randomly pick a winner from YouTube comments — paste comments, filter duplicates, reveal with animation, export results
YouTube Description Generator
Build complete YouTube video descriptions with timestamps, links, social media, and CTAs — copy in one click
YouTube Embed Code Generator
Generate custom YouTube embed codes with autoplay, loop, start time, privacy mode, and responsive CSS wrapper
YouTube Hashtag Generator
Generate YouTube hashtags from your video topic — shows which 3 appear above the title and how many to use
YouTube Monetization Calculator
Estimate YouTube ad revenue from monthly views, CPM, and niche — with 12-month projection chart and milestone goals
YouTube Subscribe Link Generator
Create YouTube subscribe links that auto-prompt the subscription dialog — plus embed button HTML and QR code
YouTube Tag Generator
Generate optimized YouTube tags from your video keyword — with character count, tag types, and one-click copy
YouTube Thumbnail Analyzer
Upload your thumbnail and instantly check resolution, aspect ratio, file size, and format against YouTube's requirements
YouTube Title Generator
Generate click-worthy YouTube title ideas using proven templates — with power words, character counting, and one-click copy
Find the Right Writing or AI Tool for Your Task
Writing questions come in two forms: measurement questions (how long is this piece? how long will it take to read?) and formatting questions (how do I structure this prompt? how should I format this for LinkedIn?). The tools here handle both, covering everything from word count and readability analysis to AI prompt building and social media text formatting.
AI Prompt Building and LLM Tools
Working with AI language models effectively requires understanding how they process input. The Prompt Counter analyzes your text for token count, estimated API cost, and context window usage before you send it — useful for avoiding unexpected token overruns on long documents. The Prompt Builder helps structure prompts with role, context, task, format, and constraints sections, which consistently produces better results than unstructured queries. The System Prompt Builder creates reusable system prompt templates that define AI persona and behavioral guidelines. For comparing models, the LLM Comparison Tool shows current specs and pricing for major models, and the LLM Token Cost Calculator estimates API costs for different usage volumes across providers.
Content Analysis and Readability
The Word Counter counts words, characters, paragraphs, and sentences, and shows reading time estimate. The Reading Time Calculator converts word count to minutes at different reading speeds (average adult reads 200-250 words per minute). For spoken content, the Script Timer estimates speech duration at different speaking paces — important for presentations, videos, and podcast scripts where timing matters. The Keyword Density Checker shows how frequently specific words and phrases appear in a piece of text, expressed as a percentage — useful for SEO content auditing to avoid keyword stuffing. The Writing Style Analyzer evaluates reading level, sentence variety, and passive voice usage to give you a quick readability assessment.
Social Media and Text Formatting
Different platforms have different format requirements, and writing for social media often requires working around platform constraints. The LinkedIn Post Formatter adds line breaks and spacing that render correctly on LinkedIn, where the native editor can be frustrating for structured posts. The Thread Splitter breaks long text into tweet-sized or platform-appropriate chunks while preserving sentence boundaries. The Hashtag Generator suggests relevant hashtags from your post content for Instagram, LinkedIn, and Twitter. The Email Subject Line Analyzer scores subject lines on open rate factors: length, personalization potential, and spam trigger words. For creative text formatting, the Aesthetic Text Generator and ASCII Art Generator produce stylized text for profiles and posts.
Text Generation and Placeholder Content
The Lorem Ipsum Generator produces standard placeholder text for design mockups and prototypes, with options for paragraphs, sentences, or words. The Markdown Table Generator creates properly formatted markdown tables from a simple grid input — helpful for documentation, READMEs, and any platform that renders markdown. The Social Image Sizer shows correct pixel dimensions for images across different platforms and placements (feed posts, stories, cover photos, thumbnails), so you can crop or resize to spec rather than guessing.
Which Tools to Use When
For AI work, start with the Prompt Counter to understand token usage before your current workflow, then use the Prompt Builder if your results are inconsistent — structured prompts solve most consistency problems. For content creation, use the Word Counter and Reading Time tools to hit length targets and ensure readability before publishing. The social media formatters are worth bookmarking if you post regularly to LinkedIn or Twitter — formatting issues on those platforms are annoying enough to warrant a dedicated tool rather than fighting the native editor every time. The LLM Token Cost Calculator is particularly useful for teams evaluating API costs before committing to a specific model or usage pattern — the difference in cost between models can be significant at scale. For anyone writing regularly — blog posts, newsletters, social content, documentation — building a habit of checking word count, reading level, and keyword density before publishing is a low-effort way to consistently improve content quality. These metrics don't replace editorial judgment, but they surface objective issues (too long, too complex, keyword overuse) that are easy to miss when you're close to your own writing. All writing tools work entirely in your browser, so you can paste sensitive text (internal documents, unreleased content, personal writing) without worrying about that text being transmitted to an external server or stored in a database. This is particularly relevant for AI prompt tools when you're working with proprietary information — the Prompt Counter analyzes your text locally rather than sending it to a third-party service just to count tokens. The Instagram Caption tool and Email Subject Line Analyzer are quick-use tools for content creators who want a fast check before posting, without needing a full content management or marketing platform to access basic analytics. The Lorem Ipsum Generator and Markdown Table Generator serve developers and designers who need placeholder content or formatted tables quickly during build or prototyping work.
FAQ
Are these tools free?
Yes, every tool is completely free to use with no signup, no account, and no hidden fees.
Is my data safe?
Absolutely. All calculations run locally in your browser. No data is sent to any server or stored anywhere.
Do I need to create an account?
No. Every tool works instantly with no registration required. Just open and start using.
What is a token in the context of AI language models?
A token is the basic unit of text that AI language models process — roughly 0.75 words on average, or about 4 characters. Common words like 'the' and 'and' are typically single tokens; longer or uncommon words may be split into multiple tokens. API costs are billed per token for both input and output, and context window limits are also measured in tokens. The Prompt Counter shows your token count before you send a prompt.
How many words per minute should I budget for a spoken presentation?
Most professional speakers target 130-150 words per minute for a clear, deliberate pace. Conversational speech is 150-180 words per minute. Fast speech reaches 200+ words per minute but can lose audience comprehension. The Script Timer uses 150 wpm as its default pace and lets you adjust for your personal speaking speed.
What keyword density is ideal for SEO?
There's no universal optimal keyword density, but most SEO guidance suggests keeping primary keyword density around 1-2% of total word count. Above 3-4% starts to look like keyword stuffing to search engines. More important than density is that the keyword appears naturally in headings, the opening paragraph, and the conclusion. The Keyword Density Checker shows density as a percentage so you can evaluate whether your usage looks natural.
Why does LinkedIn formatting look broken when I paste from Word?
LinkedIn strips most rich text formatting and handles line breaks inconsistently when pasting from external sources. The LinkedIn Post Formatter adds explicit line break characters that LinkedIn recognizes, so structured posts with spacing between sections render correctly in the feed. Copy the formatted output and paste that into LinkedIn rather than pasting your original draft.